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medmcqa
medmcqa_05_02129
Group B nerve fibres are situated in
[ "Muscle spindles", "Fibres carrying pain sensation", "Preganglionic autonomic fibres", "Post ganglionic autonomic fibres" ]
C
Types of nerve fibers fibers are fast fibers. -        Aα- Somatic motor to extrafusal fibers of muscle spindle, proprioception -        Aβ- Kinesthetic, pressure and touch -        Aγ- Motor to intrafusal fibers of muscle spindle -        Aδ-  Pain, temperature, touch and pressure -        B fibers- Autonomic pregangl...
sciq
sciq_01_04374
The theory of evolution by what (and other processes) explains both the diversity of organisms and how populations of organisms change over time?
[ "characteristic selection", "natural selection", "natural evolution", "genocide" ]
B
Biology has only a few over arching theories. One of these, the Cell Theory of Life, explains the historic continuity of organisms, while the Theory of Evolution by Natural Selection (and other processes), explains both the diversity of organisms and how populations of organisms change over time. Finally, the Physicoch...
sciq
sciq_01_08385
What are most metal objects made of?
[ "tin", "aluminum", "metal alloys", "bronze" ]
C
Most metal objects are made of metal alloys rather than pure metals.
math_qa
mathqa_03_02639
each day a man meets his wife at the train station after work , and then she drives him home . she always arrives exactly on time to pick him up . one day he catches an earlier train and arrives at the station an hour early . he immediately begins walking home along the same route the wife drives . eventually his wife ...
[ "45 minutes", "50 minutes", "40 minutes", "54 minutes" ]
D
"as they arrived 12 minutes earlier than usual , they saved 12 minutes on round trip from home to station ( home - station - home ) - - > 6 minutes in each direction ( home - station ) - - > wife meets husband 6 minutes earlier the usual meeting time - - > husband arrived an hour earlier the usual meeting time , so he ...
openbookqa
obqa_02_02125
Which is least likely to make a tasty meal for a predator?
[ "a rabbit", "a deer", "a skunk", "a baby moose" ]
C
a skunk produces a bad odor
openbookqa
obqa_02_03779
Who is likely to receive its coloration and hairy body from its parents?
[ "Peter the Parakeet", "Valentina the Vole", "Terry the Tuna", "Greta the Grouper" ]
B
the coloration of fur is an inherited characteristic
ARC-Easy
arc_04_00451
Which of the following climates has cold winters and hot summers?
[ "polar", "subtropical", "temperate", "tropical" ]
C
null
sciq
sciq_01_05629
What kind of anaerobe is yeast?
[ "mutualistic", "obligate", "aerobic", "facultative" ]
D
Yeast is a facultative anaerobe. This means that alcohol fermentation takes place only if: a. the temperature is close to 37°C b. the atmosphere does not contain oxygen c. sugar is provided to the cells d. light is provided to the cells.
sciq
sciq_01_07059
What cellular structure moves molecules between locations inside the cell?
[ "transport vesicles", "dna vesicles", "transport vessels", "capillaries" ]
A
Transport vesicles are able to move molecules between locations inside the cell. For example, transport vesicles move proteins from the rough endoplasmic reticulum to the Golgi apparatus.
sciq
sciq_01_01344
Skeletal muscles are attached to bones by what?
[ "tendons", "enzymes", "veins", "plasma" ]
A
Skeletal muscles are attached to bones by tendons.
math_qa
mathqa_03_01725
reduce 368 / 598 to the lowest terms
[ "30 / 25", "28 / 13", "28 / 29", "8 / 13" ]
D
explanation : we can do it easily by in two steps step 1 : we get the hcf of 368 and 598 which is 46 step 2 : divide both by 46 , we will get the answer 8 / 13 answer : option d
sciq
sciq_01_04068
What is an upward force that fluids exert on any object that is placed in them?
[ "gravity force", "efficient force", "warm force", "buoyant force" ]
D
Buoyant force is an upward force that fluids exert on any object that is placed in them. The ability of fluids to exert this force is called buoyancy . What explains buoyant force? A fluid exerts pressure in all directions, but the pressure is greater at greater depth. Therefore, the fluid below an object, where the fl...
sciq
sciq_01_05737
What is the term for force that opposes motion between any touching surfaces?
