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During science class, students combined 1 kg of iron filings with 1 kg of sand to create a mixture. Which of the following methods would be best for separating the iron filings from the sand?
|
allenai/ai2_arc
|
[
"Stir the mixture into hot water to dissolve the sand.",
"Strain the mixture through a paper filter to collect the sand.",
"Drag a magnet through the mixture to attract the iron filings.",
"Shake the mixture to cause the iron filings to settle to the bottom."
] |
C
| |
A plant needs to feed, so it
|
allenai/openbookqa
|
[
"spreads it's leaves",
"has a bite",
"spreads upside down",
"catches rabbits"
] |
A
| |
What kind of energy comes from the position of a charged particle in an electric field?
|
allenai/sciq
|
[
"mechanical energy",
"potential energy",
"solar energy",
"thermal energy"
] |
B
|
Electric potential energy comes from the position of a charged particle in an electric field. For example, when two negative charges are close together, they have potential energy because they repel each other and have the potential to push apart. If the charges actually move apart, their potential energy decreases. Electric charges always move spontaneously from a position where they have higher potential energy to a position where they have lower potential energy. This is like water falling over a dam from an area of higher to lower potential energy due to gravity.
|
Which is the best tool to measure the angles of a triangular object?
|
allenai/ai2_arc
|
[
"a meter stick",
"a compass",
"a protractor",
"a spring scale"
] |
C
| |
Which layer of epidermis is underdeveloped in pre-term baby?
|
openlifescienceai/medmcqa
|
[
"Stratum germinativum",
"Stratum granulosum",
"Stratum lucidum",
"Stratum corneum"
] |
D
|
Ans. d. Stratum corneumStratum corneum is underdeveloped in preterm or very low birth weight (VLBW) infants in initial 7 days.The development of the layers of the epidermis starts from below upwards. Therefore, stratum basale is first to be form and stratum corneum is the last layer to form.In preterm infants, stratum corneum is permeable and becomes similar to the adult and full term infant after 2 to 3 weeks postnatal maturation.
|
In which state of matter do particles take the shape of their container, but cannot expand to fill it?
|
allenai/sciq
|
[
"chemical",
"liquid",
"gas",
"mixture"
] |
B
|
A liquid is a state of matter in which particles can slip past one another and take the shape of their container. However, the particles cannot pull apart and spread out to take the volume of their container.
|
Radiocarbon is useful for dating relatively young materials with what element as their base?
|
allenai/sciq
|
[
"oxygen",
"nitrogen",
"carbon",
"hydrogen"
] |
C
|
Radiocarbon is useful for relatively young, carbon-based materials. Other longer-lived isotopes are good for older rocks and minerals.
|
A hydraulic jack that makes it possible to lift a car easily is an example of what, meaning it produces mechanical advantages?
|
allenai/sciq
|
[
"quantum physics",
"simple machine",
"simple weapon",
"complex machines"
] |
B
|
A person is able to lift the entire rear end of the automobile using only one hand with the hydraulic jack shown in the image. Hydraulic systems are similar to simple machines in that they can produce very large mechanical advantages.
|
Anti-glaucoma drug use to increase uveoscleral outflow is
|
openlifescienceai/medmcqa
|
[
"Acetazolamide",
"Pilocarpine",
"Latanoprost",
"Timolol"
] |
C
|
(Refer: Parson's, 21st edition, pg no: 154,155)
|
A particular library has 75 books in a special collection, all of which were in the library at the beginning of the month. These book are occasionally loaned out through an inter-library program. If, by the end of the month, 65 percent of books that were loaned out are returned and there are 61 books in the special collection at that time, how many books of the special collection were loaned out during that month?
|
deepmind/aqua_rat
|
[
"20",
"30",
"35",
"40"
] |
D
|
The total number of books is 75.
Let x be the number of books which were loaned out.
65% of books that were loaned out are returned.
35% of books that were loaned out are NOT returned.
Now, there are 61 books, thus the number of un-returned books is 75-61 = 14 books.
0.35x = 14
x = 40
The answer is D.
|
Angiosperm seed develops inside of what?
|
allenai/sciq
|
[
"a kidney",
"the pancreas",
"fallopian tubes",
"an ovary"
] |
D
|
In gymnosperms, a seed develops on the scale of a cone. Only an angiosperm seed develops inside an ovary.
|
Sub lingual gland is situated between:
|
openlifescienceai/medmcqa
|
[
"Hyoglossus and genioglossus",
"Hyoglossus and styloglossus",
"Genioglossus and mandible",
"Geniohyoid and genioglossus"
] |
C
|
Sublingual fossa is a shallow area above the anterior part of the mylohyoid line and lodges sublingual gland.
SUBLINGUAL GLAND
This is smallest of the three pairs of large salivary glands. It lies in the floor of the mouth between the mucus membrane and the mylohyoid muscle. It is almond shaped and rests in the sublingual fossa of the mandible. It is separated from the base of the tongue by the submandibular duct. It is mostly mucus in nature and weighs about 3–4g.
|
The symphony sells two kinds of tickets: orchestra, for $30, and upper tiers, for $12. On a certain night, the symphony sells 90 tickets and gets $1980 in revenue from the sales. How many orchestra tickets did they sell?
|
deepmind/aqua_rat
|
[
"20",
"30",
"40",
"50"
] |
D
|
Let x be the number of orchestra tickets.
Then 90-x is the number of upper tier tickets.
