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7.76k
sciq
sciq_01_00785
Centrioles are a very important part of what?
[ "centrosomes", "centricles", "enterocytes", "tubercles" ]
A
Centrioles are a very important part of centrosomes, which are involved in organizing microtubules in the cytoplasm. Centrosomes are associated with the nuclear membrane during prophase of the mitosis. In mitosis, the nuclear membrane breaks down and the microtubule organizing center (MTOC) of the centrosome arranges m...
sciq
sciq_01_09283
What involves the reaction of a hydrocarbon with oxygen gas to produce water and carbon dioxide?
[ "hydrogen reactions", "material reactions", "combustion reactions", "chemical reactions" ]
C
Combustion reactions involve the reaction of a hydrocarbon with oxygen gas to produce water and carbon dioxide.
ARC-Challenge
arc_04_02822
Which would most likely need to happen for a new plant to grow?
[ "Leaves grow out of a stem.", "Insects get attracted to the petals.", "A blossom falls into the soil.", "A seed sprouts into a seedling." ]
D
null
sciq
sciq_01_03130
Latitude affects the amount of which radiation a place receives?
[ "solar", "surface", "thermal", "molecular" ]
A
Latitude affects the amount of solar radiation a place receives.
openbookqa
obqa_02_03318
What is lava found above?
[ "natures floor", "grounded lightning", "sky", "ground images" ]
A
lava is found above the ground
openbookqa
obqa_02_00062
Which animal emits something that many autistic people would be extra sensitive to?
[ "cow", "dog", "cat", "skunk" ]
D
a skunk produces a bad odor
math_qa
mathqa_03_03902
6 workers should finish a job in 8 days . after 3 days came 4 workers join them . how many days m do they need to finish the same job ?
[ "3", "4", "5", "6" ]
A
"let rate of one worker be r = > ( 6 * r ) * 8 = 1 ( rate * time = work ) = > r = 1 / 48 = > work remaining after 3 days 1 - ( 3 * 6 ) / 48 = 30 / 48 after 4 ppl joined in ( ( 6 + 4 ) * time ) / 48 = 30 / 48 time m = 3 days to finish the task imo a"
sciq
sciq_01_08200
What kind of systems use fluid to transmit pressure and increase force?
[ "electromagnetic systems", "thermal systems", "plumbing systems", "hydraulic systems" ]
D
Hydraulic car lifts also use fluid to transmit pressure and increase force. The lifts are used to raise cars, which are very heavy, so mechanics can work on them from underneath. Controls in airplanes use fluids to transmit pressure and increase force so a flick of a switch can raise or lower heavy landing gear. To see...
sciq
sciq_01_01895
What is used to prevent some infectious diseases?
[ "pathogens", "vaccines", "pesticides", "radiation" ]
B
Vaccines are available for some infectious diseases. For example, there are vaccines to prevent measles, mumps, whooping cough, and chicken pox. These vaccines are recommended for infants and young children.
medmcqa
medmcqa_05_04480
Extensor carpi radialis longus is a/an -
[ "Wrist extensor", "Wrist adductor", "Extensor of MCP joint", "Extensor of IP joint" ]
A
Ans. is 'a' i.e., Wrist extensoro Extensor carpi radialis longus causes :-i) Extension of wristii) Abduction of wristo It is supplied by radial nerve.
medmcqa
medmcqa_05_01041
Metabolic bone disease is caused by excess intake of which vitamin?
[ "A", "B", "C", "D" ]
A
Metabolic bone disease is caused by excess intake of vitamin -A.Retinoic acid has a role in the regulation of gene expression and differentiation of tissues. All-trans-retinoic acid and 9-cis retinoic acid act like steroid hormones. They bind to nuclear receptors; retinoic acid along with the receptor binds to the resp...
medmcqa
medmcqa_05_04205
Which of the following pain is not referred to ear?
[ "Pharynx", "Teeth", "Angle of TM joint", "Vestibule of nose" ]
D
ANSWER: (D) Vestibule of noseREF: Dhingra's 4th ed p.144The ear is supplied by Vth (auriculotemporal), IX th (tympanic br.) and X th (auricular br.) nerve and C2 (lesser occipital), C3 and C4 (greater auricular)Pain may be referred to ear from one of the following:I. Via Vth nerve:Dental: caries , molar impaction and d...
sciq
sciq_01_05530
What is the column of hot rock that continuously brings hot rock up from the mantle toward the crust?