[ "stress", "gravity", "tension", "friction" ]
D
All machines make work easier, but they don’t increase the amount of work that is done. You can never get more work out of a machine than you put into it. In fact, a machine always does less work on an object than the user does on the machine. That’s because a machine must use some of the work put into it to overcome f...
medmcqa
medmcqa_05_04698
Mifepristone is used in management of:
[ "Threatened abortion", "Fibroid", "Ectopic pregnancy", "Molar pregnancy" ]
C
This is used in the conservative management of ectopic due to its primary action of being and antiprogestin.
sciq
sciq_01_08908
Plants alternate between haploid and what?
[ "monoplooid", "monoxoid", "diploid", "triploid" ]
C
Plants alternate between haploid and diploid generations. Haploid cells have one of each pair of chromosomes. Diploid cells have two of each pair.
math_qa
mathqa_03_04082
two trains 140 m and 180 m long run at the speed of 60 km / hr and 40 km / hr respectively in opposite directions on parallel tracks . the time which they take to cross each other is ?
[ "11.52 sec", "10.1 sec", "10.6 sec", "10.8 sec" ]
A
"relative speed = 60 + 40 = 100 km / hr . = 100 * 5 / 18 = 250 / 9 m / sec . distance covered in crossing each other = 140 + 180 = 320 m . required time = 320 * 9 / 250 = 11.52 sec . answer : a"
ARC-Easy
arc_04_00224
A student wants to design an experiment regarding the behavior of crickets. Which is the best question to ask to begin the experiment?
[ "Do crickets have 6 legs or 8 legs?", "How long are the antennae of a cricket?", "Do crickets chirp more during the day or at night?", "What is the most common cricket species?" ]
C
null
sciq
sciq_01_10247
If everything else stays the same in a system with a gas in it, and the gas gets warmer, what will happen to its pressure, generally?
[ "it drops", "it stays the same", "it's eliminated", "it increases" ]
D
Why does the pressure of a gas increase as it gets warmer? Particles of a gas are constantly moving and bumping into things. The force of the collisions is measured by pressure. Pressure is the amount of force exerted on a given area, such as pounds of force per square inch. When gas particles heat up and gain energy, ...
math_qa
mathqa_03_03446
a certain fruit stand sold apples for $ 0.70 each and cherry for $ 0.50 each . if a customer purchased both apples and bananas from the stand for a total of $ 6.30 , what total number of apples and bananas did the customer purchase ?
[ "12", "11", "13", "14" ]
B
some multiple of 7 + some multiple of 5 should yield 63 . to get to a some multiple of 5 , we should ensure that a 3 or 8 ( 5 + 3 ) should be a multiple of 7 . 63 is a direct multiple of 7 , however in this case there wo n ' t be any cherry . hence the next option is to look for a multiple of 7 that has 8 as the unit d...
sciq
sciq_01_04429
What is the place called where the axon of one neuron meets the dendrite of another?
[ "apoptosis", "synapse", "neurotransmitter", "uptake" ]
B
The place where the axon of one neuron meets the dendrite of another is called a synapse . Synapses are also found between neurons and other types of cells, such as muscle cells. The axon of the sending neuron does not actually touch the dendrite of the receiving neuron. There is a tiny gap between them, the synaptic c...
math_qa
mathqa_03_03956
rs . 6000 is lent out in two parts . one part is lent at 7 % p . a simple interest and the other is lent at 8 % p . a simple interest . the total interest at the end of one year was rs . 450 . find the ratio of the amounts lent at the lower rate and higher rate of interest ?
[ "5 : 1", "5 : 5", "5 : 8", "5 : 4" ]
B
"let the amount lent at 7 % be rs . x amount lent at 8 % is rs . ( 6000 - x ) total interest for one year on the two sums lent = 7 / 100 x + 8 / 100 ( 6000 - x ) = 480 - x / 100 = > 480 - 1 / 100 x = 450 = > x = 3000 amount lent at 10 % = 3000 required ratio = 3000 : 3000 = 5 : 5 answer : b"
sciq
sciq_01_08487
The collision of what is responsible for massive earthquakes?
[ "weather fronts", "fault lines", "tidal currents", "two continents" ]
D
The collision of two continents also creates massive earthquakes. Many earthquakes happen in the region in and around the Himalayan Mountains. The 2001 Gujarat, India earthquake is responsible for about 20,000 deaths, with many more people injured or made homeless ( Figure below ).
sciq
sciq_01_00627
There is a predictable amount of solute that can be dissolved at what?
[ "specific temperature", "light speed", "flat rate", "room temperature" ]
A
There is a predictable amount of solute that can be dissolved at a specific temperature.
math_qa
mathqa_03_02504
a and b can together finish a work in 40 days . they worked together for 10 days and then b left . after another 6 days , a finished the remaining work . in how many days a alone can finish the job ?