30x + 12(90-x) = 1980
18x = 1980-1080
x = 50
The answer is D.
|
Frilled sharks and angler fish live far beneath the surface of the ocean, which is why they are known as
|
allenai/openbookqa
|
[
"Deep sea animals",
"fish",
"Long Sea Fish",
"Far Sea Animals"
] |
A
| |
A man goes from A to B at a speed of 20 kmph and comes back to A at a speed of 30 kmph. Find his average speed for the entire journey?
|
deepmind/aqua_rat
|
[
"20",
"24",
"10",
"27"
] |
B
|
Distance from A and B be 'd'
Average Speed = total distance/total time
Average Speed = (2d)/[(d/20) + (d/30)]
= (2d)/[5d/60) => 24 kmph.
Answer: B
|
Why do microwaves have a higher energy than radio waves?
|
allenai/sciq
|
[
"higher frequency",
"higher resonance",
"higher decibel",
"lower frequency"
] |
A
|
Find the microwave in the Figure above . A microwave is an electromagnetic wave with a relatively long wavelength and low frequency. Microwaves are often classified as radio waves, but they have higher frequencies than other radio waves. With higher frequencies, they also have more energy. That’s why microwaves are useful for heating food in microwave ovens. Microwaves have other important uses as well, including cell phone transmissions and radar. These uses are described below. You can learn more about microwaves and their uses in the video at this URL: http://www. youtube. com/watch?v=YgQQb1BVnu8 .
|
The hormones epinephrine and norepinephrine are released by what?
|
allenai/sciq
|
[
"nutrients medulla",
"uptake medulla",
"external medulla",
"adrenal medulla"
] |
D
|
Short-term Stress Response When presented with a stressful situation, the body responds by calling for the release of hormones that provide a burst of energy. The hormones epinephrine (also known as adrenaline) and norepinephrine (also known as noradrenaline) are released by the adrenal medulla. How do these hormones provide a burst of energy? Epinephrine and norepinephrine increase blood glucose levels by stimulating the liver and skeletal muscles to break down glycogen and by stimulating glucose release by liver cells. Additionally, these hormones increase oxygen availability to cells by increasing the heart rate and dilating the bronchioles. The hormones also prioritize body function by increasing blood supply to essential organs such as the heart, brain, and skeletal muscles, while restricting blood flow to organs not in immediate need, such as the skin, digestive system, and kidneys. Epinephrine and norepinephrine are collectively called catecholamines.
|
What is a disease characterized by high concentrations of glucose in the blood?
|
allenai/sciq
|
[
"leukemia",
"diabetes",
"hepatitis",
"myeloma"
] |
B
|
Figure 20.13 Diabetes is a disease characterized by high concentrations of glucose in the blood. Treating diabetes involves making lifestyle changes, monitoring blood-sugar levels, and sometimes insulin injections. (credit: “Blausen Medical Communications”/Wikimedia Commons).
|
What is the name of the spacecraft that has performed the closest flyby of uranus?
|
allenai/sciq
|
[
"Zodiac 4",
"centaur 2",
"Mercury 7",
"voyager 2"
] |
D
|
Uranus is so far away that there has been relatively little exploration of the planet. The closest approach was a flyby by Voyager 2 in 1986. Great images have also been taken by the Hubble Space Telescope.
|
The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is?
|
deepmind/aqua_rat
|
[
"41 years",
"40 years",
"76 years",
"14 years"
] |
B
|
Sum of the present ages of husband, wife and child
= (27 * 3 + 3 * 3) = 90 years.
Sum of the present age of wife and child
= (20 * 2 + 5 * 2) = 50 years.
Husband's present age
= (90 - 50) = 40 years.
Answer:B
|
A hydrologist is studying the acidity level of a city lake. She collects samples twice a week and takes them to her lab to test them. After testing the samples, she places the data on a graph. She tells the city engineers that her tests indicate that the pH level has been steadily dropping over the past few months. Which of the following steps is the best way to check the accuracy of her data?
|
allenai/ai2_arc
|
[
"retest new samples",
"retest the original samples",
"show the graphs to the engineers",
"show the samples to the engineers"
] |
B
| |
When light transfers its energy to objects, this is known as what?
|
allenai/sciq
|
[
"condensation",
"absorption",
"evaporation",
"accumulation"
] |
B
|
Light may transfer its energy to matter rather than being reflected or transmitted by matter. This is called absorption . When light is absorbed, the added energy increases the temperature of matter. If you get into a car that has been sitting in the sun all day, the seats and other parts of the car’s interior may be almost too hot to touch, especially if they are black or very dark in color. That’s because dark colors absorb most of the sunlight that strikes them.
|
Which of the following regulators would MOST likely inhibit the lower esophageal sphincter in normal individuals?
|
openlifescienceai/medmcqa
|
[
"Acetylcholine and substance P",
"Substance P and nitric oxide",
"Substance P only",
"Vasoactive intestinal polypeptide and nitric oxide"
] |
D
|
Physiologically impoant inhibitors of the lower esophageal sphincter include nitric oxide and vasoactive intestinal polypeptide. Physiologically impoant substances that stimulate the lower esophageal sphincter include acetylcholine and substance P. Also Know: VIP contains 28 amino acid residues. It is found in nerves in the gastrointestinal tract and thus is not itself a hormone, despite its similarities to secretin. VIP is, however, found in blood, in which it has a half-life of about 2 min. GIP contains 42 amino acid residues and is produced by K cells in the mucosa of the duodenum and jejunum. Its secretion is stimulated by glucose and fat in the duodenum, and because in large doses it inhibits gastric secretion and motility, it was named gastric inhibitory peptide. Ref: Barrett K.E., Barman S.M., Boitano S., Brooks H.L. (2012). Chapter 25. Overview of Gastrointestinal Function & Regulation. In K.E. Barrett, S.M. Barman, S. Boitano, H.L. Brooks (Eds), Ganong's Review of Medical Physiology, 24e.