[ "flue", "mantle plume", "volcanic vent", "hotspot" ]
B
Some volcanoes form over active hotspots . Scientists count about 50 hotspots on the Earth. Hotspots lie directly above a column of hot rock called a mantle plume . Mantle plumes continuously bring hot rock up from the mantle toward the crust ( Figure below ). The rock melts due to the release of pressure.
openbookqa
obqa_02_04668
Thicker layers of skin would best suit
[ "a bird", "a scorpion", "a lizard", "a leopard seal" ]
D
as the thickness of an object increases , the resistance to damage of that object will increase
sciq
sciq_01_08117
In what type of mining must tunnels be blasted into the rock so that miners and equipment can get to the ore?
[ "strip mining", "underground mining", "open-pit mining", "gold mining" ]
B
If an ore is deep below Earth’s surface it may be too expensive to remove all the rock above it. These deposits are taken by underground mining. Underground mines can be very deep. The deepest gold mine in South Africa is more than 3,700 m deep (that is more than 2 miles)! There are various methods of underground minin...
math_qa
mathqa_03_04340
two trains start simultaneously from opposite ends of a 150 - km route and travel toward each other on parallel tracks . train x , traveling at a constant rate , completes the 150 - km trip in 4 hours . train y , travelling at a constant rate , completes the 150 - km trip in 3.5 hours . how many kilometers had train x ...
[ "68", "70", "72", "74" ]
B
if the two trains cover a total distance d , then train x travels ( 7 / 15 ) * d while train y travels ( 8 / 15 ) * d . if the trains travel 150 km to the meeting point , then train x travels ( 7 / 15 ) * 150 = 70 km . the answer is b .
openbookqa
obqa_02_00057
A battery converts chemical energy into
[ "energy stored due to the relative positions of charged particles or electric fields", "energy stored due to the bombardment of particles", "energy stored between the cells of nonadjacent particles", "energy that is broken down in particles" ]
A
a battery converts chemical energy into electrical energy
sciq
sciq_01_09715
Aids is an infectious disease of which system?
[ "endocrine", "muscular", "digestion", "immune" ]
D
AIDS is an infectious disease of the immune system caused by a virus. Some diseases of the immune system are noninfectious. They include autoimmune diseases and allergies.
ARC-Easy
arc_04_01734
Which of these characteristics best helps scientists classify organisms?
[ "size", "color", "gender", "structure" ]
D
null
medmcqa
medmcqa_05_02658
Which is the commonest benign tumor of liver?
[ "Haematoma", "Hemangioma", "Adenoma", "Nodular focal hyperplasia" ]
B
Cavernous hemangioma is the most common benign tumor of the liver. It is a vascular mass that is not neoplastic and is composed of dilated blood vessels. They are usually small and are located immediately beneath the fibrous capsule of the liver. Liver cell adenoma is a benign neoplasm of hepatocytes and is found in yo...
medmcqa
medmcqa_05_02878
Most common cause of acute bacterial endocarditis is:September 2009
[ "Staphylococcus aureus", "Streptococcus viridans", "Streptococcus intermedius", "Candida albicans" ]
A
Ans. A: Staphylococcus aureusOverall, S aureus infection is the most common cause of Infective Endocarditis (IE), including acute IE, and Intravenous drug abusers IE.More than half the cases are not associated with underlying valvular disease.Streptococcus viridans accounts for approximately 50-60% of cases of subacute...
ARC-Easy
arc_04_01074
To which planet do National Aeronautics and Space Administration (NASA) scientists hope to send humans next?
[ "Mars", "Venus", "Jupiter", "Mercury" ]
A
null
medmcqa
medmcqa_05_01175
After 20 weeks of gestation main contribution of amniotic fluid is by:
[ "Fetal urine", "Maternal serum filtered through placenta", "Transudate of fetal plasma through fetal skin", "Transudate across umbilical cord" ]
A
Ans: a (Fetal urine) Ref: Dutta, 6th ed, p. 37After 20 weeks of gestation the main contribution of amniotic fluid is by fetal urine. The fetal daily urine output at term is about 400-1200 ml.Theories on origin of amniotic fliud1. Asa transudate from maternal serum2. As a transudate across umbilical cord or from the fet...
sciq
sciq_01_02070
Chitin is a substance that is found in what part of animals like beetles and lobsters?