[ "10", "25", "60", "8" ]
D
"a + b 10 days work = 10 * 1 / 40 = 1 / 4 remaining work = 1 - 1 / 4 = 3 / 4 3 / 4 work is done by a in 6 days whole work will be done by a in 6 * 4 / 3 = 8 days answer is d"
ARC-Easy
arc_04_01677
Which statement correctly describes why there are fewer than 24 hours of daylight in Alaska during each day in April?
[ "Earth’s rotation slows during the day.", "Earth’s rotation slows during the night.", "Earth’s rotation causes both day and night.", "Earth’s tilt on its axis causes both day and night." ]
C
null
sciq
sciq_01_05763
How are the number of moles of carbon dioxide gas calculated?
[ "casuistry", "stoichiometry", "phytochemistry", "relativistic" ]
B
The number of moles of carbon dioxide gas is first calculated by stoichiometry. Then the ideal gas law is used to calculate the volume of CO 2 produced.
openbookqa
obqa_02_00933
That which is alive is made of cells such as
[ "rocks", "dirt", "water", "grapes" ]
D
a living thing is made of cells
ARC-Easy
arc_04_01303
How can plants most likely improve air quality?
[ "by absorbing nutrients", "by producing oxygen", "by producing sugar", "by absorbing water" ]
B
null
math_qa
mathqa_03_04161
matt and peter can do together a piece of work in 20 days . after they have worked together for 10 days matt stops and peter completes the remaining work in 10 days . in how many days peter complete the work separately .
[ "21", "20", "22", "23" ]
B
"together they complete the job in 20 days means they complete 10 / 20 of the job after 10 days . peter completes the remaining ( 10 / 20 ) of the job in 10 days which means that the whole job ( 1 ) can be completed in x days . < = > 8 / 20 - > 10 < = > x = 10 / ( 10 / 20 ) = 20 b"
medmcqa
medmcqa_05_01093
Childhood cholelithiasis is seen in-
[ "Hurler Syndrome", "Mucopolysaccharidosis", "Neimann Pick's disease", "Autoimmune hepatitis" ]
C
Ans. is 'c' i.e., Neimann Picks disease
medmcqa
medmcqa_05_00103
Fenoldapam is
[ "D1 agonist", "D1 α1 β1 agonist", "D1, α2 agonist", "D1 D2 agonist" ]
C
Fenoldopam is a agonist  at D1 & α2 receptor and used in hypertensive emergencies.
sciq
sciq_01_08206
What term describes a colloidal dispersion of a liquid in either a liquid or a solid?
[ "mix", "compound", "suspension", "emulsion" ]
D
An emulsion is a colloidal dispersion of a liquid in either a liquid or a solid.
medmcqa
medmcqa_05_04177
The narrowest pa of ureter is?
[ "At pelvic brim", "At ischial spine", "Pelvic ureteric junction", "At the entry of bladder" ]
D
The constrictions of the ureter are three in number as follows : (i) At the junction of pelvis of the ureter with abdominal pa of the ureter. (ii) At the pelvic brim. (iii) Where it pierces the bladder. It is narrowest here. Ureter: The ureter is a retroperitoneal, distensible muscular tube that connects the kidney wit...
ARC-Easy
arc_04_01796
Some machines can remove the salt that is in seawater. How does removing salt from seawater most help people?
[ "provides useable drinking water", "creates cleaner water for rivers", "enables more fish to live in lake water", "allows more plants to grow along rivers" ]
A
null
math_qa
mathqa_03_00193
a man swims downstream 36 km and upstream 26 km taking 2 hours each time , what is the speed of the man in still water ?
[ "9", "18.4", "15.5", "16.7" ]
C
"36 - - - 2 ds = 18 ? - - - - 1 26 - - - - 2 us = 13 ? - - - - 1 m = ? m = ( 18 + 13 ) / 2 = 15.5 answer : c"
medmcqa
medmcqa_05_03132
Salpingitis / Endosalpingitis is best confirmed by:
[ "Hysteroscopy + Laparoscopy", "X - ray", "Hysterosalpingography", "Sonosalpingography" ]
A
Hysteroscopy + Laparoscopy
math_qa
mathqa_03_00940
because he ’ s taxed by his home planet , mork pays a tax rate of 40 % on his income , while mindy pays a rate of only 30 % on hers . if mindy earned 2 times as much as mork did , what was their combined tax rate ?