|
Which vertebrae carry the greatest amount of body weight and are thus characterized by the large size and thickness of the vertebral body?
|
allenai/sciq
|
[
"invertebrae",
"lumbar vertebrae",
"thickness vertebrae",
"artery vertebrae"
] |
B
|
Lumbar Vertebrae Lumbar vertebrae carry the greatest amount of body weight and are thus characterized by the large size and thickness of the vertebral body (Figure 7.28). They have short transverse processes and a short, blunt spinous process that projects posteriorly. The articular processes are large, with the superior process facing backward and the inferior facing forward.
|
What is utilized to analyze simple mendelian inheritance?
|
allenai/sciq
|
[
"trait",
"dna",
"origins",
"pedigree"
] |
D
|
Inheritance in humans is not as straight-forward as that in the pea plant. Though some traits are inherited in simple Mendelian fashion, many are not. To analyze simple Mendelian inheritance a pedigree is often utilized. This is especially helpful in tracking the inheritance of a specific trait, characteristic or disorder (or allele) through a family.
|
3*13+3*14+3*17+11 = ?
|
deepmind/aqua_rat
|
[
"125",
"126",
"130",
"143"
] |
D
|
3*13+3*14+3*17+11 = 39 + 42 + 51 + 11 = 143
The answer is D.
|
The movement of ice causes glaciers to have cracks referred to as?
|
allenai/sciq
|
[
"crevasses",
"slides",
"fissures",
"anomalies"
] |
A
|
Because the ice is moving, glaciers have cracks called crevasses ( Figure below ). There is a large crevasse at the top of an alpine glacier called a bergshrund . Below the bergshrund, the ice is moving downhill. Above the bergshrund, the ice is stuck to the mountain.
|
Internal resistance, or (electrical) resistance in general, involves the resistance of the flow of what?
|
allenai/sciq
|
[
"water",
"force",
"current",
"protons"
] |
C
|
Internal Resistance As noted before, a 12-V truck battery is physically larger, contains more charge and energy, and can deliver a larger current than a 12-V motorcycle battery. Both are lead-acid batteries with identical emf, but, because of its size, the truck battery has a smaller internal resistance r . Internal resistance is the inherent resistance to the flow of current within the source itself. Figure 21.9 is a schematic representation of the two fundamental parts of any voltage source. The emf (represented by a script E in the figure) and internal resistance r are in series. The smaller the internal resistance for a given emf, the more current and the more power the source can supply.
|
What is the force of attraction between things that have mass
|
allenai/sciq
|
[
"friction",
"gravity",
"momentum",
"motion"
] |
B
|
Gravity has traditionally been defined as a force of attraction between things that have mass. The strength of gravity between two objects depends on their mass and their distance apart.
|
man is 15 years older than his son. In two years, his age will be twice the age of his son. The present age of his son is:
|
deepmind/aqua_rat
|
[
"13years",
"26 years",
"17 years",
"18 years"
] |
A
|
Let the son's present age be x years. Then, man's present age = (x + 20) years.
(x + 15) + 2 = 2(x + 2)
x + 17 = 2x + 4
x = 13.
answer :A
|
Rems, rads, and curies are all used to measure what?
|
allenai/sciq
|
[
"thermal energy",
"gravity",
"radioactivity",
"potential energy"
] |
C
|
Radioactivity can be expressed in a variety of units, including rems, rads, and curies.
|
In materials science and engineering, what does the term \"pinch\" most commonly refer to?
|
mvujas/stem_mcqa_questions
|
[
"A sharp increase in temperature in a localized region of a material.",
"A sudden decrease in the thickness of a material at a specific point.",
"The phenomenon where the electrical resistance increases in a semiconductor.",
"The focusing of plasma in high-intensity magnetic fields."
] |
D
|
In the context of materials science and especially plasma physics, the term \"pinch\" most commonly refers to the electromagnetic compression of plasma using magnetic fields. This phenomenon is used to achieve conditions necessary for nuclear fusion reactions, among other applications. The magnetic field lines \"pinch\" the plasma, increasing its density and temperature.
|
t(2,8) is associated with:
|
openlifescienceai/medmcqa
|
[
"T cell ALL",
"B cell ALL",
"CML",
"CLL"
] |
B
|
t(2,8) causing translocation vetween immunoglobulins k chain on chromosome 2 and the myc gene present on chromosome 8 and is seen in Burkitts lymphoma .The translocation results in the increased expression of c-myc resulting in development of neoplasia. (ref Robbins 8th/608)
|
iloprost used in pulmonary hypertension-
|
openlifescienceai/medmcqa
|
[
"Inhalation",
"Intravenous",
"Oral",
"Subcutaneous"
] |
A
| |
What links together to form long polymeric chains?
|
allenai/sciq
|
[
"lipids",
"nucleotides",
"peptides",
"genes"
] |
B
|
(a) When pyrimidine or purine and a sugar react to form a glycosidic bond, a nucleoside is produced. Adding a phosphoric acid group to the sugar of a nucleoside produces a nucleotide. (b) Nucleotides link together to form long polymeric chains. A DNA molecule consists of two such chains held together by hydrogen bonding between the purine and pyrimidine components on different chains. Mutations in the DNA of an organism may lead to the synthesis of defective proteins. Phenylketonuria (PKU), for example, is a condition caused by a defective enzyme. Left.
|
Where is the seafloor youngest?
|
allenai/sciq
|
[
"inland",
"sand bars",
"mid-ocean",
"deep currents"
] |
C
|
Seafloor is youngest near the mid-ocean ridges and gets progressively older with distance from the ridge. Orange areas show the youngest seafloor. The oldest seafloor is near the edges of continents or deep sea trenches.
