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math_qa
mathqa_03_03261
the h . c . f . of two numbers is 12 and their l . c . m . is 600 . if one of the number is 45 , find the other ?
[ "100", "160", "120", "200" ]
B
"other number = 12 * 600 / 45 = 160 answer is b"
sciq
sciq_01_09972
What is the upper most level of earth's layers called?
[ "mantle", "volcanic", "surface", "crust" ]
D
You can't go to the mantle but small pieces of the mantle can come to you. Kimberlite forms deep in the mantle and is erupted violently into the crust. Kimberlite can contain diamonds. Most kimberlites reached the surface much earlier in Earth history.
ARC-Challenge
arc_04_02518
When gasoline in a car engine is burned, only about 15 percent of the gasoline is converted into mechanical energy. This is because most of the energy in the gasoline is
[ "transformed into heat.", "stored for use at a later time.", "changed into chemical energy.", "used to make the vehicle move." ]
A
null
sciq
sciq_01_11304
In plants, a cell plate is formed during cell cytokinesis by golgi vesicles fusing at the what?
[ "chromosomes plate", "metaphase plate", "mitosis plate", "tectonic plate" ]
B
Telophase I and Cytokinesis In telophase, the separated chromosomes arrive at opposite poles. The remainder of the typical telophase events may or may not occur, depending on the species. In some organisms, the chromosomes decondense and nuclear envelopes form around the chromatids in telophase I. In other organisms, c...
math_qa
mathqa_03_03321
marcella has 27 pairs of shoes . if she loses 9 individual shoes , what is the greatest number of matching pairs she could have left ?
[ "22", "20", "19", "16" ]
A
"marcella has 27 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 27 pairs of shoes minus the 5 ' destroyed ' pairs yields 22 p...
medmcqa
medmcqa_05_01539
Which cranial nerve has the largest intracranial course?
[ "Vagus nerve", "Oculomotor nerve", "Trochlear nerve", "Abducens nerve" ]
C
Ans. C Trochlear nerveRef: BDC 6th ed. Vol-III pg. 362* Trochlear nerve is the only cranial nerve to emerge dorsally from the brain stem.# It has the longest intracranial course and it is the most slender cranial nerve in terms of axon contents.* Largest cranial nerve: Trigeminal N. (CN 5th)* CN which has most extensiv...
openbookqa
obqa_02_03553
If a globe has a range of populace, it likely also has
[ "old babies", "varied homes", "poisoned blood", "teal rabbits" ]
B
the Earth contains many ecosystems
math_qa
mathqa_03_02186
a man sold 18 toys for rs . 16800 , gaining thereby the cost price of 3 toy find the cost price of a toy
[ "rs . 600", "rs . 800", "rs . 500", "rs . 900" ]
B
"let the cost of one toy = x . then , cost of 18 toys = 18 x . gain = 3 x . sp of 18 toys = rs . 16800 . gain = sp – cp 3 x = 16800 – 18 x 21 x = 16800 x = rs . 800 . answer : b"
math_qa
mathqa_03_03431
if it is assumed that 60 percent of those who receive a questionnaire by mail will respond and 210 responses are needed , what is the minimum number of questionnaires that should be mailed ?
[ "290", "320", "350", "380" ]
C
let x be the minimum number of questionnaires to be mailed . 0.6 x = 210 x = 350 the answer is c .
ARC-Challenge
arc_04_02494
A 72 W navigation unit on a commercial aircraft has a 24 V power supply and uses 3 A of electric current. What is the electrical resistance of the navigation unit?
[ "4 ohms", "8 ohms", "13 ohms", "22 ohms" ]
B
null
sciq
sciq_01_09966
What determines sex in animals?
[ "ribosomes", "cell density", "cell structure", "sex chromosomes" ]
D
Sex chromosomes determine sex in animals and many plants. Other chromosomes are called autosomes. Sex-linked traits are controlled by genes on sex chromosomes. They may be inherited differently than autosomal traits.
math_qa
mathqa_03_01559
a train 140 m long running at 84 kmph crosses a platform in 16 sec . what is the length of the platform ?
[ "287", "298", "233", "726" ]
C
"d = 84 * 5 / 18 = 16 = 373 â € “ 140 = 233 answer : c"
ARC-Easy
arc_04_01476
Which unit of measurement describes an object's length?
[ "meter", "kilogram", "liter", "degree" ]
A
null
sciq
sciq_01_02220
What type of behaviors do not have to be learned or practiced?
