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math_qa
mathqa_03_00310
if a is thrice as fast as b and together can do a work in 24 days . in how many days a alone can do the work ?
[ "36", "42", "28", "32" ]
D
"a ’ s one day ’ s work = 1 / x b ’ s one day ’ s work = 1 / 3 x a + b ’ s one day ’ s work = 1 / x + 1 / 3 x = 1 / 24 = 3 + 1 / 3 x = 4 / 3 x = 1 / 24 x = 24 * 4 / 3 = 32 answer : d"
math_qa
mathqa_03_00862
find the area of a parallelogram with base 14 cm and height 24 cm .
[ "336", "384", "345", "244" ]
A
"area of a parallelogram = base * height = 14 * 24 = 336 cm 2 answer : option a"
sciq
sciq_01_10324
Particles of matter have the most definite shape in what material state?
[ "plasma", "gas", "liquid", "solid" ]
D
sciq
sciq_01_05561
What is the liquid inside the central vacuole called?
[ "osmotic fluid", "cytoplasm", "cell sap", "chloroplasm" ]
C
The central vacuole contains large amounts of a liquid called cell sap, which differs in composition to the cell cytosol. Cell sap is a mixture of water, enzymes, ions, salts, and other substances. Cell sap may also contain toxic byproducts that have been removed from the cytosol. Toxins in the vacuole may help to prot...
sciq
sciq_01_05889
What happens between particles with opposite charges?
[ "they repel", "they become static", "they attract", "they oppose" ]
C
When charged particles are close enough to exert force on each other, their electric fields interact. Particles with opposite charges attract each other. Particles with like charges repel each other.
math_qa
mathqa_03_02380
two pipes p and q can fill a cistern in 12 and 10 minutes respectively . both are opened together , but at the end of 3 minutes the first is turned off . how much longer will the cistern take to fill ?
[ "1 / 8", "1 / 2", "2 / 4", "1 / 4" ]
B
"3 / 12 + x / 10 = 1 x = 8 1 / 2 answer : b"
sciq
sciq_01_10348
If you drive or take the bus to school or work, you are using a vehicle that probably burns gasoline, a material that burns fairly easily and provides energy to power the vehicle. recall that burning is a?
[ "physical change", "temperature change", "energy change", "chemical change" ]
D
If you drive or take the bus to school or work, you are using a vehicle that probably burns gasoline, a material that burns fairly easily and provides energy to power the vehicle. Recall that burning is a chemical change.
math_qa
mathqa_03_02200
the contents of a certain box consist of 48 apples and 30 kiwis . how many kiwis must be added to the box so that exactly 30 % of the pieces of fruit in the box will be apples ?
[ "90", "72", "82", "54" ]
C
"apple = ( apple + kiwi + x ) * 0.3 48 = ( 30 + 48 + x ) * 0.3 x = 82 answer : c"
medmcqa
medmcqa_05_01676
Antigenic drift is commonly seen in:
[ "Influenza B", "H . influenza", "Influenza A virus", "Influenza C" ]
C
Influenza A virus
sciq
sciq_01_04347
What prepares the body for fight or flight during emergencies?
[ "metabolic response", "abnormal division", "sympathetic division", "adrenal mechanism" ]
C
The sympathetic division controls internal organs and glands during emergencies. It prepares the body for fight or flight ( Figure below ). For example, it increases the heart rate and the flow of blood to the legs, so you can run away from danger.
openbookqa
obqa_02_01593
What orbits the earth 13 times per year?
[ "night illuminator", "clouds", "oceans", "moon pictures" ]
A
the moon orbiting the Earth approximately occurs 13 times per year
medmcqa
medmcqa_05_00672
A man takes peanut and develop stridor, neck swelling, tongue swelling and hoarseness of voice. Most probable diagnosis is -
[ "Foreign body bronchus", "Parapharyngeal abscess", "Foreign body larynx", "Angioneurotic edema" ]
D
Angioedema is an area of swelling of the lower layer of skin and tissue just under the skin or mucous membranesThe swelling may occur in the face, tongue, larynx, abdomen, or arms and legs.Often it is associated with hives, which are swelling within the upper skin.Onset is typically over minutes to hours The underlying...
sciq
sciq_01_10298
What do you call the light particles that travel through the radiative zone?
[ "neutrons", "photons", "electrons", "ions" ]
B
The radiative zone is the next layer out. It has a temperature of about 4 million degrees C. Energy from the core travels through the radiative zone. The rate the energy travels is extremely slow. Light particles, called photons, can only travel a few millimeters before they hit another particle. The particles are abso...
medmcqa
medmcqa_05_04427
Probenecid interacts with ?