|
Which would be a source of pollutants?
|
allenai/openbookqa
|
[
"cars",
"oceans",
"glaciers",
"storms"
] |
A
| |
Albert invested amount of 8000 in a fixed deposit for 2 years at compound interest rate of 5 % per annum. How much Albert will get on the maturity of the fixed deposit
|
deepmind/aqua_rat
|
[
"Rs. 8510",
"Rs. 8620",
"Rs. 8730",
"Rs. 8820"
] |
D
|
Explanation:
=>(8000×(1+5/100)2)
=>8000×21/20×21/20
=>8820
Option D
|
Enzymes - proteins which speed up what?
|
allenai/sciq
|
[
"chemical reactions",
"physical reactions",
"liquid reactions",
"crystals reactions"
] |
A
|
enzymes - proteins which speed up chemical reactions.
|
If w and s are positive integers such that (2^w)(4^s) = 16, then 2w + s =
|
deepmind/aqua_rat
|
[
" 2",
" 3",
" 4",
" 5"
] |
D
|
lets get the eq into simplest orm..
(2^w)(4^s) = 16..
(2^w)(2^2s) = 2^4..
or w+2s=4..
since w and s are positive integers, only w as 2 and s as 1 satisfy the Equation..
so 2w+s=2*2+1=5..
D
|
Nosocomial infections are those which develop:
|
openlifescienceai/medmcqa
|
[
"24 hours after hospitalization",
"Within 48 hours of hospitalization",
"After 48 hours of hospitalization",
"After 7 days of hospitalization"
] |
C
|
Ans. (c) After 48 hours of hospitalizationRef.: K. Park 23rd ed. / 94, 359* Nosocomial infections are hospital acquired infections.* It is considered nosocomial if it develops after a minimum of 48 hours of hospitalization.* Most common organism responsible for nosocomial infection: Staph. Aureus.
|
What stimulates the changes of pubery?
|
allenai/sciq
|
[
"parenting",
"mutation",
"sex hormones",
"sex education"
] |
C
|
The gonads are glands that secrete sex hormones. Male gonads are called testes. They secrete the male sex hormone testosterone. The female gonads are called ovaries. They secrete the female sex hormone estrogen. Sex hormones stimulate the changes of puberty. They also control the production of sperm or eggs by the gonads.
|
What helps pumice float in water?
|
allenai/sciq
|
[
"high density",
"large mass",
"gas bubble holes",
"gravity"
] |
C
|
Some extrusive igneous rocks cool so rapidly that crystals do not develop at all. These form a glass, such as obsidian. Others, such as pumice, contain holes where gas bubbles were trapped in the lava. The holes make pumice so light that it actually floats in water. The most common extrusive igneous rock is basalt. It is the rock that makes up the ocean floor. Shown below are three types of extrusive igneous rocks ( Figure below ).
|
The reason you tend to think of the color white when you think of environments where its constantly freezing, is because those place get tons of
|
allenai/openbookqa
|
[
"Chipmunks",
"droughts",
"snowfall",
"monkeys"
] |
C
| |
A bus 15 m long is running with a speed of 40 km/hr. In what time will it pass a man who is skateboarding at 8 km/hr in the direction opposite to that in which the car is going?
|
deepmind/aqua_rat
|
[
"1.125",
"1.5",
"1.75",
"1.25"
] |
A
|
Speed of bus relative to man = 40 + 8 = 48 km/hr.
= 48 * 5/18 = 40/3 m/sec.
Time taken to pass the man = 5 * 3/40
= 1.125 sec.
Answer: A
|
Physical and chemical differences help ecologists distinguish between freshwater and marine types of what?
|
allenai/sciq
|
[
"cities",
"habitats",
"biomes",
"microbiomes"
] |
C
| |
Headaches are associated with which body system?
|
allenai/sciq
|
[
"cardiovascular system",
"respiratory system",
"circulatory system",
"nervous system"
] |
D
|
We all get headaches. Headaches are a relatively minor problem associated with the nervous system. But what about more serious issues of the nervous system? As you can probably imagine, these can be extremely serious.
|
A student is playing with a small toy boat on a pond. The student throws a rock in the pond. This creates waves that move the boat toward the shore. The boat moves toward the shore because the waves transfer
|
allenai/ai2_arc
|
[
"energy.",
"heat.",
"motion.",
"water."
] |
A
| |
What process refers to the conversion of atmospheric nitrogen to ammonia?
|
allenai/sciq
|
[
"biological ammonia fixation",
"biological nitrogen fixation",
"biological respiratory fixation",
"biological nutrient fixation"
] |
B
|
31.3 Nutritional Adaptations of Plants Atmospheric nitrogen is the largest pool of available nitrogen in terrestrial ecosystems. However, plants cannot use this nitrogen because they do not have the necessary enzymes. Biological nitrogen fixation (BNF) is the conversion of atmospheric nitrogen to ammonia. The most important source of BNF is the symbiotic interaction between soil bacteria and legumes. The bacteria form nodules on the legume’s roots in which nitrogen fixation takes place. Fungi form symbiotic associations (mycorrhizae) with plants, becoming integrated into the physical structure of the root. Through mycorrhization, the plant obtains minerals from the soil and the fungus obtains photosynthate from the plant root. Ectomycorrhizae form an extensive dense sheath around the root, while endomycorrhizae are embedded within the root tissue. Some plants—parasites, saprophytes, symbionts, epiphytes, and insectivores—have evolved adaptations to obtain their organic or mineral nutrition from various sources.