[ "diverse behaviors", "innate behaviors", "protective behaviors", "acquired behaviors" ]
B
Innate behaviors do not have to be learned or practiced.
sciq
sciq_01_04700
What type of temperatures increase the likelihood of fires?
[ "reduced", "higher", "lower", "freezing" ]
B
sciq
sciq_01_09783
Does water get colder or warmer the deeper you go?
[ "neither", "warmer", "colder, than warmer", "colder" ]
D
Water also gets colder as you go deeper. The weight of the water pressing down from above increases as well. At great depths, life becomes very difficult. The pressure is so great that only specially adapted creatures can live there.
medmcqa
medmcqa_05_04962
Why is neuronal synaptic conduction mostly ohodromic?
[ "Dendrites cannot be depolarized", "Once repolarized, an area cannot be depolarized", "The strength of antidromic impulse is less", "Chemical mediator is localised only in the presynaptic terminal" ]
D
Characteristic of chemical synapses is that it always transmit signals in one direction, from the neuron that secretes the transmitter substance, called the presynaptic neuron, to the neuron on which the transmitter acts, called the postsynaptic neuron. Ref: Principles of Animal Physiology By Moyes, Page 218.
ARC-Challenge
arc_04_03053
When a plant wilts, the stomata close. How does this help the plant?
[ "It increases photosynthesis.", "It reduces further water loss.", "It increases cellular respiration.", "It reduces water intake by roots." ]
B
null
medmcqa
medmcqa_05_03841
Dawn phenomenon refers to-
[ "Early morning hyperglycemia", "Early morning hypolgycemia", "Hypoglycemia followed by hyperglycemia", "High insulin levels" ]
A
Question repeated The dawn phenomenon, sometimes called the dawn effect, is an early-morning (usually between 2 a.m. and 8 a.m.) increase in blood sugar (glucose) relevant to people with diabetes. It is different from chronic Somogyi rebound in that dawn phenomenon is not associated with nocturnal hypoglycemia. The daw...
openbookqa
obqa_02_03697
What does a beaver use to find something to munch on with?
[ "antennas", "teeth", "gills", "sense organs" ]
D
the nervous system sends observations in the form of electrical signals to the rest of the body
openbookqa
obqa_02_02186
An electric car will have difficulty receiving energy at
[ "a power outlet", "an electric station", "a charging station", "a gasoline station" ]
D
an electric car contains an electric motor
openbookqa
obqa_02_02248
An omnivore, such as a bear, will have many animals that are
[ "cuddling with it", "hungry for it", "consuming it", "fearful of it" ]
D
omnivores are predators
medmcqa
medmcqa_05_03076
Carcinoma maxillary sinus stage III (T3 M0 N0), treatment of choice is:
[ "Radiotherapy", "Surgery + Radiotherapy", "Chemotherapy", "Chemotherapy + Surgery" ]
B
(b) Surgery + Radiotherapy(Ref. Cummings, 6th ed., 1184)For all patients of carcinoma maxillary sinus (except small T1 lesions), the treatment is surgical resection (maxillectomy) followed by radiation therapy.
sciq
sciq_01_07571
What is happening to the rate of the expansion of the universe?
[ "it is increasing", "it is unknown", "it is stable", "it is decreasing" ]
A
The rate of the expansion of the universe is increasing. The cause of this increase is unknown; one possible explanation involves a new form of energy called dark energy.
sciq
sciq_01_02093
What is the name of the mechanism in which sounds are encoded in microwaves by changing their frequency?
[ "mechanical modulation", "frequency modulation", "shape modulation", "molecular modulation" ]
B
Cell phone signals are carried through the air as microwaves. You can see how this works in the Figure below . A cell phone encodes the sounds of the caller’s voice in microwaves by changing the frequency of the waves. This is called frequency modulation. The encoded microwaves are then sent from the phone through the ...
ARC-Challenge
arc_04_02262
What is the frequency of ocean waves that have a speed of 18 m/s and a wavelength of 50 m?
[ "0.18 Hz", "0.36 Hz", "2.8 Hz", "9.0 Hz" ]
B
null
math_qa
mathqa_03_04818
a lent rs . 5000 to b for 2 years and rs . 3000 to c for 4 years on simple interest at the same rate of interest and received rs . 1980 in all from both of them as interest . the rate of interest per annum is ?