[ "Streptomycin", "Ampicillin", "Vancomycin", "Erythromycin" ]
B
Ans. is 'b' i.e., Ampicillin Interactions of probenecid Probenecid inhibits urinary excretion of penicillins, cephalosporins, methotrexate, sulfonamides and indomethacin. It inhibits biliary excretion of rifampicin. Salicylates block uricosuric action of probenecid. Probenecid inhibits tubular secretion of nitrofuranto...
sciq
sciq_01_08050
What structures receive blood from the atria and pump it out of the heart?
[ "muscles", "Vascular Fibers", "ventricles", "valves" ]
C
The bottom two chambers of the heart are called the left and right ventricles. The ventricles receive blood from the atria and pump it out of the heart, either to the lungs or to the rest of the body.
sciq
sciq_01_08882
A major diversification of what animal group occurred about 50 million years ago, possibly spurred by worldwide climate change?
[ "insects", "mammals", "reptiles", "amphibians" ]
B
The supertree also shows that another major diversification of mammals occurred about 50 million years ago. Again, worldwide climate change may have been one reason. This time Earth’s temperature rose. The warmer temperature led to a greater diversity of plants. This would have meant more food for mammals or their prey...
openbookqa
obqa_02_00285
If your pet bird is having trouble flying
[ "lock them in their cage more", "give up and get a new bird", "try putting them on a diet", "take away all their perches" ]
C
as the weight of an animal decreases , that animal will fly more easily
math_qa
mathqa_03_00415
there are 14 players in a chess group , and each player plays each of the others once . given that each game is played by two players , how many total games will be played ?
[ "91", "30", "45", "60" ]
A
"10 players are there . two players play one game with one another . so 14 c 2 = 14 * 13 / 2 = 91 so option a is correct"
ARC-Challenge
arc_04_02638
An appliance manufacturer has redesigned its original electrical fan. It has made the new fan more energy efficient. This means that the new fan
[ "converts more electricity into heat.", "spins at a slower rate than the original fan.", "requires more electricity than the original fan.", "reduces the percentage of heat lost to the atmosphere." ]
D
null
math_qa
mathqa_03_00035
rs . 200 amounts to rs . 800 in 8 years at simple interest . if the interest is increased by 5 % , it would amount to how much ?
[ "520", "440", "260", "280" ]
D
"( 200 * 5 * 8 ) / 100 = 80 200 + 80 = 280 answer : d"
medmcqa
medmcqa_05_04821
Approach to Caldwell Luc operation is ?
[ "Hard palate", "Sublabial sulcus", "Inferior metus", "Superior meatus" ]
B
Ans. is'b'i.e., Sublabial sulcus[Rel Dhingra Sh/ep. 422)Caldwell-Luc operation is a process of opening the maxillary antrum through canine fossa by sublabial approach and dealing with the pathology inside the antrum.
openbookqa
obqa_02_03856
if a salmon visits the site of its birth, what could be the reason for that?
[ "it is coming to have its own offspring", "it is coming home to die", "it is coming to see its father", "it is coming to visit its mom" ]
A
An example of a reproductive behavior is salmon returning to their birthplace to lay their eggs
medmcqa
medmcqa_05_04347
Inability to suck on a straw may indicate lesion of which nerve?
[ "II", "V", "VII", "IX" ]
C
The orbicularis oris muscle encircles the opening of the mouth and helps to bring the lips together to keep the mouth closed. Pursing of mouth is due to orbicularis oris inseed into lips and angle of mouth supplied by VII nerve.The muscles of facial expression are innervated by branches of the facial nerve (VII). After...
openbookqa
obqa_02_03875
To have energy that will last your whole life you'd buy a
[ "car battery", "loaf of bread", "turbine", "tank of gas" ]
C
wind is a renewable resource
math_qa
mathqa_03_01963
after decreasing 20 % in the price of an article costs rs . 600 . find the actual cost of an article ?
[ "775", "620", "53", "530" ]
A
"cp * ( 80 / 100 ) = 600 cp = 7.75 * 100 = > cp = 775 answer : a"
ARC-Challenge
arc_04_03100
Use the information to answer the question. Over the last 150 years, the use of fossil fuels has increased, resulting in more carbon dioxide and other greenhouse gases in the atmosphere. Some scientists think that these atmospheric gases will result in global warming. Scientists have recorded data on global temperature...
