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sciq
sciq_01_02100
Involved in balance, the semicircular canals are parts of what organs?
[ "eyes", "ears", "lungs", "ovaries" ]
B
The parts of the ears involved in balance are the semicircular canals. These are the curved structures above the cochlea in the inner ear in Figure above . Like the cochlea, the semicircular canals contain liquid and are lined with tiny hair cells. As the head changes position, the liquid moves. This causes the hair ce...
sciq
sciq_01_02210
The cells of most eukaryotic and many prokaryotic organisms can carry out what type of respiration?
[ "aerobic", "anaerobic", "kinetic", "energetic" ]
A
sciq
sciq_01_02777
In the human body, what do you call the intersection where the paths for air and food cross.?
[ "pharynx", "larynx", "cloaca", "esophagus" ]
A
openbookqa
obqa_02_02566
Polar bears are best suited for
[ "colder places", "hotter regions", "Jupiter's polar caps", "northern desert regions" ]
A
living in an environment causes an organism to adapt to that environment
ARC-Easy
arc_04_00641
Two processes are involved in the formation of a sand dune. Which two processes best describe how a sand dune forms?
[ "wind erosion then deposition", "plate movement then deposition", "wind erosion then water erosion", "water erosion then plate movement" ]
A
null
math_qa
mathqa_03_03992
a school has 4 maths 3 physics and 3 chemistry teachers each teacher can teach 2 subjects max what is he minimum number of teachers required
[ "4", "5", "6", "7" ]
B
"total subjects = 4 + 3 + 3 = 10 max subjects by 1 teacher = 2 so , min of teachers required = 10 / 2 = 5 answer : b"
sciq
sciq_01_02257
What is the minimum number of pulleys needed for a compound pulley?
[ "4", "2", "1", "zero" ]
B
Single pulleys may be fixed or moveable. Compound pulleys consist of two or more pulleys.
medmcqa
medmcqa_05_02902
Most common extra-cranial complication of ASOM is:
[ "Facial nerve paralysis", "Lateral sinus thrombosis", "Subperiosteal abscess", "Brain abscess" ]
C
Ans. C Subperiosteal abscessAs discussed earlier therelative incidence of various extracranial complications in a case of chronic, otitis media are:Extracranial complicationPercentagePost auricular abscess:Fpcial palsyBezold abscessPetrous apicitis (Petrositis)Meningitis 75620.212 So M/C complication is post auricular ...
openbookqa
obqa_02_00536
Ripping a paper in half
[ "alters the shape of the paper", "leaves the paper unchanged", "enlarges the piece of paper", "makes the paper into its gas form" ]
A
tearing an object changes that object 's shape
medmcqa
medmcqa_05_01347
In rabies, Negri bodies can be detected in: March 2013
[ "Cornea", "Saliva", "Skin", "Neuron" ]
D
Ans. D i.e. Neuron The most characteristic pathologic finding of rabies in the CNS is the formation of cytoplasmic inclusions called 'negri bodies' within neurons. Negri bodies are distributed throughout the brain, paicularly in Ammon's horn, the cerebral coex, the brainstem, the hypothalamus, the Purkinje cells of the...
ARC-Easy
arc_04_00824
Which type of evidence would a geologist need to support plate tectonic theory?
[ "plant fossils that are similar in size", "the weathering and erosion of coastlines", "new crust formed by the sea floor spreading", "rocks with different physical appearances" ]
C
null
math_qa
mathqa_03_02324
alok ordered 16 chapatis , 5 plates of rice , 7 plates of mixed vegetable and 6 ice - cream cups . the cost of each chapati is rs . 6 , that of each plate of rice is rs . 45 and that of mixed vegetable is rs . 70 . the amount that alok paid the cashier was rs . 1051 . find the cost of each ice - cream cup ?
[ "25", "40", "77", "99" ]
B
"let the cost of each ice - cream cup be rs . x 16 ( 6 ) + 5 ( 45 ) + 7 ( 70 ) + 6 ( x ) = 1051 96 + 225 + 490 + 6 x = 1051 6 x = 240 = > x = 40 . answer : b"
medmcqa
medmcqa_05_02684
Biomedical concept of health is based on
[ "Germ theory of disease", "Absence of pain", "Social and psychological factors", "Equilibrium between man and environment" ]
A
The biomedical model of health focuses on purely biological factors and excludes psychological, environmental, and social influences. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 13
medmcqa
medmcqa_05_00793
Drug of choice for paroxysmal supraventricular tachycardia is?