[ "16 %", "12 %", "9 %", "10 %" ]
C
"let the rate be r % p . a . then , ( 5000 * r * 2 ) / 100 + ( 3000 * r * 4 ) / 100 = 1980 100 r + 120 r = 1980 r = 9 % answer : c"
sciq
sciq_01_07183
Altitude is height above what?
[ "sea level", "the water table", "the earth's core", "the earth's surface" ]
A
Altitude is height above sea level. The density of air decreases with height. There are two reasons. At higher altitudes, there is less air pushing down from above. Also, gravity is weaker farther from Earth's center. So at higher altitudes, air molecules can spread out more. Air density decreases. You can see this in ...
math_qa
mathqa_03_00767
a certain car uses 12 gallons of gasoline in traveling 360 miles . in order for the car to travel the same distance using 10 gallons of gasoline , by how many miles per gallon must the car ’ s gas mileage be increased ?
[ "2", "4", "6", "8" ]
C
"360 / 10 = 36 . the difference is 36 - 30 = 6 . answer c"
math_qa
mathqa_03_01148
from the digits 2 , 3 , 4 , 5 , 6 and 7 , how many 5 - digit numbers can be formed that have distinct digits and are multiples of 12 ?
[ "36", "60", "84", "72" ]
B
detailed solution any multiple of 12 should be a multiple of 4 and 3 . first , let us look at the constraint for a number being a multiple of 3 . sum of the digits should be a multiple of 3 . sum of all numbers from 2 to 7 is 27 . so , if we have to drop a digit and still retain a multiple of 3 , we should drop either ...
ARC-Easy
arc_04_00845
In the morning, students observed puddles of water all over the playground. What would best explain why the playground was dry in the afternoon?
[ "Animals drank the water.", "The wind stopped blowing.", "Someone dried the puddles.", "The water evaporated during the day." ]
D
null
sciq
sciq_01_05112
Light bends when it passes in from what to what?
[ "water to air", "product to water", "air to water", "air to ground" ]
C
Refraction is another way that waves interact with matter. Refraction occurs when waves bend as they enter a new medium at an angle. You can see an example of refraction in Figure below . Light bends when it passes from air to water. The bending of the light causes the pencil to appear broken.
openbookqa
obqa_02_01301
It becomes cold enough for heavy clothing in December in the northern hemisphere because
[ "our planet's axis is tilted", "Mercury's axis is tilted", "the gravitational pull of Pluto on the southern hemisphere", "lyrics about winter by popular musicians always mention bundling up" ]
A
Earth 's tilt on its axis causes seasons to occur
openbookqa
obqa_02_02402
A person wants to know how fast winds will be going this week. They buy a device made of metal and
[ "place it outside next to the chimney", "place it in the basement of their house", "place it on the ground outdoors", "leave it in the car overnight" ]
A
an anemometer is used to measure wind speed
ARC-Easy
arc_04_00427
Which resource has the most potential for production of renewable electric energy?
[ "coal", "oil", "natural gas", "geothermal" ]
D
null
sciq
sciq_01_07170
What is the term for the average number of individuals in a population per unit of area or volume?
[ "Density group", "population density", "population diameter", "population structure" ]
B
Population density is the average number of individuals in a population per unit of area or volume. For example, a population of 100 insects that live in an area of 100 square meters has a density of 1 insect per square meter. If the same population lives in an area of only 1 square meter, what is its density? Which po...
medmcqa
medmcqa_05_00290
Which among the following is NOT a pain sensitive structure in the brain?
[ "Middle meningeal aery", "Falx cerebri", "Dural sinuses", "Choroid plexus" ]
D
Relatively few cranial structures are pain-producing; these include the scalp, middle meningeal aery, dural sinuses, falx cerebri, and proximal segments of the large pial aeries. The ventricular ependyma, choroid plexus, pial veins, and much of the brain parenchyma are not pain-producing. Ref: Goadsby P.J., Raskin N.H....
medmcqa
medmcqa_05_00142
Major complication of cyst-gastrostomy for pseudo pancreatic cyst is?
[ "Infection", "Obstruction", "Fistula", "Hemorrhage" ]
D
Ans. (d) HemorrhageRef : CSDTUthed/638* Serious post-op hemorrhage from cyst occurs from cystogastrostomy.* Most common cause of pseudopancreatic cyst is pancreatitis.* It may resolve spontaneously, so it is followed with serial ultrasonic studies.Indications of Surgical Intervention* Age of cyst more than 6 weeks with...
sciq
sciq_01_09582
Organisms cannot live alone, needing other organisms to survive; what is this relationship called?