[ "loss of shore land", "erosion of mountains", "decrease in average temperature", "increase in the size of the polar ice caps" ]
A
null
ARC-Easy
arc_04_01503
In order for rocks to be classified as igneous, the rocks must
[ "solidify at the surface of Earth.", "be eroded and deposited in layers.", "be formed from magma.", "change form when pressure is applied." ]
C
null
math_qa
mathqa_03_02517
if x + y = - 4 , and x = 6 / y , what is the value of x ^ 2 + y ^ 2 ?
[ "10", "15", "6", "4" ]
D
x ^ 2 + y ^ 2 should make you think of these formulas : ( x + y ) ( x + y ) = x ^ 2 + y ^ 2 + 2 xy we already know ( x + y ) = - 4 and x * y = 6 ( x + y ) ( x + y ) = ( - 4 ) ( - 4 ) = x ^ 2 + y ^ 2 + 2 * ( 6 ) x ^ 2 + y ^ 2 = 16 - 12 = 4 answer : d
sciq
sciq_01_06333
Some membrane proteins that actively transport ions contribute to what?
[ "organism potential", "cellular potential", "membrane potential", "protein potential" ]
C
openbookqa
obqa_02_01416
In order to see water evaporate you could
[ "make pasta", "clean the windows", "drink water", "dry your hair" ]
A
evaporation is a stage in the water cycle process
ARC-Challenge
arc_04_02998
Which behavior of a dog is the best example of a learned behavior?
[ "barking", "tail-wagging", "digging a hole", "coming when called" ]
D
null
sciq
sciq_01_04558
What neutralizes the acidity of chyme and acts as a buffer?
[ "the small intestine", "the bicarbonate", "bile", "the chloride" ]
B
sciq
sciq_01_03796
The point in the titration at which an indicator changes color is called what?
[ "chromatic point", "end point", "tipping point", "zeta point" ]
B
Acid–Base Titrations Because most common acids and bases are not intensely colored, a small amount of an acid– base indicator is usually added to detect the equivalence point in an acid–base titration. The point in the titration at which an indicator changes color is called theendpoint. The procedure is illustrated in ...
ARC-Easy
arc_04_01814
Scientists measured the patterns of spectral lines given off by distant galaxies and concluded that almost all of these galaxies are moving away from Earth. What did the scientists observe directly?
[ "a shift toward longer wavelengths of light", "a shift toward shorter wavelengths of light", "the absence of wavelengths in the visible light range", "the compression of wavelengths in the visible light range" ]
A
null
openbookqa
obqa_02_04659
Depending on the type of bird, it could have different what when compared to another bird
[ "restaurant", "nothing", "space", "sustenance preferences" ]
D
birds with beaks of different shapes eat different foods
medmcqa
medmcqa_05_01508
Most common site of osteogenic sarcoma is -
[ "Femur, upper end", "Femur, lower end", "Tibia, upper", "Tibia, lower end" ]
B
The most common site of involvement is metaphysis of long bone around knee : - Lower end of femur (45%). Upper end of Tibia (25%)
medmcqa
medmcqa_05_01055
After initiation of DOTS therapy for category-I, first sputum examination is done at: March 2010
[ "1 month of treatment", "2 months of treatment", "4 months of treatment", "6 months of treatment" ]
B
Ans. B: 2 months of treatment The treatment in Category I consists of an intensive phase of H, R, Z and E administered under a direct supervision thrice weekly on alternate days for 2 months, followed by a continuation phase of H and R thrice weekly on alternate days for 4 months In the Category 1 follow-up, sputum exa...
openbookqa
obqa_02_02188
When liquid that was sucked out of the ground by flora moves is moved to the air this is called
[ "perspiration", "hydration", "condensation", "transpiration" ]
D
transpiration is when water vapor moves from leaves into the atmosphere
math_qa
mathqa_03_00009
a jogger running at 9 km / hr along side a railway track is 240 m ahead of the engine of a 130 m long train running at 45 km / hr in the same direction . in how much time will the train pass the jogger ?
[ "28 sec", "16 sec", "37 sec", "18 sec" ]
C
"speed of train relative to jogger = 45 - 9 = 36 km / hr . = 36 * 5 / 18 = 10 m / sec . distance to be covered = 240 + 120 = 370 m . time taken = 370 / 10 = 37 sec . answer : c"
openbookqa
obqa_02_01007
if you see little wet spots on your windshield, what might have happened?
[ "the sun is setting", "vapor transformed into droplets", "the moon is rising", "the windshield is dissolving" ]
B
beads of water are formed by water vapor condensing
openbookqa
obqa_02_01665
Solar energy is adsorbed by
[ "planted flowers under the moonlight", "potted flowers in a windowless room", "planted flowers on a bright, clear day", "seeds that have just been planted in the ground" ]
C
if something is in the sunlight then that something will absorb solar energy
ARC-Challenge
arc_04_03130
The presence of high temperatures during fossil-fuel formation results in a higher percentage of which product?