[ "Metoproloi", "Amiodarone", "Adenosine", "Lidocaine" ]
C
ANSWER: (C) AdenosineREF: Harrison's Principles of Internal Medicine 17th ed chapter 226See APPENDIX-40 for "DRUGS USED IN ARRHYTHMIAS" DoseIndicationSide effectsAdenosine6-18 mg (rapid bolus)Terminate reentrant SVT involving AV nodeCough, flushingSVT - SUPRA VENTRICULAR TACHYCARDIA
sciq
sciq_01_02496
What appears in autumn when cool air moves over a warm lake?
[ "misty fog", "steam fog", "feature fog", "movement fog" ]
B
Steam fog appears in autumn when cool air moves over a warm lake. Water evaporates from the lake surface. As the water vapor cools, it condenses. The fog appears like steam.
medmcqa
medmcqa_05_04465
Rheumatoid factor is
[ "IgM Ab against Fc fragment of IgG", "IgG Ab against Fc fragment of IgG", "IgM Ab against Fc fragment of IgA", "IgM Ab against Fc fragment of IgM" ]
A
(A) IgM Ab against Fc fragment of IgG # Rheumatoid factor is a IgM Ab against Fc fregment of IgG.> Serum IgM RF has been found in 75-80% of patients with RA; therefore, a negative result does not exclude the presence of this disease. It is also found in other connective tissue diseases, such as primary Sjogren's syndro...
sciq
sciq_01_02866
In science, what is defined as a change in position?
[ "direction", "gravity", "speed", "motion" ]
D
In science, motion is defined as a change in position. An object’s position is its location. Besides the wings of the hummingbird in the opening image, you can see other examples of motion in the Figure below . In each case, the position of something is changing.
math_qa
mathqa_03_04697
there are 30 balls which are red , blue or green . if 11 balls are green and the sum of red balls and green balls is less than 25 , at most how many red balls are there ?
[ "14", "13", "16", "17" ]
B
"r + g + b = 30 g = 11 r + g < 25 = > r + 11 < 25 = > r < 14 = > at most 13 red balls answer : b"
sciq
sciq_01_04987
Where are most chloroplasts found in plants?
[ "stems", "leaves", "flowers", "roots" ]
B
In plants, most chloroplasts are found in the leaves. Therefore, all the raw materials needed for photosynthesis must be present in the leaves. These materials include light, water, and carbon dioxide. The shape of the leaves gives them a lot of surface area to absorb light for photosynthesis. Roots take up water from ...
sciq
sciq_01_06638
Regulation of endocrine depends on the hypothalmus and what other gland?
[ "adrenal", "pituitary", "salivary", "thyroid" ]
B
45.3 The hypothalamus and pituitary are central to endocrine regulation.
sciq
sciq_01_06441
What are the simplest types of carbon-based compounds?
[ "Cells", "particles", "Microbes", "hydrocarbons" ]
D
Hydrocarbons are compounds that contain only carbon and hydrogen. They are the simplest type of carbon-based compounds.
openbookqa
obqa_02_04799
Self-absorbed people most love
[ "engaging in empathy", "a lake's reflection", "putting others first", "thinking of others" ]
B
when light hits a reflective object , that light bounces off that object
sciq
sciq_01_04521
The complete combustion of alkanes to carbon dioxide is an extremely __________ reaction.
[ "reactive", "hydrolic", "exothermic", "geothermal" ]
C
Each step in the process is either a gain of oxygen or a loss of hydrogen. Each step also releases energy, which explains why the complete combustion of alkanes to carbon dioxide is an extremely exothermic reaction.
math_qa
mathqa_03_02817
george went to a fruit market with certain amount of money . with this money he can buy either 50 oranges or 40 mangoes . he retains 8 % of the money for taxi fare and buys 20 mangoes . how many oranges can he buy ?
[ "21", "30", "20", "16" ]
A
"let the amount of money be 200 let cost of 1 orange be 4 let cost of 1 mango be 5 he decides to retain 8 % of 200 = 16 for taxi fare , so he is left with 184 he buys 20 mangoes ( @ 5 ) so he spends 100 money left is 84 ( 184 - 100 ) no of oranges he can buy = 84 / 4 = > 21 so , george can buy 21 oranges . a"
math_qa
mathqa_03_02349
a can finish a piece of work in 5 days . b can do it in 16 days . they work together for two days and then a goes away . in how many days will b finish the work ?
[ "4", "5", "6", "7" ]
C
"2 / 4 + ( 2 + x ) / 16 = 1 = > x = 6 days answer : c"
openbookqa
obqa_02_02823
An example of electrical energy is
[ "air", "audio speakers", "candles", "grass" ]
B
a light bulb converts electrical energy into light energy when it is turned on
sciq
sciq_01_06040
What structure of a cell is enclosed by a membrane and contains most of the cell’s dna?