[ "dominance", "interdependence", "independence", "coexistence" ]
B
Organisms are not independent, they are interdependent . They cannot live alone; they need other organisms to survive. The same is true for species. All species need other species to survive.
openbookqa
obqa_02_03959
Light enters what through the pupil?
[ "skin", "visual organ", "eye spy", "eye diagram" ]
B
light enters the eye through the pupil
sciq
sciq_01_02704
What is the attraction of oppositely charged ions caused by electron transfer called?
[ "ionic bond", "solvent bond", "velocity bond", "covalent bond" ]
A
The attraction of oppositely charged ions caused by electron transfer is called an ionic bond.
ARC-Easy
arc_04_01117
Mold is often found growing on old bread. In a food chain, mold is a ___.
[ "decomposer", "producer", "consumer", "scavenger" ]
A
null
sciq
sciq_01_11539
What is the process that allows organisms with better traits to survive and produce?
[ "natural selection", "spontaneous mutation", "adaptation", "succession" ]
A
Evolution occurs by natural selection, the process by which organisms with traits that better enable them to adapt to their environment will tend to survive and reproduce in greater numbers. Evolution is due to differences in the survival and reproduction of individuals within a population.
medmcqa
medmcqa_05_00638
Birbeck granules are seen in the cytoplasm of
[ "Mast cells", "Langerhans cells", "Thrombocytes", "Myelocytes" ]
B
Langerhans cell histiocytosis (LCH)*Langerhans cell is a dendritic cell which is an antigen presenting cell*LCH is a clonal histiocytic disorder*Birbeck granules are present in the cytoplasm of Langerhans cell.Characteristic features of LCHPresence of Birbeck granules - Electron microscopy ( Tennis racquet appearance)P...
openbookqa
obqa_02_00903
What does a squirrel not eat?
[ "plants", "seeds", "fruits", "animals" ]
D
squirrels eat edible plants
sciq
sciq_01_00751
What are the key to species evolving?
[ "mutations", "radiation", "microbes", "parasites" ]
A
Mutations are the key to species evolving. Lets say an organism "mutates" due to a new allele for a gene that determines coat color. There are, theoretically, only three outcomes of that mutation:.
medmcqa
medmcqa_05_03495
Safest contrast in esophageal perforation:
[ "Iohexol", "Barium sulphate", "Gadolinium", "Hypaque" ]
A
"Iodinated contrast Materials Water-soluble iodinated contrast media can be used to visualize the upper gastrointestinal tract. These contrast material are considered safer than barium sulfate in patients with esophageal perforation or communication between esophagus and airways and when there is a risk of aspiration o...
math_qa
mathqa_03_04720
find the area of a rhombus having each side equal to 13 cm and one of whose diagonal is 24 cm .
[ "150 sq . cm'", "120 sq . cm'", "130 sq . cm'", "125 sq . cm'" ]
B
let abcd is a rhombus with diagonals ac and bd which intersect each other at o . ac = 24 ⇒ ao = 12 let bo = x and ab = 13 cm ( given ) by pythagorean theorem c 2 = a 2 + b 2 13 2 = 12 2 + x 2 169 = 144 + x 2 x 2 = 169 – 144 x 2 = 25 x = 5 cm bo = 5 cm diagonal bd = 2 x 5 = 10 cm . area = ½ x [ product of diagonals ] = ...
medmcqa
medmcqa_05_00200
Incisura terminals are between
[ "Tragus and crux of helix", "Ear lobule and antihelix", "Antihelix and external auditory meatus", "Tragus and ear lobule" ]
A
There is no cailage between tragus and crus of the helix and an incision made in this area will not cut through the cailage and is used for the endaural approach in surgery of external auditory canal and mastoid. Reference: Dhingra 6th edition; page no 2
medmcqa
medmcqa_05_04543
Cavett test done for -
[ "Urine alcohol level", "Blood alcohol level.", "Urine ethylene glycol", "Blood ethylene glycol" ]
B
(B) (Blood alcohol level)(537- KSN Reddy 31th)* Blood is the most suitable and most direct evidence of the concentration of alcohol in brain.* Methods used for determining blood alcohol are:1. Kozelka and Hine test2. Cavett testBasic principle is a reduction of potassium bichromate by the test substance.* For medicoleg...
sciq
sciq_01_01114
What's the term for the period during which women's ovaries stop producing eggs?