[ "tar", "coal", "crude oil", "natural gas" ]
D
null
math_qa
mathqa_03_00512
a , b , c and d enter into partnership . a subscribes 1 / 3 of the capital b 1 / 4 , c 1 / 5 and d the rest . how much share did a get in a profit of rs . 2475 ?
[ "s . 800", "s . 810", "s . 825", "s . 900" ]
C
"2475 * 1 / 3 = 825 option c"
ARC-Easy
arc_04_01453
Isabel goes jogging for two miles on a sunny afternoon. At the end of her run, she is warmer. As Isabel jogs, which function does the skin perform to help stabilize her body temperature?
[ "Her skin exchanges oxygen and carbon dioxide.", "Her skin produces red blood cells.", "Her skin releases hormones.", "Her skin discharges water." ]
D
null
sciq
sciq_01_10815
What system of the body is responsible for producing hormones?
[ "endocrine system", "nervous system", "regulatory system", "homeostasis system" ]
A
The blood also carries hormones, which are chemical messenger molecules produced by organs of the endocrine system, through your body. Hormones are produced in one area of your body and have an effect on another area. To get to that other area, they must travel through your blood. An example is the hormone adrenaline, ...
sciq
sciq_01_08651
Catecholamines are a class of amine hormones synthesised form which amino acid?
[ "tyrosine", "dopamine", "epinephrine", "phenylalanine" ]
A
ARC-Easy
arc_04_02126
A car skids along the road and smoke appears to be coming from under the tires. The heat that produces the smoke is caused by
[ "magnetism", "sound", "light", "friction" ]
D
null
medmcqa
medmcqa_05_02773
Gel filtration chromatography separates proteins based on
[ "Polarity", "Hydrophobicity", "Stokes radius", "pH" ]
C
Gel filtration chromatography separates proteins based on their Stokes radius, the radius of the sphere they occupy as they tumble in solution. The Stokes radius is a function of molecular mass and shape. When rapidly tumbling, an elongated protein occupies a larger effective volume than a spherical protein of the same...
medmcqa
medmcqa_05_03964
Symptoms of carbon monoxide poisoning stas when the concentration is -
[ "<10%", ">10%", ">20%", ">40%" ]
B
% of CoHb Clinical features 0 - 10 No symptoms 10 - 20 Tightness across forehead Slight headache Dilatation of cutaneous blood vessels 20 - 30 Headache Throbbing in temples 30 - 40 Severe headache Weakness Dizziness Dimness of vision Nausea and vomiting Collapse 40 - 50 Same as above plus greater possibility of collaps...
math_qa
mathqa_03_03545
triangle atriangle b are similar triangles with areas 1536 units square and 1734 units square respectively . the ratio of there corresponding height would be
[ "9 : 10", "17 : 19", "23 : 27", "16 : 17" ]
D
"let x be the height of triangle a and y be the height of triangle of b . since triangles are similar , ratio of area of a and b is in the ratio of x ^ 2 / y ^ 2 therefore , ( x ^ 2 / y ^ 2 ) = 1536 / 1734 ( x ^ 2 / y ^ 2 ) = ( 16 * 16 * 6 ) / ( 17 * 17 * 7 ) ( x ^ 2 / y ^ 2 ) = 16 ^ 2 / 17 ^ 2 x / y = 16 / 17 ans = d"
medmcqa
medmcqa_05_02559
Drug of choice for infantile spasms in a patient with tuberous scleosis is -
[ "Vigabatrin", "Tiagabine", "Lamotrigine", "Levetiracetam" ]
A
Ans. is 'a' i.e., Vigabatrin
sciq
sciq_01_02685
What does the human protein cytokine help fight?
[ "mutations", "toxins", "parasites", "infections" ]
D
Bacteria are modified to produce the human protein cytokine. This is a protein that helps fight infections.
openbookqa
obqa_02_03080
If a sunbeam shoots through a rainstorm,
[ "hues show up", "fields are burned", "trees blow up", "mice grow up" ]
A
a rainbow is formed by refraction of light by splitting light into all different colors
math_qa
mathqa_03_00251
in a group of 250 readers who read science fiction or literacy works or both , 180 read science fiction and 88 read literacy works . how many read both science fiction and literacy works ?