[ "nucleus", "epidermis", "vacuole", "ribosome" ]
A
Besides the four parts listed above, many cells also have a nucleus. The nucleus of a cell is a structure enclosed by a membrane that contains most of the cell’s DNA. Cells are classified in two major groups based on whether or not they have a nucleus. The two groups are prokaryotic cells and eukaryotic cells.
medmcqa
medmcqa_05_02779
A 30-yebar old patient presented with features of acute meningoencephalitis in the casualty. His CSF on wet mount microscopy revealed motile unicellular microorganisms. The most likely organism is -
[ "Naegleria fowleri", "Acanthamoeba castellani", "Entamoeba hystolytica", "Trypanosoma cruzi" ]
A
Naegleria fowleri, the only pathogenic species of naegleria Human infection comes from water containing the amoebae and usually follows swimming or diving in ponds. Patients are mostly previously healthy young adults or children. The amoebae invade the nasal mucosa, pass through the olfactory nerve branches in the crib...
medmcqa
medmcqa_05_03428
Which cranial nerve is not transmitted by superior orbital fissure?
[ "2", "3", "4", "5" ]
A
Ans. A 2Ref: Netter's Clinical Anatomy, 3rd ed. pg. 442Structures transmitted via the superior orbital fissure* Cranial nerve III, IV, VI (ophthalmic nerve) and VI* Inferior ophthalmic veinThe optic nerve is transmitted via the optic canal. The optic canal transmits optic nerve, ophthalmic artery and central retinal ve...
ARC-Easy
arc_04_01502
A student performs an experiment and the results are shown below: Before- Iron filings are brown, small, and magnetic: Copper sulfate crystals are blue, brittle, and not magnetic. After- The copper formed was reddish, solid, and not magnetic: Iron sulfide solution was colorless and not magnetic. Which statement support...
[ "Changes in color occurred.", "A new substance was formed.", "A physical change in the iron occurred.", "The original substances were present after." ]
B
null
math_qa
mathqa_03_03611
a can contains a mixture of liquids a and b is the ratio 7 : 5 . when 9 litres of mixture are drawn off and the can is filled with b , the ratio of a and b becomes 7 : 9 . how many liter m of liquid a was contained by the can initially ?
[ "10", "20", "21", "25" ]
C
"as a : b : : 7 : 5 - - - > only option c is a multiple of 7 and hence it is a good place to start . also a : b : : 7 : 5 means that , a = ( 712 ) * total and b = ( 5 / 12 ) * total if a = 21 , b = 15 - - - > remove 9 litres - - - > you remove ( 7 / 12 ) * 9 of a - - - > a remaining = 21 - ( 7 / 12 ) * 9 = 63 / 4 simil...
sciq
sciq_01_01624
Which part of the axon has a higher membrane potential?
[ "canals hillock", "axon hillock", "biofilm hillock", "muscular hillock" ]
B
sciq
sciq_01_01758
Because plants lack what kind of system, their first line of defense is usually the death of cells surrounding infected tissue to prevent spread of infection?
[ "digestion system", "hormones system", "nervous system", "immune system" ]
D
Plants don't have an immune system, but they do respond to disease. Typically, their first line of defense is the death of cells surrounding infected tissue. This prevents the infection from spreading.
ARC-Easy
arc_04_00915
Deer eat different types of plants in an ecosystem. Which method would best show the percentages of the plant types in the deer diet?
[ "pie chart", "bar graph", "line graph", "scatterplot" ]
A
null
openbookqa
obqa_02_02700
Where do grass snakes live?
[ "icebergs", "a field", "grass fed cattle", "amphibians on Uranus" ]
B
grass snakes live in grass
medmcqa
medmcqa_05_01043
Which of the following is a scotochromogen?
[ "M.fouitum", "M.kansasii", "M.ulcerans", "M.scrofulaceum" ]
D
The organisms which produce the pigment chiefly in the dark are called scotochromogens. M. scrofulaceum causes scrofula, a granulomatous cervical adenitis, usually in children. (M. tuberculosis also causes scrofula.) The organism enters through the oropharynx and infects the draining lymph nodes. Its natural habitat is...
sciq
sciq_01_01169
An ammeter must be connected in series with what to allow it to accurately measure the current flow without causing any disruptions?