[ "32.5 %", "34 %", "22.5 %", "33.3 %" ]
D
"say morks income is - 100 so tax paid will be 40 say mindys income is 2 * 100 = 200 so tax paid is 30 % * 200 = 60 total tax paid = 40 + 60 = 100 . combined tax % will be 100 / 100 + 200 = 33.3 %"
openbookqa
obqa_02_00806
Thirteen times a year, roughly, the moon
[ "crashes into the Earth", "is orbited by the Earth", "lights up the Earth", "completely rotates the Earth" ]
D
the moon orbiting the Earth approximately occurs 13 times per year
sciq
sciq_01_06986
Living in a large colony requires good communication. ants communicate with chemicals called what?
[ "peptides", "alkalides", "hormones", "pheromones" ]
D
Living in a large colony requires good communication. Ants communicate with chemicals called pheromones . For example, an ant deposits pheromones on the ground as it returns to the nest from a food source. It is marking the path so other ants can find the food. Honeybees communicate by doing a “waggle dance. ”.
openbookqa
obqa_02_03482
Which likely best models an earthquake?
[ "cutting paper", "crumpling foil", "folding paper", "eating foil" ]
B
earthquakes cause rock layers to fold on top of each other
openbookqa
obqa_02_01859
Jackrabbits' hind legs are
[ "weak", "stubby", "elongated", "short" ]
C
long ears are used for releasing heat by a jackrabbit
medmcqa
medmcqa_05_03009
Azygous vein drains into
[ "IVC", "Coronary sinus", "SVC", "Right atrium" ]
C
course and termination of azygos vein - The azygos vein enters the thorax by passing through the aoic opening of the diaphragm, The azygos vein then ascends up to fouh thoracic veebra where it arches forwards over the root of the right lung and ends by joining the posterior aspect of the superior vena cava just before ...
sciq
sciq_01_10016
What do metals typically lose to achieve stability?
[ "electrons", "atoms", "ions", "molecules" ]
A
Metals will typically lose electrons to achieve stability, while non-metals typically gain electrons to achieve stability. Two atoms or ions with the same number of electrons are referred to as isoelectronic .
ARC-Easy
arc_04_00724
Which of the following best describes a mineral?
[ "a solid natural material with a crystal structure", "a material that was once living but has decayed", "a liquid chemical used to make soil more fertile", "a nutrient produced by plants that other organisms need" ]
A
null
sciq
sciq_01_07258
A low level of radiation occurs naturally in the environment and is called what?
[ "background radiation", "Gamma radiation", "Alpha radiation", "Beta radiation" ]
A
A low level of radiation occurs naturally in the environment. This is called background radiation. One source of background radiation is rocks, which may contain small amounts of radioactive elements such as uranium. Another source is cosmic rays. These are charged particles that arrive on Earth from outer space. Backg...
sciq
sciq_01_04911
Which element has atomic number 87?
[ "barium", "iron", "francium", "argon" ]
C
Francium has an atomic number of 87. Write the chemical equation for the alpha particle emission of 212Fr. What is the daughter isotope?.
sciq
sciq_01_05262
Which is the most common sti (sexually transmitted infection) in the united states?
[ "chlamydia", "syphilis", "AIDS", "giardia" ]
A
Chlamydia is the most common STI in the United States. As shown in the graph in Figure below , females are much more likely than males to develop chlamydia. Like most STIs, rates of chlamydia are highest in teens and young adults.
medmcqa
medmcqa_05_02184
A patient of yours has a history of multiple substance abuses. She is now pregnant again and tells you that she has a little boy that is 2 years old who is slow in school and has difficulty concentrating. Which of the following substances has been associated with behavioral and developmental abnormalities in children?
[ "Tobacco", "Cocaine", "Caffeine", "Marijuana" ]
A
Moderate consumption of coffee has not been associated with any fetal risks. Consumption of more than five cups of coffee a day has been shown to be associated with a slightly increased risk of spontaneous aboion in some studies. Cocaine use has been associated with an increased incidence of placental abruption and a c...
math_qa
mathqa_03_03660
j is 25 % less than p and 20 % less than t . t is q % less than p . what is the value of q ?