[ "menopause", "maturity", "puberty", "adolescence" ]
A
For most women, menstrual cycles continue until their mid- or late- forties. Then women go through menopause , a period during which their menstrual cycles slow down and eventually stop, generally by their early fifties. After menopause, women can no longer reproduce naturally because their ovaries no longer produce eg...
medmcqa
medmcqa_05_01779
The drug of choice for status epilepticus is ?
[ "Propofol", "Lorazepam", "Thiopentone", "Haloperidol" ]
B
Ans. is 'b' i.e., Lorazepam
sciq
sciq_01_04342
What is the process that ventilates lungs called?
[ "perspiration", "breathing", "reproduction", "photosynthesis" ]
B
openbookqa
obqa_02_01696
A granite counter top
[ "will always cost more than a mountain", "should be cleaned with mineral water", "is only found in a kitchen", "is made of minerals" ]
D
rock is made of minerals
sciq
sciq_01_10628
Microwaves are converted into what kind of energy in a microwave oven?
[ "solar energy", "thermal energy", "mechanical energy", "light energy" ]
B
Electromagnetic waves may also be absorbed by matter and converted to other forms of energy. Microwaves are a familiar example. When microwaves strike food in a microwave oven, they are absorbed and converted to thermal energy, which heats the food.
math_qa
mathqa_03_02074
what is the smallest positive integer k such that the product of 450 x k is a perfect square ?
[ "3", "9", "15", "25" ]
A
"a perfect square , is just an integer that can be written as the square of some other integer . for example 16 = 4 ^ 2 , is a perfect square . now , 450 = 3 ^ 2 * 5 ^ 2 * 3 , so if k = 3 then 450 k = ( 3 * 5 * 3 ) ^ 2 , which is a perfect square ( basically the least positive value of k must complete only the power of...
sciq
sciq_01_07669
What is the force of gravity called?
[ "mass", "pressure", "scale", "weight" ]
D
The force of gravity is called weight. Near the surface of a planet, it has magnitude and is directed perpendicular to its surface. This is different from the Gravitational Constant, and differs from planet to planet.
sciq
sciq_01_00126
The difference between the theoretical half-reaction reduction potential and the actual voltage required is called what?
[ "overcharge", "overpotential", "excess", "resistance" ]
B
can occur in electrolytic cells by introducing a power supply, which supplies the energy to force the electrons to flow in the nonspontaneous direction. Electrolysis is done in solutions, which contain enough ions so current can flow. If the solution contains only one material, like the electrolysis of molten sodium ch...
openbookqa
obqa_02_01594
Louis Pasteur found a way to
[ "make food tasty", "make food healthier", "make food wet", "make food green" ]
B
Louis Pasteur invented pasteurization
sciq
sciq_01_08704
Multiple sclerosis, huntington’s disease, and parkinson’s disease all affect what body system?
[ "reproductive system", "nervous system", "lymph system", "circulatory system" ]
B
In addition to ALS and Alzheimer's disease, other serious nervous system diseases include multiple sclerosis, Huntington’s disease, and Parkinson’s disease. T hese diseases rarely, if ever, occur in young people. Their causes and symptoms are listed below ( Table below ). The diseases have no known cure, but medicines ...
openbookqa
obqa_02_01050
The most daylight is two months after
[ "October", "July", "January", "April" ]
D
the amount of daylight is greatest in the summer
openbookqa
obqa_02_01493
A simple pulley example could be
[ "Going running on a treadmill", "Swimming lap in a pool", "Riding a bike outside", "pulling water from a well" ]
D
a pulley is used to lift a flag on a flagpole
medmcqa
medmcqa_05_04225
In systemic senile amyloidosis there is deposition of?
[ "AA", "AL", "Beta - 2- microglobulin", "ATTR" ]
D
Ans. is 'd' i.e., ATTR Important systemic amyloidosisAmyloid proteinPrecursorSyndrome or involved tissueALImmunoglobulin light chainPrimary Myeloma associatedAASerum AA (SAA)Reactive, chronic inflammatory conditionA b2mb2 microglobulinHemodialysisAASAAFamilial mediterranean feverATTRTransthyretinFamilial amyloidotic po...
sciq
sciq_01_01941
Veins subdivide repeatedly and branch throughout what?
[ "epidermis", "stroma", "mesophyll", "periosteum" ]
C
sciq
sciq_01_06632
When two plates of continental crust collide, the material pushes upward and forms what?