[ "resistors", "insulators", "configurations", "capacitors" ]
A
An ammeter measures the current traveling through the circuit. They are designed to be connected to the circuit in series, and have an extremely low resistance. If an ammeter were connected in parallel, all of the current would go through the ammeter and very little through any other resistor. As such, it is necessary ...
openbookqa
obqa_02_03326
Once the egg has hatched a swan has given birth to
[ "a chick", "a rock", "a human baby", "an egg" ]
A
a mother births offspring
openbookqa
obqa_02_01319
The Earth's topography varies widely from the deepest trenches to the tallest
[ "tales", "trees", "pinnacle", "buildings" ]
C
the surface of the Earth contains mountains
sciq
sciq_01_08843
Fruit-eating bats receive food from plants and, in return, help these plants by doing what?
[ "spreading seeds", "protecting them", "pollinating seeds", "fertilizing them" ]
A
Fruit-eating bats ( Figure below ) also receive food from plants. In return, they help these plants spread their seeds. When bats consume fruit, they also consume the seeds within the fruit. Then they carry the seeds in their guts to far-away locations.
math_qa
mathqa_03_01338
a person x working alone can complete a work in 5 days . a person y completes the same amount of work in 20 days , and a person z when working alone can complete the same amount of work in 30 days . all 3 people work together for 2 days but then x and y leave . how many more days does z need to complete the work after ...
[ "13", "14", "15", "16" ]
A
the fraction of work completed in two days is 2 / 5 + 2 / 20 + 2 / 30 = 17 / 30 the fraction of work remaining is 1 - 17 / 30 = 13 / 30 the number of days required for z is 13 days . the answer is a .
sciq
sciq_01_01985
Some metals, such as gold and platinum, do not corrode easily because they are very resistant to what?
[ "evaporation", "oxidation", "precipitation", "heat" ]
B
Some metals, such as gold and platinum, do not corrode easily because they are very resistant to oxidation by common substances. Some other metals begin to be oxidized, but are further protected from additional corrosion by a coating formed on the surface. Aluminum reacts with oxygen to form aluminum oxide, which remai...
sciq
sciq_01_10778
The kayak’s motion in the water is an example of classical addition of what?
[ "momentum", "acceleration", "velocities", "force" ]
C
If you’ve ever seen a kayak move down a fast-moving river, you know that remaining in the same place would be hard. The river current pulls the kayak along. Pushing the oars back against the water can move the kayak forward in the water, but that only accounts for part of the velocity. The kayak’s motion is an example ...
math_qa
mathqa_03_02040
what is the average of first 21 multiples of 7 ?
[ "67", "69", "77", "79" ]
C
"required average = 7 ( 1 + 2 + . . . . + 21 ) / 21 ( 7 / 21 ) x ( ( 21 x 22 ) / 2 ) ( because sum of first 21 natural numbers ) = 77 c"
ARC-Challenge
arc_04_02274
What is formed when a neutral atom gains an electron?
[ "A mixture", "An iron", "A molecule", "A metal" ]
B
null
sciq
sciq_01_02838
When gas pressure-forces are used to move an object the work is done on the object by?
[ "expanding gas", "kinetic energy", "contracting gas", "gravitational pull" ]
A
When gas pressure-forces are used to move an object then work is done on the object by the expanding gas. Work can be done on the gas in order to compress it.
sciq
sciq_01_04393
What science is the study of the occurrence, distribution, and determinants of health and disease in a population?
[ "epidemiology", "toxicology", "physiology", "histology" ]
A
Epidemiologist Epidemiology is the study of the occurrence, distribution, and determinants of health and disease in a population. It is, therefore, related to public health. An epidemiologist studies the frequency and distribution of diseases within human populations and environments. Epidemiologists collect data about...
sciq
sciq_01_06866
What kind of solids are generally classified by the forces that hold their particles together and include ionic, metallic, covalent network, and molecular types?
[ "distinct solids", "crystalline solids", "flat solids", "helium solids" ]
B
Crystalline solids are generally classified according the nature of the forces that hold its particles together. These forces are primarily responsible for the physical properties exhibited by the bulk solids. The following sections provide descriptions of the major types of crystalline solids: ionic, metallic, covalen...
sciq
sciq_01_07213
Why does ice wedging occur?
[ "water melts", "water expands", "water freezes", "water evaporates" ]
B
Ice wedging happens because water expands as it goes from liquid to solid. When the temperature is warm, water works its way into cracks in rock. When the temperature cools below freezing, the water turns to ice and expands. The ice takes up more space. Over time, this wedges the rock apart. Ice wedging is very effecti...
math_qa
mathqa_03_04248
two cars start from the opposite places of a main road , 150 km apart . first car runs for 25 km and takes a right turn and then runs 15 km . it then turns left and then runs for another 25 km and then takes the direction back to reach the main road . in the mean time , due to minor break down the other car has run onl...