[ "268", "180", "150", "18" ]
D
"consider total number of reader n ( s u l ) = 250 people who read science fiction n ( s ) = 180 people who read literacy works n ( l ) = 88 both science fiction and literacy n ( s â ˆ © l ) = ? n ( s u l ) = n ( s ) + n ( l ) - n ( s â ˆ © l ) 250 = 180 + 88 - n ( s â ˆ © l ) n ( s â ˆ © l ) = 268 - 250 n ( s â ˆ © l ...
sciq
sciq_01_01259
For most of a star’s life, hydrogen atoms fuse to form what?
[ "gas atoms", "helium atoms", "neon atoms", "ionic atoms" ]
B
For most of a star’s life, hydrogen atoms fuse to form helium atoms. A star like this is a main sequence star . The hotter a main sequence star is, the brighter it is. A star remains on the main sequence as long as it is fusing hydrogen to form helium.
math_qa
mathqa_03_00771
find the sum of all odd number upto 250 .
[ "15345", "15645", "15625", "15342" ]
C
"explanation : number of odd numbers upto 250 = n / 2 = 250 / 2 = 125 sum of first 125 odd numbers = ( 125 ) 2 = 15625 answer : option c"
ARC-Easy
arc_04_01172
Ella has several wooden blocks. When Ella holds the blocks in her hand, she feels that they are rough. Which term best describes what Ella feels?
[ "a prediction", "a conclusion", "a hypothesis", "an observation" ]
D
null
openbookqa
obqa_02_03322
How can you help to ensure that you will stay free from becoming ill after eating meat?
[ "cover it with ketchup", "eat it when it's raw", "take the meat from a dead raccoon in the road", "cook it very thoroughly" ]
D
bacteria cause food poisoning
sciq
sciq_01_07210
How many years can dissolved carbon be stored in the deep ocean?
[ "hundreds", "tens", "unknown", "thousands" ]
D
Water erosion by runoff, rivers, and streams dissolves carbon in rocks and carries it to the ocean. Ocean water near the surface dissolves carbon dioxide from the atmosphere. Dissolved carbon may be stored in the deep ocean for thousands of years.
sciq
sciq_01_06243
The earliest cells were called what?
[ "prokaryotes", "eukaryotes", "carbohydrates", "microcytes" ]
A
The first organisms were made of only one cell ( Figure below ). The earliest cells were prokaryotes . Prokaryotic cells are surrounded by a cell membrane, but they do not have a nucleus. The cells got their nutrients directly from the water. The cells needed to use these nutrients to live and grow.
math_qa
mathqa_03_00062
two right circular cylinders of equal volumes have their heights in the ratio 1 : 2 . find the ratio of their radii .
[ "√ 3 : 1'", "√ 7 : 1'", "√ 2 : 1'", "2 : 1'" ]
C
explanation : let their heights be h and 2 h and radii be r and r respectively then . π r 2 h = π r 2 ( 2 h ) = > r 2 / r 2 = 2 h / h = 2 / 1 = > r / r = √ 2 / 1 = > r : r = √ 2 : 1 answer is c
ARC-Easy
arc_04_00161
A student conducts an experiment using a common but potentially harmful bacteria culture. After working with the bacteria, which is the most important safety practice to follow?
[ "turn off any electrical equipment", "dispose of waste materials", "wash hands and tabletops thoroughly", "return materials to their proper place" ]
C
null
sciq
sciq_01_00886
What kind of reactions are involved in processes ranging from the contraction of muscles to the digestion of food?
[ "mineral", "chemical", "liquid", "atomical" ]
B
The rates at which chemical reactions take place in organisms are very important. Chemical reactions in organisms are involved in processes ranging from the contraction of muscles to the digestion of food. For example, when you wave goodbye, it requires repeated contractions of muscles in your arm over a period of a co...
medmcqa
medmcqa_05_02623
'Ring vaccination' is
[ "Given by a ring shaped machine", "Given to produce a ring lesion", "Given around 100 yards of a case detected", "Given around a mile of a case" ]
C
Ring vaccination is a strategy to inhibit the spread of disease by vaccinating only those who are most likely to be infected.
math_qa
mathqa_03_03358
what is the sum of 60 consecutive integers from - 30 inclusive , in a increasing order ?
[ "- 29", "29", "- 30", "30" ]
C
from - 39 to - 1 - - > 30 nos . zero - - > 1 number from + 1 to + 29 - - > 29 nos . when we add up nos . from - 30 to + 29 sum will be - 30 for total 60 numbers . c is the answer .
math_qa
mathqa_03_02651
in the rectangular coordinate system , points ( 5 , 0 ) and ( – 5 , 0 ) both lie on circle c . what is the maximum possible value of the radius of c ?