[ "valleys", "fault lines", "low mountain range", "high mountain range" ]
D
When two plates of continental crust collide, the material pushes upward. This forms a high mountain range. The remnants of subducted oceanic crust remain beneath the continental convergence zone.
medmcqa
medmcqa_05_04750
Depolarization of human ventricular muscle starts from
[ "Posterobasal part of ventricle", "Left side of interventricular septum", "Uppermost portion of interventricular septum", "Basal portion of ventricle" ]
B
Order of depolarization in the heart. -        First- Left side of the interventricular septum -        Moves to right across the mid portion of the septum -        Apex of heart -        Along ventricular walls to AV groove (Endocardium to epicardium) -        Last- Posterobasal portion of the left ventricle, pulmonar...
medmcqa
medmcqa_05_01715
Which phase of cell division is most appropriate for chromosomal studies?
[ "Prophase", "Metaphase", "Telophase", "Anaphase" ]
B
Chromosome preparations can be obtained from any actively dividing tissue by causing the cells to arrest in metaphase, the stage of the cell cycle when chromosomes are maximally condensed. Cells are isolated at metaphase or prometaphase and treated chemically or enzymatically to reveal chromosome "bands". Analysis of t...
sciq
sciq_01_04210
Cephalization refers to the development of what anatomical region, which evolved at the same time as bilateral symmetry in animals?
[ "head", "tail", "chest", "heart" ]
A
Example Problem: The density of steel is 9000. kg/m 3 and the density of water is 1000. kg/m 3 . If a cube of steel that is 0.100 m on each side is placed in a tank of water and weighed while under water, what is the apparent weight of the cube?.
sciq
sciq_01_11232
Chromosomal alterations are mutations that change what?
[ "discovery structure", "detected structure", "chromosome structure", "Skeleton Structure" ]
C
Chromosomal alterations are mutations that change chromosome structure. They occur when a section of a chromosome breaks off and rejoins incorrectly or does not rejoin at all. Possible ways these mutations can occur are illustrated in Figure below . Go to this link for a video about chromosomal alterations: http://www....
openbookqa
obqa_02_00091
Compared to a regular swimmer, a scuba diver deals with more
[ "heat", "pressure", "water", "air" ]
B
as an object descends into water , the pressure on that object will increase
medmcqa
medmcqa_05_04733
Gas cylinder with single pin index -
[ "Oxygen", "Air", "Nitrogen", "Entonox" ]
D
Ans. is 'd' i.e., Entonox GasPin indexOxygen2,5Nitrous oxide3,5Cyclopropane3,6Air1,5Nitrogen1,4Entonox (50% O2 + 50% N2O)Single central (7)Carbon dioxide (< 7[?]5%)2,6Carbon dioxide (>7[?]5%)1,6
ARC-Challenge
arc_04_02971
In early 2003, the Human Genome Project identified the sequence of base pairs in the genes in human DNA. With all of this information, many of the functions of the genes are still unknown. Currently, scientists are studying many of these genes in order to learn more about them. What is the significance of this new gene...
[ "It can provide new methods for creating diseases.", "It can lead to faster chromosome replication.", "It can lead to a simpler structure for DNA.", "It can provide new ways to treat diseases." ]
D
null
openbookqa
obqa_02_02255
A whitetail that lives in a forest will be required to adapt to
[ "long sleeves", "harsh precipitation", "silly anecdotes", "boring movies" ]
B
changes in an environment cause animals to adapt to survive
openbookqa
obqa_02_01029
If a head is exceptionally round
[ "that is an unusual feature", "most heads are round", "a parent probably had a round head", "there is fluid on the brain" ]
C
the shape of body parts is an inherited characteristic
sciq
sciq_01_00702
In harmonic motion there is always what force, which acts in the opposite direction of the velocity?
[ "magnetic force", "locomotion force", "restorative force", "inorganic force" ]
C
In harmonic motion there is always a restorative force , which acts in the opposite direction of the velocity. The restorative force changes during oscillation and depends on the position of the object. In a spring the force is the spring force; in a pendulum it is the component of gravity along the path. In both cases...
sciq
sciq_01_05940
What keeps glaciers from forming in water?
[ "warmth", "skin", "movement", "salt" ]
A
Glaciers form only on land because water is too warm. When a glacier flows into water, it usually breaks up into icebergs. Those icebergs eventually melt into the water.
math_qa
mathqa_03_02457
in the number 11,0 ab , a and b represent the tens and units digits , respectively . if 11,0 ab is divisible by 45 , what is the greatest possible value of b × a ?