[ "65", "38", "20", "28" ]
A
answer : a ) 65 km
ARC-Easy
arc_04_01759
Which information is used in a station model?
[ "yearly average precipitation", "daily average barometric pressure", "number of lightning strikes", "wind direction in a particular point and time" ]
D
null
sciq
sciq_01_04965
What kind of interactions do polar substances experience?
[ "monopole-monopole interactions", "axial interactions", "monopole-dipole interactions", "dipole-dipole interactions" ]
D
Substances that are polar experience dipole-dipole interactions.
ARC-Easy
arc_04_01309
Planting legumes in order to add nitrogen to soil most likely causes
[ "a decrease in the amount of acid rain.", "an enrichment in the fertility of the soil.", "an increase in the ratio of nitrogen to oxygen in the system.", "a reduction in the soil's ability to manufacture its own nitrogen." ]
B
null
sciq
sciq_01_10259
What is considered the center of the solar system?
[ "sun", "nebulla", "earth", "heat" ]
A
Today we know that we have eight planets, five dwarf planets, over 165 moons, and many, many asteroids and other small objects in our solar system. We also know that the Sun is not the center of the universe. But it is the center of the solar system.
openbookqa
obqa_02_04877
If a large inanimate thing is moving across arctic seas, it is likely
[ "freshwater fish", "oily stones", "hardened dampness", "old sheep" ]
C
a glacier is made of ice
ARC-Challenge
arc_04_02934
One astronomical unit is the average distance between the Earth and the Sun. This unit is most often used to describe the distance between which two objects?
[ "from galaxy to galaxy", "from Saturn to Mercury", "from the Sun to Proxima Centauri", "from the Big Dipper to the Little Dipper" ]
B
null
ARC-Challenge
arc_04_03134
A student poured water into a plastic tray. The student then put the tray into the freezer. What property of the water changed as the water froze?
[ "The water became a gas.", "The mass of water increased.", "The water took a definite shape.", "The flavor of the water changed." ]
C
null
math_qa
mathqa_03_02602
sale of rs 6835 , rs . 9927 , rs . 6855 , rs . 7230 and rs . 6562 for 5 consecutive months . how much sale must he have in the sixth month so that he gets an average sale of rs , 6800 ?
[ "4966", "6791", "2877", "2676" ]
B
"total sale for 5 months = rs . ( 6435 + 6927 + 6855 + 7230 + 6562 ) = rs . 34009 . required sale = rs . [ ( 6800 x 6 ) - 34009 ] = rs . ( 40800 - 34009 ) = rs . 6791 answer : b"
sciq
sciq_01_08730
Rudolf virchow developed the hypothesis that cells only come from other cells in what year?
[ "1848", "1898", "1858", "1868" ]
C
In 1858, after using microscopes much better than Hooke’s first microscope, Rudolf Virchow developed the hypothesis that cells only come from other cells. For example, bacteria, which are single-celled organisms, divide in half (after they grow some) to make new bacteria. In the same way, your body makes new cells by d...
sciq
sciq_01_09579
Some viruses carry a few viral enzyme molecules within their what?
[ "DNA", "plastids", "hormones", "capsids" ]
D
math_qa
mathqa_03_01614
how many digits will be there to the right of the decimal point in the product of 95 and . 02554 ?
[ "6", "7", "4", "5" ]
C
product of 95 and . 02554 is 2.4263 . therefore number of digits to right of decimal point is 4 answer is c .
sciq
sciq_01_02968
How do we describe chemical reactions?
[ "equilibrium", "balanced reactions", "chemical equations", "atomic numbers" ]
C
Chemical reactions are described using chemical equations.
medmcqa
medmcqa_05_01309
A 5-year-old child with watery diarrhea for 7 days, on examination, weight = 10 kg, hanging skin folds with normal skin pinch. The composition of sodium in the ORS should be -
[ "75 meq/Lit", "60 meq/Lit", "45 meq/Lit", "90 meq/Lit" ]
C
Ans- C 45 meq/Lit Ideal Na concentration for dehydration in severe malnutrition is 45 mmol/L Ref 1 - WHO recommendations Children who are under 5 years of age with severe acute malnutrition who present with some dehydration or severe dehydration but who are not shocked should be rehydrated slowly, either orally or by n...
math_qa
mathqa_03_02009
how many positive integers less than 50 have a reminder 01 when divided by 5 ?