[ "93.5", "90", "6.75", "6.25" ]
D
"usually we can solve every question of this type by choosing appropriate value of the variable and deriving the value of other related variables . let , p = 400 then j = ( 75 / 100 ) * 400 = 300 also j = ( 80 / 100 ) * t i . e . t = 300 * 100 / 80 = 375 and t = [ 1 - ( q / 100 ) ] * p i . e . 100 - q = 100 * t / p = 1...
math_qa
mathqa_03_04961
how long does a train 110 m long running at the speed of 72 km / hr takes to cross a bridge 140 m length ?
[ "82.1 sec .", "12.5 sec", "19.1 sec .", "17.1 sec ." ]
B
"speed = 72 * 5 / 18 = 20 m / sec total distance covered = 110 + 140 = 250 m . required time = 250 / 20 = 12.5 sec . answer : b"
openbookqa
obqa_02_02450
The natural illumination outside will be for shorter and shorter periods of time per day when
[ "during a solar eclipse", "spring season has begun", "a hurricane is approaching", "in late September north of the equator or late March south of the equator" ]
D
when the seasons change from the summer to the fall , the amount of daylight will decrease
math_qa
mathqa_03_02104
the number 130 can be written as the sum of the squares of 2 different positive integers . what is the sum of these 2 integers ?
[ "17", "16", "15", "14" ]
D
"11 ^ 2 + 3 ^ 2 = 130 - - > 11 + 3 = 14 . d"
math_qa
mathqa_03_02463
the average of 9 observations was 7 , that of the 1 st of 5 being 10 and that of the last 5 being 8 . what was the 5 th observation ?
[ "27", "12", "15", "17" ]
A
"explanation : 1 to 9 = 9 * 7 = 63 1 to 5 = 5 * 10 = 50 5 to 9 = 5 * 8 = 40 5 th = 50 + 40 = 90 – 63 = 27 option a"
sciq
sciq_01_04187
What force provides resistance whenever two surfaces are in contact?
[ "friction", "vibration", "tension", "rotation" ]
A
openbookqa
obqa_02_02009
Cameras reflect
[ "a persona", "good decisions", "UV rays", "the stars" ]
C
tinted lenses reflect ultraviolet rays
openbookqa
obqa_02_01442
Foggy days are said to be
[ "good for skin", "high in moister", "extremely dry", "very sunny" ]
B
moist means high in moisture
ARC-Easy
arc_04_01352
Which feature is a physical property of copper?
[ "insulates heat", "conducts electricity", "strong magnetic force", "liquid at room temperature" ]
B
null
openbookqa
obqa_02_02265
Solar energy comes from the sun and does which positive thing?
[ "electrocutes birds", "starves babies", "freezes water", "sustains mammals" ]
D
the sun is the source of solar energy called sunlight
ARC-Easy
arc_04_00835
Which of the following is an example of how insects are beneficial to humans?
[ "Insects can spread diseases.", "Insects have short life spans.", "Insects pollinate flowering plants.", "Insects sometimes eat poisonous plants." ]
C
null
sciq
sciq_01_01368
By breaking down organic matter, roundworms play an important role in which cycle?
[ "carbon cycle", "circadian cycle", "metamorphic cycle", "water cycle" ]
A
Roundworms may be free-living or parasitic organisms. Free-living worms are found mainly in freshwater habitats. Some live in moist soil. They generally feed on bacteria, fungi, protozoa, or decaying organic matter. By breaking down organic matter, they play an important role in the carbon cycle.
medmcqa
medmcqa_05_00916
Weight gain in the second year of life is -
[ "1 kg", "2 kg", "3 kg", "4 kg" ]
C
Ans. is 'c' i.e., 3 Kg
sciq
sciq_01_01424
What long molecules are composed of chains of units called monomers?
[ "microbes", "polymers", "complexes", "drummers" ]
B
Polymers are long molecules composed of chains of units called monomers.
openbookqa
obqa_02_03587
all animals
[ "fly", "are telepathic", "dig", "intake gaseous elements" ]
D
all animals breathe
math_qa
mathqa_03_01067
how many integers from 101 to 700 , inclusive , remains the value unchanged when the digits were reversed ?
[ "50", "60", "70", "80" ]
B
"question is asking for palindrome first digit possibilities - 1 through 6 = 6 7 is not possible here because it would result in a number greater than 7 ( i . e 707 , 717 . . ) second digit possibilities - 0 though 9 = 10 third digit is same as first digit = > total possible number meeting the given conditions = 6 * 10...
sciq
sciq_01_09792
What scale measures the total energy released by an earthquake?