|
Which animal interacts most with a peony?
|
allenai/openbookqa
|
[
"human",
"bee",
"elephant",
"worm"
] |
B
| |
if a person cover 3/5 part of his journey by train,7/20 part of his journey by bus and rest 6.5 km. by walk.what is total distance of his journey?
|
deepmind/aqua_rat
|
[
"65 km",
"100 km",
"120 km",
"130 km"
] |
D
|
let total distance be=x km.then,
3x/5+7x/20+6.5=x;12x+7x+130=20x;x=130
hence total distance=130 km.
answer D
|
Mammals generally lack a cloaca and have a separate opening for the what?
|
allenai/sciq
|
[
"digestive tract",
"tissues tract",
"urinary tract",
"physical tract"
] |
A
| |
pushing an object requires
|
allenai/openbookqa
|
[
"studying",
"dancing",
"singing",
"exherted effort"
] |
D
| |
A rabbit receives his essential elements from his
|
allenai/openbookqa
|
[
"boat",
"stock brokers",
"subway",
"circulation system"
] |
D
| |
An electron is moving with a velocity \( \vec{v} \) in a uniform magnetic field \( \vec{B} \). Which of the following correctly describes the nature of the force acting on the electron due to the magnetic field?
|
mvujas/stem_mcqa_questions
|
[
"The force is parallel to the velocity.",
"The force is perpendicular to both the velocity and the magnetic field.",
"The force is parallel to the magnetic field.",
"The force is perpendicular to the magnetic field but parallel to the velocity."
] |
B
|
According to the Lorentz force law, the magnetic force \( \vec{F} \) on a charged particle with charge \( q \) moving with velocity \( \vec{v} \) in a magnetic field \( \vec{B} \) is given by:
\[ \vec{F} = q (\vec{v} \times \vec{B}) \]
This is a cross product, which means the resulting force \( \vec{F} \) is perpendicular to both \( \vec{v} \) (the velocity of the electron) and \( \vec{B} \) (the magnetic field). This perpendicular force causes the electron to move in a circular or helical path rather than affecting its speed.
|
Consider a dataset with \( N \) data points, each having \( D \) features. If we apply Stochastic Gradient Descent (SGD) for optimizing a machine learning model, what is the computational complexity of one parameter update?
|
mvujas/stem_mcqa_questions
|
[
"O(1)",
"O(D)",
"O(N)",
"O(ND)"
] |
B
|
Stochastic Gradient Descent (SGD) updates the model parameters based on a single data point chosen randomly from the dataset. Unlike batch gradient descent, which computes the gradient using all \( N \) data points and thus has a higher complexity, SGD calculates the gradient using only one data point at a time. For each update, we compute the gradient of the cost function with respect to the \( D \) features of the chosen data point, resulting in a computational complexity directly proportional to the number of features, \( D \).
|
A student heated a pan of soup on a stove. While stirring the soup with a metal spoon, the student noticed the spoon became very warm. What is the most likely reason the spoon became warm?
|
allenai/ai2_arc
|
[
"The stirring action heated the spoon.",
"Warm air in the room heated the spoon.",
"Heat from the soup was transferred to the spoon.",
"The student's hand transferred heat to the spoon."
] |
C
| |
Torniquet test is a function of
|
openlifescienceai/medmcqa
|
[
"Platelet function",
"Capillary fragility",
"Intrinsic pathway",
"Extrinsic pathway"
] |
B
| |
What is the first stage of cellular respiration?
|
allenai/sciq
|
[
"breath",
"photosynthesis",
"defacation",
"glycolysis"
] |
D
|
Glycolysis is the first stage of cellular respiration. It takes place in the cytoplasm of the cell. The world glycolysis means "glucose splitting". That's exactly what happens in this stage. Enzymes split a molecule of glucose into two smaller molecules called pyruvate. This results in a net gain of two molecules of ATP. Other energy-storing molecules are also produced. (Their energy will be used in stage 3 to make more ATP. ) Glycolysis does not require oxygen. Anything that doesn't need oxygen is described as anaerobic .
|
if something moves faster than before, it might have been affected by what?
|
allenai/openbookqa
|
[
"the application of water",
"the application of force",
"the application of light",
"none of these"
] |
B
| |
Basidiomycetes do what to wood and other plant material?
|
allenai/sciq
|
[
"decompose",
"evolve",
"revive",
"evaporate"
] |
A
| |
In mismatch repair, other enzymes remove and replace incorrectly paired nucleotides that have resulted from what?
|
allenai/sciq
|
[
"typing errors",
"replication errors",
"evolution errors",
"interaction errors"
] |
B
| |
Diseases associated with rodents include all except
|
openlifescienceai/medmcqa
|
[
"Leptospirosis",
"Rat Bite fever",
"Tularemia",
"Oriental sore"
] |
D
|
1. Bacterial
Plague
Tularaemia
Salmonellosis
2. Viral
Lassa fever
Hemorrhagic fever
Encephalitis
3. Rickettsial
Scrub typhus
Murine (Flea-borne) typhus
Rickettsial pox
4. Parasitic
Hymenolepis dimunita
Leishmaniasis
Amoebiasis
Trichinosis
Chagas disease
5. Others
Rat bite fever
Leptospirosis
Histoplasmosis
|
Three business people who wish to invest in a new company. Each person is willing to pay one third of the total investment. . After careful calculation, they realize that each of them would pay $ 7500 less if they could find two more equal investors. How much is the total investment in the new business.
|
deepmind/aqua_rat
|
[
"a)\t$ 64,000",
"b)\t$ 56,250",
"c)\t$ 21,000",
"d)\t$ 5,400"
] |
B
|
Initially each invest in x. Hence total investment is 3x.