[ "10", "14", "15", "16" ]
A
"1 also gives the remainder of 1 when divided by 5 . so , there are total of 10 numbers . answer : a ."
medmcqa
medmcqa_05_00373
Melatonin is derived from-
[ "Tyrosine", "Phenylalanine", "Alanine", "Tryptophan" ]
D
Ans. is 'd' i.e., Tryptophan o Tryptophan is a precursor for synthesis of niacin (nicotinic acid), serotonin and melatonin.Amino acidsBiological important compoundTyrosineCatecholamines (epinephrine, norepinephrine, dopamine), thyroxine, triiodothryonine, melanin.(Note: - Phenylalanine is the precursor of tyrosine, thu...
math_qa
mathqa_03_01529
what will be the vulgar fraction of 0.70
[ "3 / 5", "7 / 10", "3 / 2", "3 / 7" ]
B
"explanation : 0.70 = 70 / 100 = 7 / 10 option b"
sciq
sciq_01_06975
Density is defined as the mass of an object divided by its what?
[ "growth", "volume", "liquid", "size" ]
B
Density is defined as the mass of an object divided by its volume. Propose a unit of density in terms of the fundamental SI units.
sciq
sciq_01_07594
What decides what may enter or leave a cell?
[ "cell wall", "nucleus", "cell membrane", "golgi apparatus" ]
C
The cell membrane also decides what may enter or leave a cell. The membrane is said to be semipermeable or selectively permeable, allowing only certain ions and organic molecules to cross the membrane. The plasma membrane contain many proteins, as well as other lipids called sterols. The proteins have various functions...
sciq
sciq_01_07889
Athletes such as swimmers and bicyclists wear body suits in competition to minimize what forces?
[ "rolling forces", "activity forces", "natural forces", "drag forces" ]
D
5.2 Drag Forces 5. Athletes such as swimmers and bicyclists wear body suits in competition. Formulate a list of pros and cons of such suits. Two expressions were used for the drag force experienced by a moving object in a liquid. One depended upon the speed, while the other was proportional to the square of the speed. ...
sciq
sciq_01_11636
All organisms must adapt to what in order to survive?
[ "weather", "natural", "conditions", "environment" ]
D
All organisms must adapt to their environment in order to survive. This is true whether they live in water or on land. Most environments are not as extreme as the deep ocean where tube worms live. But they all have conditions that require adaptations. In this chapter, you will read about a wide variety of environments ...
sciq
sciq_01_07264
Alterations that change chromosome structure are known as?
[ "deformities", "traits", "mutations", "lesions" ]
C
Chromosomal alterations are mutations that change chromosome structure.
openbookqa
obqa_02_04278
Which of the following is true?
[ "sunlight works best in caves", "fear can fuel motorcycles", "corn can fuel public transit", "rice can never be used as fuel" ]
C
An example of creating an alternative fuel is turning plant material into fuel
sciq
sciq_01_02162
What do tadpoles change into?
[ "toads", "adult frogs", "mud puppies", "reptiles" ]
B
Tadpoles go through many changes to become adult frogs.
sciq
sciq_01_10234
What is the age-related disorder that causes the gradual loss of bone density and strength?
[ "arthritis", "osteoporosis", "mitosis", "fibrosis" ]
B
Figure 7.22 Osteoporosis Osteoporosis is an age-related disorder that causes the gradual loss of bone density and strength. When the thoracic vertebrae are affected, there can be a gradual collapse of the vertebrae. This results in kyphosis, an excessive curvature of the thoracic region.
sciq
sciq_01_02105
The mean free path for a gaseous molecule will be hundreds of times the what of the molecule?
[ "density", "weight", "variation", "diameter" ]
D
If you have ever been in a room when a piping hot pizza was delivered, you have been made aware of the fact that gaseous molecules can quickly spread throughout a room, as evidenced by the pleasant aroma that soon reaches your nose. Although gaseous molecules travel at tremendous speeds (hundreds of meters per second),...
math_qa
mathqa_03_01710
the ratio of efficiency of a is to c is 5 : 3 . the ratio of no . of days taken by b is to c is 2 : 3 . a takes 6 days less than c , when a and c completes the work individually . b and c left the work after 2 days . the no of days taken by a to finish the remaining work ?
[ "4.5", "5", "6", "7" ]
C
a : b : c efficiency 10 : 9 : 6 no of days 9 x : 10 x : 15 x given = > 15 x - 9 x = 6 hence , x = 1 number of days taken by a = 9 and daily work done = 10 number of days taken by b = 10 and daily work done = 9 ( total work = 90 ) number of days taken by c = 15 and daily work done = 6 work done by b and c in initial 2 d...
sciq
sciq_01_10326
High decibel sounds can damage your?
[ "brain", "nose", "ears", "eyes" ]
C
High-decibel sounds can damage the ears and cause loss of hearing. Which sounds in the graph are dangerously loud?.