[ "moment radiation scale", "direct magnitude scale", "moment magnitude scale", "moment identification scale" ]
C
The moment magnitude scale is the favored method of measuring earthquake magnitudes. It measures the total energy released by an earthquake. Moment magnitude is calculated by two things. One is the length of the fault break. The other is the distance the ground moves along the fault.
math_qa
mathqa_03_00215
if 30 oxen can plough 1 / 7 th of a field in 2 days , how many days 18 oxen will take to do the remaining work ?
[ "30 days", "20 days", "15 days", "18 days" ]
B
solution : we will use work equivalence method , 30 / 18 = ( 1 / 7 ) / ( 6 / 7 ) * x / 2 ; 5 / 3 = ( 1 / 6 ) * x / 2 ; or , x = 60 / 3 = 20 days . answer : option b
sciq
sciq_01_02812
What is the main type of organism that gets its energy directly from the sun?
[ "consumers", "plants", "animals", "carnivores" ]
B
This tiny plant can use the energy of the sun to make its own food. You can't make food by just sitting in the sun. Plants are not the only organisms that can get energy from the sun, however. Some protists, such as algae, and some bacteria can also use the energy of the sun to make their own food.
medmcqa
medmcqa_05_00214
Primary Regulator for central chemoreceptor -
[ "PaCO2", "PCO2", "H+", "O2" ]
C
Ans. is 'c' i.e., H+ Central chemoreceptors o These receptors are located in a chemosensitive area on the ventral surface of the medulla near the exit of the ninth and tenth cranial nerves. The primary stimulus for the central chemoreceptors is an increase in the hydrogen ion concentration. Stimulation of central chemo...
openbookqa
obqa_02_04048
You can work longer when
[ "Autumn changes to Winter", "spring changes to summer", "tree leaves start falling", "the first snow starts falling" ]
B
when the season changes , the amount of daylight will change
sciq
sciq_01_10550
What is the term for the breakdown of unstable isotopes into stable elements?
[ "isotopic decay", "secondary decay", "radioactive decrease", "radioactive decay" ]
D
Radioactive decay is the breakdown of unstable isotopes into stable elements. For example, carbon-14 is an unstable isotope of carbon that decays to the stable element nitrogen-14. The rate of decay of an isotope is measured in half-lives. A half-life is the time it takes for half a given amount of an isotope to decay.
sciq
sciq_01_01197
Soils with higher capacities generally have a larger reserve of what?
[ "water", "mineral nutrients", "protein", "hydrogen nutrients" ]
B
openbookqa
obqa_02_01878
A Bald Eagle's ability to build it's nest is
[ "observed trough observation of others", "a biological trait passed down in it's genes", "learned through trial and error", "learned from watching its mom" ]
B
An example of an inherited behavior is a bird building a nest
medmcqa
medmcqa_05_02510
Dose of i.v. adrenaline in term infant is during neonatal resuscitation -
[ "0.1 - 0.3 ml/kg in 1:1000", "0.3 - 0.5 ml/kg in 1:1000", "0.1-0.3 ml/kg in 1:10,000", "0.3 - 0.5 ml/kg in 1:10,000" ]
C
Ans. is c i.e., 0.1-0.3 mUkg in 1:10,000 Dose or adrenlaine ? 0.1 ml/kg to 0.3 inlikg diluted (1: I0,000) Routs : (1) Intravenous (umbilical vein) or (2) Endotracheal Indication ? HR < 60/min after 30 sec. of positive pressure ventilation & chest compression
ARC-Easy
arc_04_01838
Which items would best protect a group of students while investigating a forest ecosystem?
[ "short pants and T-shirts", "short pants and long-sleeved shirts", "long pants and T-shirts", "long pants and long-sleeved shirts" ]
D
null
openbookqa
obqa_02_04781
Charring is a result of
[ "open flames", "the sun", "the moon", "ice" ]
A
fire causes burning
medmcqa
medmcqa_05_00226
Which of the following suggests that a paicular case of hepatitis B is highly infective?
[ "HbsAg +ve", "HBsAg + HBeAg", "Anti HbsAg", "Anti HbeAg" ]
B
HBsAg in the serum is the first evidence of infection, HBeAg indicates viral replication and infectivity. Patients who are HBsAg and HBeAg positive indicates that they are highly infective. Anti HBsAg appear in individuals after clearence of HBsAg and is also present in individuals after successful vaccination. Referen...
sciq
sciq_01_11100
Changing the frequency of sound waves, will change the _________ of the sound of a musical instrument?