[ "2", "4", "8", "16" ]
B
"the answer is b it takes 3 distinct points to define a circle . only 2 are given here . the two points essentially identify a single chord of the circle c . since no other information is provided , however , the radius of the circle can essentially be anything . all this information tell us is that the radius isgreate...
math_qa
mathqa_03_01974
the speed at which a man can row a boat in still water is 15 kmph . if he rows downstream , where the speed of current is 3 kmph , what time will he take to cover 80 metres ?
[ "16 seconds", "76 seconds", "26 seconds", "12 seconds" ]
A
"speed of the boat downstream = 15 + 3 = 18 kmph = 18 * 5 / 18 = 5 m / s hence time taken to cover 80 m = 80 / 5 = 16 seconds . answer : a"
math_qa
mathqa_03_01288
pipe p can fill a tank in 3 hours , pipe q in 9 hours and pipe r in 24 hours . if all the pipes are open , in how many hours will the tank be filled ?
[ "2 hours", "2.1 hours", "3 hours", "3.5 hours" ]
B
"explanation : part filled by ( p + q + r ) in 1 hour = ( 1 / 3 + 1 / 9 + 1 / 24 ) = 35 / 72 all the three pipes together will fill the tank = 72 / 35 = 2.1 hours answer b"
ARC-Easy
arc_04_00653
The action of turning off the water while brushing teeth is an example of
[ "recycling.", "adaptation.", "conservation.", "resourcefulness." ]
C
null
openbookqa
obqa_02_03748
A thing that avoids all harm for its entire life will most likely avoid ever experiencing
[ "having a warm shelter", "drinking plenty of water", "being given a meal", "being set on fire" ]
D
fire causes harm to living things
sciq
sciq_01_04462
What is it called when an egg develops into an individual without being fertilized?
[ "symbiosis", "metamorphosis", "abiogenesis", "parthenogenesis" ]
D
Parthenogenesis Parthenogenesis is a form of asexual reproduction in which an egg develops into an individual without being fertilized. The resulting offspring can be either haploid or diploid, depending on the process in the species. Parthenogenesis occurs in invertebrates such as water fleas, rotifers, aphids, stick ...
sciq
sciq_01_10053
What is earth’s geographic north pole also called?
[ "vertical north", "right north", "true north", "mere north" ]
C
A compass needle lines up with Earth’s magnetic north pole. This is different from Earth’s geographic north pole, also called true north. The geographic north pole is the top of an imaginary line. This line is the axis around which Earth rotates. The geographic north pole is much like the spindle of a spinning top. The...
sciq
sciq_01_09445
Mitosis is nuclear division during which duplicated chromosomes are segregated and distributed into what?
[ "father nuclei", "long nuclei", "woman nuclei", "daughter nuclei" ]
D
Figure 6.3 A cell moves through a series of phases in an orderly manner. During interphase, G1 involves cell growth and protein synthesis, the S phase involves DNA replication and the replication of the centrosome, and G2 involves further growth and protein synthesis. The mitotic phase follows interphase. Mitosis is nu...
sciq
sciq_01_09569
What kind of power plant uses energy to heat water that becomes steam and spins turbines?
[ "coal", "nuclear power plants", "wind", "hydroelectric" ]
B
Nuclear power plants use the energy they produce to heat water. The water turns into steam, which causes a turbine to spin. This in turn produces electricity.
math_qa
mathqa_03_01480
if w is the set of all the integers between 49 and 76 , inclusive , that are either multiples of 3 or multiples of 2 or multiples of both , then w contains how many numbers ?
[ "19", "91", "41", "18" ]
A
"official solution : number of multiples of 3 step 1 . subtract the extreme multiples of 3 within the range ( the greatest is 75 , the smallest is 51 ) : 75 - 51 = 24 step 2 . divide by 3 : 24 / 3 = 8 step 3 . add 1 : 8 + 1 = 9 . so there are 9 multiples of 3 within the range : examples are 51 , 54 , 57 , 60 , etc . nu...
sciq
sciq_01_01836
What is the term for how much matter is packed into a given space?
[ "volume", "mass", "opacity", "density" ]
D
Density is a quantity that expresses how much matter is packed into a given space. The amount of matter is its mass, and the space it takes up is its volume. To calculate the density of an object, then, you would use this formula:.
openbookqa
obqa_02_02741
Which of the following relationships is true?
[ "Play-Doh can scratch diamond, therefore it is softer", "Diamond can scratch Play-Doh, therefore Play-Doh is harder", "Diamond can scratch Play-Doh, therefore diamond is harder", "Play-Doh can scratch diamond, therefore it is harder" ]
C
if one mineral can scratch another mineral then that other mineral is softer than that one mineral
medmcqa
medmcqa_05_03243
Heat labile instruments for use in surgical procedures can be best sterilized by?