[ "0", "5", "10", "15" ]
D
"you should notice that 55 * 2 = 110 so 11,000 is divisible by 55 : 55 * 200 = 11,000 ( or you can notice that 11,000 is obviously divisible by both 5 and 11 so by 55 ) - - > b * a = 0 * 0 = 0 . next number divisible by 55 is 11,000 + 55 = 11,055 : b * a = 5 * 3 = 15 ( next number wo n ' t have 110 as the first 3 digit...
math_qa
mathqa_03_00216
a student chose a number , multiplied it by 2 , then subtracted 152 from the result and got 102 . what was the number he chose ?
[ "127", "100", "129", "160" ]
A
"solution : let x be the number he chose , then 2 * x * 152 = 102 2 x = 254 x = 127 correct answer a"
openbookqa
obqa_02_02883
A person who is trying something out for the first time that will have unpredictable reactions will
[ "want zero protection", "want safety goggles", "want naked skin", "want bare hands" ]
B
safety goggles are used for protecting the eyes during experiments
medmcqa
medmcqa_05_04761
D-dimer is the most sensitive test for-
[ "Pulmonary embolism", "Acute pulmonary edema", "Cardiac tamponade", "Acute MI" ]
A
Robbins Basic Pathology (9th Edition),page no.85 Clotting also sets into motion a fibrinolytic cascade that moderates the ultimate size of the clot. Fibrinolysis is largely carried out by plasmin, which breaks down fibrin and interferes with its polymerization . The resulting fibrin split products (FSPs or fibrin degra...
sciq
sciq_01_05207
In stars like our sun, hydrogen atoms join together to create what?
[ "helium atom", "iron atom", "water molecule", "oxygen atom" ]
A
A nuclear fusion reaction is so named because the nuclei (center) of atoms fuse (join) together in the process. In stars like our Sun, hydrogen atoms join together to create a helium atom. Nuclear fusion reactions need a lot of energy to get started. Once they begin, they produce even more energy. ( Figure below ).
medmcqa
medmcqa_05_00921
Treatment of adenomyosis :
[ "Estrogens", "Estrogens and progesterones", "Total hysterectomy", "Laser" ]
C
Total hysterectomy
ARC-Challenge
arc_04_02864
Scientists group animals based on physical features. Trout are classified as fish because of what physical feature?
[ "Fish have gills.", "Fish eat the same food.", "Fish live in the same area.", "Fish have the same predators." ]
A
null
math_qa
mathqa_03_03491
let the number which when multiplied by 12 is increased by 198 .
[ "18", "20", "26", "28" ]
A
"solution let the number be x . then , 12 x - x = 198 ‹ = › 11 x = 198 x ‹ = › 18 . answer a"
medmcqa
medmcqa_05_02390
Hanging cast is used for?
[ "Femur", "Radius", "Humerus", "Tibia" ]
C
Ans. is 'c' i.e., Humerus Cast/ Brace Used In Hanging cast & "Sugar tong" or Coaptation splintsCylinder castFracture shaft humerusFracture patellaMinnerva cast, Halo deviceCervical spineRisser's cast, Milwaukee braceBoston braceScoliosisPalvic harness, Von Rosen splint,Ilfeld or Craig splintCongenital (Developmental)Dy...
sciq
sciq_01_07410
The negatively charged electrons are attracted to the positively charged what?
[ "atom", "ion", "axon", "nucleus" ]
D
openbookqa
obqa_02_04871
All of the following but which would be considered renewable energy sources?
[ "Solar", "Wind", "Natural Gas", "Hydropower" ]
C
wind is a source of energy
sciq
sciq_01_09677
What is required for both the synthesis and breakdown of molecules?
[ "mixing", "heating", "sunlight", "energy" ]
D
Introduction Virtually every task performed by living organisms requires energy. Energy is needed to perform heavy labor and exercise, but humans also use a great deal of energy while thinking, and even during sleep. In fact, the living cells of every organism constantly use energy. Nutrients and other molecules are im...
medmcqa
medmcqa_05_03185
Sequence of colour changes observed in Raynaud's disease: September 2009, March 2012
[ "Red, blue, white", "White, blue, red", "Blue, red, white", "White, red, blue" ]
B
Ans. B: White, blue, red The change in skin color is caused by the constriction or narrowing, or spasm of blood vessels in the finger, toes, and earlobes. This causes blood flow to the area be reduced, and the skin color to turn white (pallor). When the oxygen supply to the area is depleted, the skin color turn blue (c...
medmcqa
medmcqa_05_00926
Most accurate treatment of erectile dysfunction:
[ "Sildenafil", "Master and johnson technique", "B-blockers", "Papaverine" ]
A
A i.e. SildenafilSildenafil is only approved & effective oral agent for erectile dysfunctionQ. It is useful in wide range of e.d.including - pyschogenic, diabetogenic, vasculogenic, post radical prostatectomy (nerve sparing procedure) & spinal cord injury.It acts by inhibiting phosphodiesterase - 5 (PDE-5)Q & releasing...
sciq
sciq_01_00334
What occurs when some members of a species become geographically separated?