[ "direction", "velocity", "distance", "pitch" ]
D
All musical instruments create sound by causing matter to vibrate. Most musical instruments use resonance to amplify sound waves and make sounds louder. Most musical instruments also have a way of changing the frequency of sound waves, which changes the pitch of the sounds.
openbookqa
obqa_02_00662
Electricity from a power plant lights up a light bulb in a house because
[ "a conductor is unnecessary", "there is only one conductor", "a conductor inside the house contacts a conductor outside the house", "the house is free of conductors" ]
C
if one electrical conductor contacts another electrical conductor then electricity will flow through both conductors
sciq
sciq_01_00062
A growth spurt requires constant divisions of what?
[ "cells", "proteins", "hairs", "seeds" ]
A
To grow and develop, you must form new cells. Imagine how often your cells must divide during a growth spurt. Growing just an inch requires countless cell divisions. Your body must produce new bone cells, new skin cells, new cells in your blood vessels and so on.
sciq
sciq_01_00033
What type of ions do ionic compounds contain?
[ "positive and negative", "positive and charged", "negative and neutal", "regular and irregular" ]
A
An ionic compound contains positive and negative ions.
sciq
sciq_01_07786
Simple eyes, like the human eye, have how many lenses?
[ "two", "one", "four", "none" ]
B
The head generally has several simple eyes and a pair of compound eyes. Simple eyes have a single lens, like the human eye. Compound eyes have many lenses.
medmcqa
medmcqa_05_01180
Positive sense nucleic acid genome is found in -
[ "Polio virus", "Papovavirus", "Influenza", "Picornavirus" ]
A
The genome of polio virus is a positive sense RNA REF:ANANTHANARYANAN TEXT BOOK OF MICROBIOLOGY 9EDITION PGNO.485
sciq
sciq_01_10854
What is usually necessary to develop cancer?
[ "crucial genes mutations", "massive genes mutations", "multiple genes mutations", "novel genes mutations" ]
C
Usually mutations in multiple genes are necessary to develop cancer.
math_qa
mathqa_03_01065
if a rectangular billboard has an area of 91 square feet and a perimeter of 40 feet , what is the length of each of the shorter sides ?
[ "4", "7", "8", "13" ]
B
"this question can be solved algebraically or by testing the answers . we ' re told that a rectangle has an area of 91 and a perimeter of 40 . we ' re asked for the length of one of the shorter sides of the rectangle . since the answers are all integers , and the area is 91 , the shorter side will almost certainly be l...
math_qa
mathqa_03_03389
what will be the fraction of 5 %
[ "1 / 20", "1 / 50", "1 / 75", "1 / 25" ]
A
"explanation : 5 * 1 / 100 = 1 / 20 . option a"
sciq
sciq_01_01295
What happens to an animal's telomeres as it ages?
[ "divide", "shorten", "multiply", "lengthen" ]
B
As cells divide, their chromosomes get shorter. This is because the telomeres, the DNA sequences at both ends of a chromosome, lose material every time the DNA is replicated. The older the animal is, the shorter its telomeres will be, because of the number of cell cycles the cells have been through This is a natural pa...
sciq
sciq_01_10796
What holds together the small molecules called nucleotides which make up nucleic acids?
[ "curvature bonds", "dissonance bonds", "permanent bonds", "covalent bonds" ]
D
Nucleic acids consist of chains of small molecules called nucleotides, which are held together by covalent bonds.
math_qa
mathqa_03_04057
a train 140 m long is running with a speed of 50 km / hr . in what time will it pass a man who is running at 4 km / hr in the direction opposite to that in which the train is going ?
[ "8.1", "7.0", "9.33", "8" ]
C
"speed of train relative to man = 50 + 4 = 54 km / hr . = 54 * 5 / 18 = 15 m / sec . time taken to pass the men = 140 * 1 / 15 = 9.33 sec . answer : option c"
sciq
sciq_01_01159
What are complex organic molecules that make up cells?
[ "acids", "proteins", "carbohydrates", "sugars" ]
B
Amino acids are molecules of carbon, hydrogen, and oxygen. These molecules are called the building blocks of life because they create proteins. Proteins are complex organic molecules that make up cells. They are the most abundant class of biological molecules.
openbookqa
obqa_02_03098
Which is least likely to happen?
[ "a human goes from teenager to adult", "a human goes from child to preteen", "a human goes from teenager to child", "a human goes from infant to toddler" ]
C
adulthood is a stage in the life cycle process
openbookqa
obqa_02_04707
A typhoon can potentially cause
[ "diminished lakes", "overflowing wetness", "population floods", "rivers drying" ]
B
heavy rains cause flooding
math_qa
mathqa_03_03335
f ( x ) is a function such that f ( x ) + 3 f ( 8 - x ) = x for all real numbers x . find the value of f ( 2 ) .