[ "Absolute alcohol", "Ultraviolet rays", "Chlorine releasing compounds", "Ethylene oxide gas" ]
D
ETHYLENE DIOXIDE Its action is due to alkylating the amino, carboxy, hydroxyl and sulphydryl groups in protein molecules. In addition, it reacts with DNA and RNA. It is used as a disinfectant presents potential toxicity to human beings including mutagenicity and carcinogenicity. it diffuses through many types of porous...
medmcqa
medmcqa_05_03751
Rabies virus -
[ "Can be isolated from the blood of infected patients", "Has multiple antigenic types", "Can be transmitted by a dog 4 weeks before the dog becomes noticeably ill", "Produce infection that is almost fatal to humans" ]
D
In case of rabies virus death was considerd inevitable and no serious attempt at treatment was made REF:ANANTHANARYANAN TEXT BOOK OF MICROBIOLOGY 9EDITION PGNO.533
sciq
sciq_01_07759
When waves of two different frequencies interfere, what phenomenon occurs?
[ "making", "beating", "soaking", "opening" ]
B
When waves of two different frequencies interfere, a phenomenon known as beating occurs. The frequency of a beat is the difference of the two frequencies.
ARC-Challenge
arc_04_02801
Which of the following structures is not present in animal cells?
[ "cell membrane", "cell wall", "mitochondrion", "nucleus" ]
B
null
medmcqa
medmcqa_05_04330
When water enters eyes, blurring of vision due to?
[ "Elemination of refraction through cornea", "Extra refraction through water", "Impurities of water", "Speed of light is more through water" ]
A
Elemination of refraction through cornea REF: The cornea: transactions of the World Congress on the Cornea III: Volume 1987 by H. Dwight Cavanagh page 175, The sensory physiology of aquatic mammals by Aleksandr Iakovlevich Supin, Vladimir V. Popov, Alla Mikha-lovna Mass page 232 "Corneal refractive power is substantial...
sciq
sciq_01_02607
The existence of what tiny, fundamental particles of matter was first proposed in the 1960s?
[ "molecules", "quarks", "atoms", "neutrons" ]
B
The existence of quarks was first proposed in the 1960s. Since then, scientists have done experiments to show that quarks really do exist. In fact, they have identified six different types of quarks. However, much remains to be learned about these tiny, fundamental particles of matter. They are very difficult and expen...
medmcqa
medmcqa_05_00381
F body is
[ "Y chromatin", "X chromatin", "Chromosome 1", "Chromosome 21" ]
A
Ans. (a) Y chromatin(Ref: Emery Genetics)Quinacrine, a fluorescence dye, binds strongly to the Y chromosome forming a bright fluorescent spot (F body). This is clearly visible in stained interphase cells from various tissues from the human male and in mature spermatozoa
sciq
sciq_01_11129
When the ph of precipitation is lowered because of air pollution, what results?
[ "climate change", "sleet", "acid rain", "abnormal rain" ]
C
All life relies on a relatively narrow range of pH, or acidity. That’s because protein structure and function are very sensitive to pH. Air pollution can cause precipitation to become acidic. Nitrogen and sulfur oxides, mainly from motor vehicle exhaust and coal burning, create acids when they combine with water in the...
sciq
sciq_01_02407
The stability of an ecosystem depends on the actions of what, exemplified by mushrooms on a decaying log and bacteria in soil?
[ "fluxes", "aphids", "whitefly", "decomposers" ]
D
The stability of an ecosystem depends on the actions of the decomposers. Examples of decomposers include mushrooms on a decaying log. Bacteria in the soil are also decomposers. Imagine what would happen if there were no decomposers. Wastes and the remains of dead organisms would pile up and the nutrients within the was...
sciq
sciq_01_11353
What type of coal is formed at lower temperatures?
[ "clean", "calcareous", "limestones", "bituminous" ]
D
Coal has different grades. Bituminous coal forms at lower temperatures. It contains a lot of sulfur. When it is burned, it causes a lot of pollution. Anthracite coal forms under higher temperatures. This drives off the sulfur, and the coal burns more cleanly.
ARC-Challenge
arc_04_02532
Which action most often causes sinkholes to form on the surface of Earth?
[ "removing groundwater", "meteor impacts", "plates colliding", "mechanical weathering" ]
A
null
sciq
sciq_01_11546
What are the two most common causes of diseases?