[ "reflective speciation", "divergent speciation", "symbiotic speciation", "allopatric speciation" ]
D
New species arise in the process of speciation. Allopatric speciation occurs when some members of a species become geographically separated. They then evolve genetic differences. If the differences prevent them from interbreeding with the original species, a new species has evolved. Sympatric speciation occurs without ...
sciq
sciq_01_06341
What organisms use cilia, pseudopods, or flagella to move?
[ "arthropods", "bacteria", "prokaryotes", "protists" ]
D
Protists use cilia, pseudopods, or flagella to move.
sciq
sciq_01_09413
What are the two most abundant elements in the universe?
[ "nitrogen and carbon", "oxygen and carbon", "hydrogen and oxygen", "hydrogen and helium" ]
D
Hydrogen and helium are the most abundant elements in the universe.
sciq
sciq_01_08638
In what state do ionic compounds best conduct electricity?
[ "liquid", "solid", "plasma", "gas" ]
A
Solid ionic compounds are poor conductors of electricity. The strong bonds between ions lock them into place in the crystal. However, in the liquid state, ionic compounds are good conductors of electricity. Most ionic compounds dissolve easily in water. When they dissolve, they separate into individual ions. The ions c...
math_qa
mathqa_03_03017
x starts a business with rs . 52000 . y joins in the business after 6 months with rs . 26000 . what will be the ratio in which they should share the profit at the end of the year ?
[ "1 : 2", "2 : 3", "1 : 3", "4 : 1" ]
D
"explanation : ratio in which they should share the profit = ratio of the investments multiplied by the time period = 52000 * 12 : 26000 * 6 = 52 * 12 : 26 * 6 = 24 : 6 = 4 : 1 . answer : option d"
medmcqa
medmcqa_05_00669
First agent shown to be effective in maniac phase of BPD is
[ "Lithium", "Valproate", "Lamotrigine", "Carbamazepine" ]
A
.lithium was the frst agent to be used for mania it has mood stabilizing propey it was introduced by John F Cade it is liver friendly drug it has to be introduced in caution with renal derangements it can cause of hypothyroidim it should be given with caution with ACE inhibitors, NSAIDS, Angiotensin receptor antagonist...
sciq
sciq_01_08464
What changes encoded waves which are being broadcast into sounds?
[ "amplifiers", "radio receivers", "band receivers", "transmitters" ]
B
In radio broadcasts, sounds are encoded in radio waves by changing either the amplitude (AM) or frequency (FM) of the waves. The encoded waves are broadcast from a tower and changed back to sounds by radio receivers.
math_qa
mathqa_03_04712
a cylindrical container with 6 meters diameter and a height of 8 meters is filled to capacity with water . if the water is then used to fill several smaller cylinders ( 2 meters radius and 5 meters height ) , how many smaller cylinders can be filled to capacity before the larger cylinder becomes empty ?
[ "5'", "4'", "3'", "2'" ]
C
calculate the volume of the larger cylinder and divide it by the volume of the smaller cylinder . volume of cylinder = π r 2 h larger cylinder volume = 226.19 smaller cylinder volume = 62.83 therefore the number of smaller cylinders can be filled to capacity = 226.19 / 62.83 = 3.6 answer is c only 3 smaller cylinders c...
openbookqa
obqa_02_01223
In a year there is a complete revolution around a
[ "core", "planet", "star", "moon" ]
C
a complete revolution of the Earth around the sun takes one solar year
sciq
sciq_01_02901
All living organisms are classified into one of six broad categories called what?
[ "nobles", "kingdoms", "tribes", "cities" ]
B
The level of biodiversity found in the fossil record suggests that the last few million years include the period of greatest biodiversity in the Earth's history. However, not all scientists support this view, since there is a lot of uncertainty as to how strongly the fossil record is biased by the greater availability ...