Total investment is also 5(x-7500).
3x = 5(x-7500)
x= 5*7500/2 = 18750
3x = 56250 and the answer is B.
|
Around 97% of all water on earth is what type of water?
|
allenai/sciq
|
[
"rivers water",
"salt water",
"fresh water",
"excess water"
] |
B
|
The Water Cycle Water is essential for all living processes. The human body is more than one-half water and human cells are more than 70 percent water. Thus, most land animals need a supply of fresh water to survive. Of the stores of water on Earth, 97.5 percent is salt water (Figure 20.9). Of the remaining water, 99 percent is locked as underground water or ice. Thus, less than one percent of fresh water is present in lakes and rivers. Many living things are dependent on this small amount of surface fresh water supply, a lack of which can have important effects on ecosystem dynamics. Humans, of course, have developed technologies to increase water availability, such as digging wells to harvest groundwater, storing rainwater, and using desalination to obtain drinkable water from the ocean. Although this pursuit of drinkable water has been ongoing throughout human history, the supply of fresh water continues to be a major issue in modern times.
|
Find the simple interest on Rs.350 for 10 months at 5 paisa per month?
|
deepmind/aqua_rat
|
[
"277",
"175",
"288",
"266"
] |
B
|
I = (350*10*5)/100 = 175
Answer: B
|
What is a thermometer used to measure?
|
allenai/openbookqa
|
[
"height",
"weight",
"oxygen density",
"warmness"
] |
D
| |
Sn\u00f6zon is an idealized weather phenomenon in which snowflakes are assumed to fall uniformly across an infinite plane. If the rate of snowfall is constant and equals \( r \) snowflakes per unit area per unit time, what is the expected time \( T \) required for any given point on the plane to accumulate a height of \( h \) units of snow?
|
mvujas/stem_mcqa_questions
|
[
"\\( \\frac{h}{r} \\)",
"\\( hr \\)",
"\\( \\frac{r}{h} \\)",
"\\( \\sqrt{\\frac{h}{r}} \\)"
] |
A
|
The rate of snowfall \( r \) represents the number of snowflakes per unit area per unit time. To determine the time \( T \) it takes to accumulate a height of \( h \) units of snow, we rationalize that the height \( h \) is directly proportional to the volume of snow. Given that \( r \) is the snowfall rate per unit area per unit time, we can express the accumulation of height as \( T = \frac{h \times \text{(unit area)}}{r \times \text{(unit area)}} = \frac{h}{r} \).
|
Which substance is capable of dripping?
|
allenai/openbookqa
|
[
"Oxygen",
"Juice",
"Wood",
"Lightning"
] |
B
| |
The sound, light, and heat that a firecracker produces are originally stored as which type of energy?
|
allenai/ai2_arc
|
[
"nuclear energy",
"chemical energy",
"electrical energy",
"mechanical energy"
] |
B
| |
A man standing at a point P is watching the top of a tower, which makes an angle of elevation of 30º with the man's eye. The man walks some distance towards the tower to watch its top and the angle of the elevation becomes 60º. What is the distance between the base of the tower and the point P?
|
deepmind/aqua_rat
|
[
"43 units",
"8 units",
"12 units",
"Data inadequate"
] |
D
|
One of AB, AD and CD must have given.
So, the data is inadequate.
ANSWER:D
|
The sun and all objects held by it's gravity make up the?
|
allenai/sciq
|
[
"planet",
"atmosphere",
"solar system",
"milky way"
] |
C
|
The Sun and all the objects held by its gravity make up the solar system.
|
A shopkeeper fixes the marked price of an item 30% above its cost price. The percentage of discount allowed to gain 6% is
|
deepmind/aqua_rat
|
[
"18.45%",
"18.46%",
"18.47%",
"18.48%"
] |
B
|
Explanation:
Let the cost price = Rs 100
then, Marked price = Rs 130
Required gain = 6%,
So Selling price = Rs 106
Discount = 130 - 106 = 24
Discount% = (24/130)*100 = 18.46%
Option B
|
What is the most complex organ in the human body?
|
allenai/sciq
|
[
"heart",
"brain",
"muscular",
"liver"
] |
B
|
The human brain is an amazing organ. It is the most complex organ in the human body. By adulthood, the brain weighs about 3 pounds and consists of billions of neurons. All those cells need a lot of energy. In fact, the adult brain uses almost a quarter of the total energy used by the body!.
|
Two men are walking towards each other alongside a railway track. A freight train overtakes one of them in 20 seconds and exactly 10 minutes later meets the other man coming from the opposite direction. The train passes this man is 18 seconds. Assume the velocities are constant throughout. How long after the train has passed the second man will the two men meet?
|
deepmind/aqua_rat
|
[
"89.7 minutes",
"90 minutes",
"90.3 seconds",
"91 seconds"
] |
B
|
Explanation :
Let ‘L’ be the length of train, ‘x’ be the speed of the first man, ‘y’ be the speed of the second man and ‘z’ be the speed of the train.
=>20=1/(z−x) and
=>18=1/(z+x)
=>z=10x+9y.
Distance between the two men =600(z+y).
Time = (600(z+y)-600(x+y))/(x+y).
=>600(9x+9y)/(x+y).
=> 90 minutes.