ARC-Easy
arc_04_00639
When air is heated, it will most likely
[ "expand and fall.", "expand and rise.", "condense and fall.", "condense and rise." ]
B
null
medmcqa
medmcqa_05_01074
CAGE test is used for diagnosis of
[ "Opioid abuse", "Schizophrenia", "Alcoholism", "Paranoid Psychosis" ]
C
CAGE Questionnaire The CAGE questionnaire basically consists of four questions: i. Have you ever had to Cut down on alcohol (amount)? ii. Have you ever been Annoyed by people's criticism of alcoholism? iii. Have you ever felt Guilty about drinking? iv. Have you ever needed an Eye-opener drink (early morning drink)? A s...
openbookqa
obqa_02_03316
A wolf feels the snow with
[ "morality", "skis", "ethics", "touch" ]
D
feeling is when an living thing senses through touch
math_qa
mathqa_03_00392
xy = 1 then what is ( 7 ^ ( x + y ) ^ 2 ) / ( 7 ^ ( x - y ) ^ 2 )
[ "2401", "4", "8", "16" ]
A
"( x + y ) ^ 2 - ( x - y ) ^ 2 ( x + y + x - y ) ( x + y - x + y ) ( 2 x ) ( 2 y ) 4 xy 4 7 ^ 4 = 2401 answer a"
medmcqa
medmcqa_05_03521
The type of radiographic projection given below is:
[ "PA view", "Reverse towne's view", "Submentovertex view", "Waters projection" ]
B
Reverse towne's view Image Receptor and Patient Placement The image receptor is placed in front of the patient, perpendicular to the midsagittal plane and parallel to the coronal plane. The patient’s head is tilted downward so that the canthomeatal line forms a 25-degree to 30 degree angle with the image receptor. To i...
medmcqa
medmcqa_05_00792
Epiphysis involved in which bone tumor -
[ "Osteosarcoma", "Multiple myeloma", "Giant cell tumor", "Ewing's sarcoma" ]
C
Ans. is 'c' i.e., Giant cell tumor o Epiphyseal tumors are : Chondroblastoma. Giant cell tumor (osteoclastoma), Clear cell chondrosaroma.
openbookqa
obqa_02_01203
What is animal competition?
[ "wolves and bears eating salmon", "a shark and marlin swimming fast", "gazelles and zebras living on the plains", "an oxpecker helping a rhino" ]
A
if two animals eat the same prey then those animals compete for that pey
openbookqa
obqa_02_01267
Large Stag that are hunted prefer to live in the
[ "space", "ocean", "desert", "timberland" ]
D
a deer lives in a forest
openbookqa
obqa_02_02197
Which is likeliest to be true?
[ "octopuses are found in the jungle", "birds are found in the deep ocean waters", "sheep are found high in the tree", "seaweed is found in the shallow waters near the beach" ]
D
aquatic plants live in bodies of water
sciq
sciq_01_09017
What is the final stage of cell division in eukaryotes as well as prokaryotes?
[ "cytokinesis", "anaphase", "electrolysis", "mitosis" ]
A
Cytokinesis is the final stage of cell division in eukaryotes as well as prokaryotes. During cytokinesis, the cytoplasm splits in two and the cell divides. Cytokinesis occurs somewhat differently in plant and animal cells, as shown in Figure below . In animal cells, the plasma membrane of the parent cell pinches inward...
sciq
sciq_01_09192
What type of chemicals do ants communicate with?
[ "Alkanes", "hormones", "pesticides", "pheromones" ]
D
We must use energy to get energy resources. This is true of non-renewable and renewable energy. Getting fossil fuels so that they can be used takes many steps. All of these steps use energy.
sciq
sciq_01_11651
Ectotherms undergo a variety of changes at the cellular level to acclimatize to shifts in what?
[ "density", "altitude", "temperature", "volume" ]
C
There are 44 autosomes and 2 sex chromosomes in the human genome, for a total of 46 chromosomes (23 pairs). Sex chromosomes specify an organism's genetic sex. Humans can have two different sex chromosomes, one called X and the other Y. Normal females possess two X chromosomes and normal males one X and one Y. An autoso...
medmcqa
medmcqa_05_02656
McAfee and Johnson regimen is used for:
[ "Eclampsia", "Placenta previa", "Placental abruption", "Placenta accrete" ]
B
Ans. (b) Placenta previaRef.: D.C. Dutta 8th ed. / 290, Williams 22nd ed./822-823* MacAfee and Johnson Regimen is a Conservative Management in Placenta Previa: This consists of complete bed rest, tocolysis, and close observation of patient.* Steroids are generally given to enhance lung maturity.* To undertake this regi...
math_qa
mathqa_03_04186
water consists of hydrogen and oxygen , and the approximate ratio , by mass , of hydrogen to oxygen is 2 : 16 . approximately how many grams of oxygen are there in 135 grams of water ?