[ "bacteria and protazoa", "viruses and protazoa", "nutritional deficiencies", "bacteria and viruses" ]
D
Today most people realize that microorganisms, such as bacteria or viruses, are the cause of disease. This concept is known as the germ theory of disease, one of the few scientific theories in the field of the life sciences. Although it seems obvious now, people did not always understand the cause of disease. How does ...
openbookqa
obqa_02_03179
Iron can be found on
[ "rocky areas", "ants", "wizards", "unicorns" ]
A
rocks sometimes contain iron
medmcqa
medmcqa_05_02524
Orange peel appearance is a radiographic feature of:
[ "Hyperparathyroidism", "Ossifying fibroma", "Osteogenic sarcoma", "Multilocular cyst" ]
A
Kajodkar-379 Typical radiographic description of various oral lesions as seen on the radiograph:
medmcqa
medmcqa_05_00144
Motorcyclist's fracture:
[ "Ring fracture", "Comminuted fracture", "Separation of suture between anterior and posterior half of skull.", "Fracture base of skull" ]
A
A. i.e. Ring fracture: Motorcyclist's fracture is a ring fracture of skull baseQ, separating the rim of foramen magnum from rest of the base. It usually results due to sudden anteroflexion of cervical spine without impact on occiput caused usually by veical deceleration injury (fall from height) or rarely motorcycle ac...
sciq
sciq_01_11424
When does the diploid zygote form?
[ "before the pollen tube", "never", "before the haploid zygote", "after the pollen tube" ]
D
Chapter 26 1 Figure 26.8 B. The diploid zygote forms after the pollen tube has finished forming, so that the male generative nuclei can fuse with the female gametophyte. 3 D 5 C 7 A 9 B 11 C 13 B 15 C 17 D 19 Both pollination and herbivory contributed to diversity, with plants needing to attract some insects and repel ...
openbookqa
obqa_02_03755
wildfire that is passed through the tree tops are dangerous, why?
[ "it changes at the tip of a hat", "it has magic powers", "it creates a blackhole to suck up Earth", "it has the power to travel in time" ]
A
drought may cause wildfires
math_qa
mathqa_03_03225
if n is a positive integer and n ^ 2 is divisible by 72 , then the largest positive integer that must divide n is
[ "6", "12", "24", "36" ]
B
"possible values of n = 12 , 24 , 36 and 48 . but it is 12 that can divide all the possible values of n . if we consider 48 , it will not divide 12 , 24 and 36 . hence , 12 is the value that must divide n . answer : b"
openbookqa
obqa_02_02899
The desert rat has evolved traits that help it live with low supplies of water, what is this an example of?
[ "acquired heuristics", "acquired characteristics", "acquired interests", "acquired statistics" ]
B
the condition of the parts of an organism are acquired characteristics
ARC-Challenge
arc_04_02230
A flowing stream contains water at 18°C. Cans of soft drinks at 28°C are lowered into the stream. Which of the following will most likely occur?
[ "The soft drink cans will absorb cold energy from the stream's water.", "The cans will cool until their temperature is the same as the stream's.", "The temperature of the soft drinks will not change since the cans are sealed.", "The temperature of the cans will decrease to freezing as long as the stream is fl...
B
null
math_qa
mathqa_03_01996
we define that k @ j is the product of j number from k in increasing order for positive integers k , j . for example , 6 @ 4 = 6 * 7 * 8 * 9 . if a = 2020 and b = 2120 , what is the value w of the ratio a / b ?
[ "1 / 2", "1 / 3", "2 / 3", "1 / 4" ]
A
"w - > a / b = 20 * 21 * … … * 39 / 21 * 22 * … . * 39 * 40 = 20 / 40 = 1 / 2 . therefore , the answer is a ."
math_qa
mathqa_03_03802
a circle is inscribed in a triangle of side 6 cm . and a square is inscribed in the circle . what is the area of square ?
[ "4 cm ^ 2'", "6 cm ^ 2'", "5 cm ^ 2'", "7 cm ^ 2'" ]
B
the radius of the incircle in a equilateral triangle is a / 2 ( sqrt ) 3 where a = side of triangle = 6 cm so the diameter of the circle would be the diagonal of square so diagonal = 2 * a / 2 ( sqrt ) 3 = a / ( sqrt ) 3 so area of square = 1 / 2 * ( diagonal ) ^ 2 = 6 * 6 / 2 * 3 = 6 cm ^ 2 answer : b
sciq
sciq_01_09467
Name the virus that causes cold sores.
[ "herpes virus", "eboli", "AIDS", "Epstein-Barr" ]
A
Metju12. Cold sores are caused by a herpes virus . Public Domain.