Answer : B
|
Which of the following allows a cell to become specialized?
|
allenai/ai2_arc
|
[
"location of the cell in the body",
"function of the cell in the body",
"different patterns of gene expression",
"different combinations of genes in the nucleus"
] |
C
| |
From 2005 to 2015 the world's population grew by 11.27%, and from 2005 to 2010 the world's population grew by 6.20%. What was the percentage growth in the world's population from 2010 to 2015?
|
deepmind/aqua_rat
|
[
" 5%",
" 6%",
" 2%",
" 2.5%"
] |
A
|
Let the world's population in 2005 = x; then,
for 2005-2010, the population equation is x + 0.0620x = 1.0620x,
for 2005-2015, the population equation is x + 0.1127x = 1.1127x;
so, the growth from 2010 to 2015 = (1.1127x - 1.060x)/(1.062x) = 0.05 (rounded). Thus, the answer is 5%.
Answer is A
|
What is a mutation that changes all or much of a particular chromosome?
|
allenai/sciq
|
[
"chromosomal mutation",
"muscular mutation",
"kinetic mutation",
"biochemical mutation"
] |
A
|
A mutation that changes all or a large part of a chromosome is called a chromosomal mutation. This type of mutation tends to be very serious. Sometimes chromosomes are missing or extra copies are present. An example is the mutation that causes Down syndrome. In this case, there is an extra copy of one of the chromosomes.
|
Sooj learned that whales use vocalization to navigate and to communicate with other whales. Some scientists think that noise pollution in whale habitats may harm whale populations. What would be the most likely effect of noise pollution on whales?
|
allenai/ai2_arc
|
[
"alteration of whale genetic material",
"reversed flow of energy through whale habitats",
"reduced populations of food organisms in whale habitats",
"separation of whale family groups"
] |
D
| |
Greenhouses are great for plants like
|
allenai/openbookqa
|
[
"Pizza",
"Lollipops",
"Candles",
"French beans"
] |
D
| |
All new alleles are formed by what types of mutations?
|
allenai/sciq
|
[
"systemic",
"random",
"ordinary",
"chaotic"
] |
B
| |
A coal miner would is most likely to get
|
allenai/openbookqa
|
[
"wet",
"dirty",
"sunburned",
"windburned"
] |
B
| |
Many hydrocarbons are cyclic and adopt specific three-dimensional structures that influence their physical and what properties?
|
allenai/sciq
|
[
"electrical",
"liquid",
"radiation",
"chemical"
] |
D
|
Many hydrocarbons are cyclic and adopt specific three-dimensional structures that influence their physical and chemical properties.
|
If the stars in the sky above your home vary from month to month,
|
allenai/openbookqa
|
[
"that is a new phenomenon",
"that is expected due to the axis",
"that is very scary",
"that is rare and unusual"
] |
B
| |
What will $3000 amount to in three years if it is invested at 20% per year compound interest, with the interest being compounded annually?
|
deepmind/aqua_rat
|
[
"$4316",
"$4632",
"$4864",
"$5184"
] |
D
|
After one year: 1.2 * $3000
After two years: (1.2)^2 * $3000
After three years: (1.2)^3 * $3000 = $5184
The answer is D.
|
A mixture of 70 liters of wine and water contains 10% water. How much water must be added to make water 12 ½% of the total mixture?
|
deepmind/aqua_rat
|
[
"12 liters",
"10 liters",
"4 liters",
"2 liters"
] |
D
|
70 * (10/100) = 7
Wine Water
87 1/2% 12 1/2%
87 1/2% ------- 63
12 1/2% -------? => 9-7=2
ANSWER:D
|
ORS plus zinc is given in diarrhea because?
|
openlifescienceai/medmcqa
|
[
"Reduces infection",
"Antispasmodic",
"Reduces duration of diarrhoea",
"Enhance sodium absorption"
] |
C
|
Zinc reduces severity of illness so it reduces the duration of diarrhea. Zinc should be given for 14 days in any episode of gastroenteritis in children Zinc upgrades the immunity, so the duration of illness is lessened
|
Most common tumour of hea is: March 2012
|
openlifescienceai/medmcqa
|
[
"Myxoma",
"Secondaries",
"Papillary fibroelastoma",
"Rhabdomyomas"
] |
B
|
Ans: B i.e. SecondariesTumours of heaMyxoma are the most common primary tumour of the hea in adultsPrimary tumours of the hea are rare; in contrast, metastatic tumours to the hea occurs in about 5% of persons dying of cancerPapillary fibroelastoma are curious, usually incidental, sea anemone like lesions, most often identified at autopsyRhabdomyomas are the most common frequent primary tumour of the hea in infants and children and are frequently discovered in the first years of life
|
What type of pollution results from the contaminants that enter a waterway or water body through a single site?
|
allenai/sciq
|
[
"point source pollution",
"simple source pollution",
"targeted source pollution",
"liquid source pollution"
] |
A
|
Point source pollution results from the contaminants that enter a waterway or water body through a single site. Examples of this include untreated sewage, wastewater from a sewage treatment plant, and leaking underground tanks.
|
How does too much fishing in an area affect its ecosystem?
|
allenai/ai2_arc
|
[
"The fish will lay many more eggs to replace the fish that were caught.",
"Organisms that eat the fish could become endangered due to starvation.",
"Organisms that the fish eat will become endangered.",
"People could eat too many fish and become ill.."