[ "120", "116", "112", "108" ]
A
"( 16 / 18 ) * 144 = 120 grams the answer is a ."
ARC-Easy
arc_04_00261
Which tool is most responsible for preventing future pandemics of smallpox?
[ "worldwide vaccination for smallpox", "global education about smallpox", "better worldwide urban sanitation", "improved global quarantine facilities" ]
A
null
medmcqa
medmcqa_05_00310
Carbohydrate tumor marker for breast cancer:
[ "CA 15-3", "CA 125", "CA 34", "CA 19-9" ]
A
Carbohydrate-rich tumor markers are specific antigens found either on the surface of tumor cells or may also be secreted as products by the tumor cells. CA: carbohydrate antigen/cancer antigen. Specific Proteins Immunoglobulins Multiple myeloma and other gammopathies Prostate-specific antigen and prostate-specific memb...
math_qa
mathqa_03_04494
a train is moving at 6 / 7 of its usual speed . the train is 10 minutes too late . what is the usual time ( in hours ) for the train to complete the journey ?
[ "0.5", "1", "1.5", "2" ]
B
"new time = d / ( 6 v / 7 ) = 7 / 6 * usual time 10 minutes represents 1 / 6 of the usual time . the usual time is 1 hour . the answer is b ."
math_qa
mathqa_03_01092
in a tree , 3 / 7 of the birds are robins while the rest are bluejays . if 1 / 3 of the robins are female and 3 / 5 of the bluejays are female , what fraction of the birds in the tree are male ?
[ "11 / 35", "14 / 35", "18 / 35", "31 / 70" ]
C
"the fraction of birds that are male robins is ( 2 / 3 ) ( 3 / 7 ) = 2 / 7 . the fraction of birds that are male bluejays is ( 2 / 5 ) ( 4 / 7 ) = 8 / 35 . the total fraction of male birds is 2 / 7 + 8 / 35 = 18 / 35 . the answer is c ."
math_qa
mathqa_03_03114
a sells a bicycle to b at a profit of 30 % and b sells it to c at a loss of 20 % . find the resultant profit or loss .
[ "5 %", "4 %", "- 4 %", "- 12 %" ]
B
the resultant profit or loss = 30 - 20 - ( 30 * 20 ) / 100 = 4 % profit = 4 % answer is b
sciq
sciq_01_03201
What processes involve a transfer of electrons between the wire and the solution?
[ "electrochemical", "radioactive", "thermal", "magnetic" ]
A
Electrochemistry is the study of chemical processes that occur at the interface between an electron conductor, such as a wire, and a solution of electrolytes, which is often simply an ionic substance dissolved in water. Electrochemical processes involve a transfer of electrons between the wire and the solution. These r...
math_qa
mathqa_03_02403
a train with a length of 100 meters , is traveling at a speed of 72 km / hr . the train enters a tunnel 2.3 km long . how many minutes does it take the train to pass through the tunnel from the moment the front enters to the moment the rear emerges ?
[ "2.0", "2.5", "3.0", "3.5" ]
A
72 km / hr = 1.2 km / min the total distance is 2.4 km . 2.4 / 1.2 = 2 minutes the answer is a .
math_qa
mathqa_03_04545
marcella has 23 pairs of shoes . if she loses 9 individual shoes , what is the greatest number of matching pairs she could have left ?
[ "21", "20", "19", "18" ]
D
marcella has 23 pairs of shoes and loses 9 shoes . to minimize the loss of identical pairs of shoes we want marcella to lose as many identical pairs as possible . this would yield 4 identical pairs and 1 additional shoe ( destroying 5 pairs of shoes ) . the 23 pairs of shoes minus the 5 ' destroyed ' pairs yields 20 pa...
math_qa
mathqa_03_03086
how many trailing zeroes does 53 ! + 54 ! have ?
[ "12", "13", "14", "15" ]
B
53 ! + 54 ! = 53 ! + 54 * 53 ! = 53 ! ( 1 + 54 ) = 53 ! * 55 number of trailing 0 s in 53 ! = number of 5 s in the expansion of 53 ! = 10 + 2 = 12 there is 1 more 5 in 55 . hence , total number of trailing 0 s = 12 + 1 = 13 answer ( b ) . in most cases , when we are adding multiple terms , all of which have trailing 0 ...