[ "5", "4", "3", "2" ]
D
f ( x ) + 3 f ( 8 - x ) = x : given f ( 2 ) + 3 f ( 6 ) = 2 : x = 2 above f ( 6 ) + 3 f ( 2 ) = 6 : x = 6 above f ( 6 ) = 6 - 3 f ( 2 ) : solve equation c for f ( 6 ) f ( 2 ) + 3 ( 6 - 3 f ( 2 ) ) = 2 : substitute f ( 2 ) = 2 : solve above equation . correct answer is d ) 2
math_qa
mathqa_03_04929
there are two circles of different radii . the are of a square is 784 sq cm and its side is twice the radius of the larger circle . the radius of the larger circle is 7 - third that of the smaller circle . find the circumference of the smaller circle .
[ "165 ∏ cm", "65 ∏ cm", "12 ∏ cm", "14 ∏ cm" ]
C
let the radii of the larger and the smaller circles be l cm and s cm respectively . let the side of the square be a cm . a 2 = 784 = ( 4 ) ( 196 ) = ( 22 ) . ( 142 ) a = ( 2 ) ( 14 ) = 28 a = 2 l , l = a / 2 = 14 l = ( 7 / 3 ) s therefore s = ( 3 / 7 ) ( l ) = 6 circumference of the smaller circle = 2 ∏ s = 12 ∏ cm . a...
sciq
sciq_01_01080
How long does it take for earth to rotate on it's axis one time?
[ "6 hours", "26 hours", "12 hours", "24 hours" ]
D
Earth rotates on its axis every 24 hours.
medmcqa
medmcqa_05_02086
Which of the following is an end product of glycosis in an RBC?
[ "Lactic acid", "Acettyl CoA", "Enters krebs cycle", "Ethanol" ]
A
Erythrocytes:Major Pathways: Anaerobic glycolysis, pentose phosphate pathwayMain Substrates: GlucoseMajor Products Expoed: Latic acid, lactateSpecialist Enzymes: Hemoglobin, enzymes of pentose phosphate pathwayRef: Harper&;s Biochemistry, 30th edition, page no: 150
sciq
sciq_01_02075
Which is the dominant stage of the lifecycle of a fern?
[ "zygote", "gametophyte", "larvae", "sporophyte" ]
D
The dominant stage of the lifecycle of a fern is the sporophyte, which consists of large compound leaves called fronds. Fronds fulfill a double role; they are photosynthetic organs that also carry reproductive organs. The stem may be buried underground as a rhizome, from which adventitious roots grow to absorb water an...
sciq
sciq_01_09787
Often determining the strength or intensity of a wave, this term is the distance from the equilibrium point of motion to either its lowest or highest point?
[ "density", "peak", "amplitude", "frequency" ]
C
The amplitude , , is the distance from the equilibrium (or center) point of motion to either its lowest or highest point ( end points ). The amplitude, therefore, is half of the total distance covered by the oscillating object. The amplitude can vary in harmonic motion but is constant in SHM. The amplitude of a wave of...
ARC-Challenge
arc_04_02699
As part of a study, a scientist observed a number of different molecular changes in matter. Which of the following observations provides evidence of a physical change?
[ "using heat to burn a log in a fireplace", "using light to produce sugar in plants", "a cake that was baked from many ingredients", "a bottle that was broken into many small pieces" ]
D
null
medmcqa
medmcqa_05_03902
Which of the following is the most impoant prognostic factor in breast cancer?
[ "Histological grade of the tumor", "Stage of the tumor at the time of diagnosis", "Status of estrogen and progesterone receptors", "Over expression of p-53 tumour suppressor gene" ]
B
Components of tumor staging include major prognostic factors such as tumor size, invasion of the tumor, nodal involvement, distant metastases, inflammation and local features. Hence, stage of the tumor at the time of diagnosis is a better predictor of prognosis. Ref: Bailey and Love's Sho Practice of Surgery, 24th Edit...
sciq
sciq_01_05916
What is the modern periodic table based on?
[ "element density", "metallic number", "atomic number", "element mass" ]
C
The modern periodic table is based on atomic number. Elements in each period go from metals on the left to metalloids and then nonmetals on the right. Within groups, elements have similar properties.