] |
B
| |
What happens at the boiling point of a substance?
|
allenai/ai2_arc
|
[
"liquid becomes a gas",
"solid becomes a gas",
"liquid becomes a solid",
"solid becomes a liquid"
] |
A
| |
What is it called when organisms with traits that better enable them to adapt to their environment tend to survive and reproduce in greater numbers?
|
allenai/sciq
|
[
"evolution",
"adaptation",
"natural distribution",
"natural selection"
] |
D
|
New species develop naturally through the process of natural selection . Due to natural selection, organisms with traits that better enable them to adapt to their environment will tend to survive and reproduce in greater numbers. Natural selection causes beneficial heritable traits to become more common in a population and unfavorable heritable traits to become less common. For example, a giraffe’s neck is beneficial because it allows the giraffe to reach leaves high in trees. Natural selection caused this beneficial trait to become more common than short necks.
|
Which of the following is not gram-positive?
|
openlifescienceai/medmcqa
|
[
"Listeria",
"Moraxella",
"Nocardia",
"Actinomycetes"
] |
B
|
Cocci are mostly gram positive except Bacilli are mostly gram negative except -meningococci -gonococci -veilonella -MORAXELLA M- Mycobacrerium A-Anthracis bacillus C-Clostridium species D-Diptheriae cornybacterium o N Nocardia A Actinomycetes L -Listeria D -Diptherioids s
|
Suppose we have a zakomar network in a neural network architecture, specifically designed for unsupervised learning. If \"zakomar\" refers to a type of clustering method based on graph theory, which commonly used clustering technique does it most resemble?
|
mvujas/stem_mcqa_questions
|
[
"K-means clustering",
"Spectral clustering",
"Hierarchical clustering",
"DBSCAN"
] |
B
|
Zakomar networks, as described, employ graph theory-based methods for clustering. Spectral clustering is a technique that utilizes the eigenvalues of a similarity matrix derived from a graph representation of the data. This makes it closely related to graph theory, as it focuses on partitioning the graph based on its spectral properties. On the other hand, K-means clustering, hierarchical clustering, and DBSCAN use different approaches and do not predominantly rely on graph theoretical foundations.
|
What is one factor that contributes to seasons occurring in New York State?
|
allenai/ai2_arc
|
[
"the revolution of the Moon around Earth",
"the tilt of Earth on its axis",
"the rising and falling of ocean tides",
"the distance of Earth from the Sun"
] |
B
| |
Gothic arch tracing:
|
openlifescienceai/medmcqa
|
[
"Intraoral tracing device",
"Extraoral tracing device",
"Records centric relation and the movements of mandible in horizontal plane",
"Records centric occlusion and the movements of mandible in vertical plane"
] |
C
|
Gothic arch tracing (arrowhead tracing) is a graphical method of recording centric relation in a horizontal plane. It can be done using intraoral or extraoral tracers.
|
Suppose \( f: (X, \mathcal{A}) \to (Y, \mathcal{B}) \) is a mapping between measurable spaces. Which of the following conditions must be satisfied for \( f \) to be considered a measurable mapping?
|
mvujas/stem_mcqa_questions
|
[
"For every \\( A \\in \\mathcal{A} \\), \\( f^{-1}(A) \\in \\mathcal{B} \\).",
"For every \\( B \\in \\mathcal{B} \\), \\( f^{-1}(B) \\in \\mathcal{A} \\).",
"\\( f \\) must be continuous on \\( X \\).",
"The preimage of every open set under \\( f \\) must be in \\( \\mathcal{A} \\)."
] |
B
|
A mapping \( f \) between measurable spaces \( (X, \mathcal{A}) \) and \( (Y, \mathcal{B}) \) is defined as measurable if the preimage of every set in the \u03c3-algebra \( \mathcal{B} \) under \( f \) is a set in the \u03c3-algebra \( \mathcal{A} \). This means that for any set in the target measurable space \( (Y, \mathcal{B}) \), its preimage in the domain measurable space \( (X, \mathcal{A}) \) is measurable with respect to \( \mathcal{A} \).
|
In mathematical chemistry, the energy of a molecular system can often be described using quantum chemistry methods such as Hartree-Fock (HF) theory. Suppose we have a Hamiltonian operator \( \hat{H} \) and a wave function \( \Psi \). One of the fundamental equations governing the HF method is the Hartree-Fock-Roothaan equation. Which of the following best describes the form of the Hartree-Fock-Roothaan equation?
|
mvujas/stem_mcqa_questions
|
[
"\\( \\hat{H} \\Psi = E \\Psi \\)",
"\\( \\mathbf{F} \\mathbf{C} = \\mathbf{S} \\mathbf{C} \\mathbf{E} \\)",
"\\( \\\nabla^2 \\Psi + V \\Psi = E \\Psi \\)",
"\\( \\mathbf{H} \\mathbf{C} = \\mathbf{E} \\mathbf{C} \\)"
] |
B
|
In Hartree-Fock theory, the Roothaan equations are the result of combining the self-consistent field (SCF) method with a basis set expansion of molecular orbitals. This approach leads to a matrix eigenvalue problem rather than a differential equation in continuous space. The Fock matrix \( \mathbf{F} \), representing the Hamiltonian in the SCF method, is related to the overlap matrix \( \mathbf{S} \) and the coefficient matrix \( \mathbf{C} \) which transforms the basis set functions into molecular orbitals. The eigenvalue matrix \( \mathbf{E} \) contains the orbital energies.
|
Where would a duck like to live?
|
allenai/openbookqa
|
[
"the Sahara",
"Antarctica",
"the Appalachian mountains",
"Death Valley"
] |
C
| |
What is the sum of the first 15 terms of an A.P whose 11 th and 7 th terms are 5.25 and 3.25 respectively
|
deepmind/aqua_rat
|
[
"56.25",
"60",
"52.5",
"5.25"
] |
A
|
a +10d = 5.25, a+6d = 3.25, 4d = 2, d = ½
a +5 = 5.25, a = 0.25 = ¼, s 15 = 15/2 ( 2 * ¼ + 14 * ½ )
= 15/2 (1/2 +14/2 ) = 15/2 *15/2 =225/ 4 = 56.25
ANSWER:A
|
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