[ "tails", "eggs", "brains", "shell" ]
D
The cell walls in many species of fungi contain chitin. Chitin is tough carbohydrate found in the shells of animals such as beetles and lobsters. The cell wall of a plant is made of cellulose, not chitin.
medmcqa
medmcqa_05_01931
Aseptic loosening in cemented total hip replacement occurs as a result of hypersensitivity response to -
[ "Titanium debris", "High density polythene debris", "N.N - Dimethyltryptamine (DMT)", "Free radicals" ]
B
Based on the type of fixation, THR is of two types:- i) Cemented THR: Bone cement is used to fix the prosthesis with bone. ii) Uncemented THR: Prosthesis is directly inserted into the bone without using cement. After sometime osteointegration over prosthesis takes place. In cemented THR, there may be loosening of the...
ARC-Easy
arc_04_00959
Which type of rock would most likely contain a fossil?
[ "metamorphic rock", "sedimentary rock", "igneous rock", "molten rock" ]
B
null
sciq
sciq_01_08989
Many enzymes are simple proteins consisting entirely of one or more of these?
[ "amino acid chains", "alkali acid chains", "proteins acid chains", "interaction acid chains" ]
A
Many enzymes are simple proteins consisting entirely of one or more amino acid chains. Other enzymes contain a nonprotein component called a cofactor that is necessary for the enzyme’s proper functioning. There are two types of cofactors: inorganic ions [e. , zinc or Cu(I) ions] and organic molecules known as coenzymes...
openbookqa
obqa_02_02330
High surface air temperatures, arid conditions, land overuse and over-population can all contribute to
[ "high humidity", "icebergs", "wildfires", "meteors" ]
C
drought may cause wildfires
sciq
sciq_01_02619
Within the petals are two whorls of fertile floral organs that produce what?
[ "toxins", "fibers", "spores", "leaves" ]
C
sciq
sciq_01_08295
What happens to temperature in the troposphere as the altitude increases?
[ "it decreases", "it increases", "it disappears", "it stays the same" ]
A
In the troposphere, temperature decreases with altitude. The troposphere gets some of its heat directly from the Sun. Most, however, comes from Earth's surface. The surface is heated by the Sun. Some of that heat radiates back into the air. This makes the temperature higher near the surface than at higher altitudes.
math_qa
mathqa_03_00567
at what rate percent per annum will a sum of money double in 2 years .
[ "34 %", "50 %", "11.5 %", "20 %" ]
B
"let principal = p , then , s . i . = p and time = 8 years rate = [ ( 100 x p ) / ( p x 2 ) ] % = 50 % per annum . answer : b"
sciq
sciq_01_04711
What is the main type of cell in the nervous system called?
[ "axon", "conduction", "neuron", "sensory" ]
C
Nervous Tissues Nervous tissues are made of cells specialized to receive and transmit electrical impulses from specific areas of the body and to send them to specific locations in the body. The main cell of the nervous system is the neuron, illustrated in Figure.
medmcqa
medmcqa_05_00068
Which of the following is specific for albinism among the following?
[ "Red reflex", "Decreased visual activity", "Photophobia", "Nystagmus" ]
A
(Refer: AK Khurana Comprehensive Ophthalmology, 6th edition, pg no. 467 - 474) *All the given options are seen in albinism. But, a red reflex is specific *Ocular features in albinism: Red reflex Pink or blue iris Dazzling glare Photophobia Decreased vision Nystagmus Clear retinal and choroidal vessels, separated by gli...
ARC-Easy
arc_04_00292
John has diabetes. Which of the following should he be careful about eating or drinking?
[ "beef", "eggs", "milk", "fruit juice" ]
D
null
math_qa
mathqa_03_01404
the malibu country club needs to drain its pool for refinishing . the hose they use to drain it can remove 60 cubic feet of water per minute . if the pool is 50 feet wide by 150 feet long by 10 feet deep and is currently at 80 % capacity , how long will it take to drain the pool ?
[ "1000 min", "1200 min", "1300 min", "1400 min" ]
A
volume of pool = 50 * 150 * 10 cu . ft , 80 % full = 50 * 150 * 10 * 0.8 cu . ft water is available to drain . draining capacity = 60 cu . ft / min therefore time taken = 50 * 150 * 10 * 0.8 / 60 min = 1000 min a
math_qa
mathqa_03_03486
3 friends a , b , c went for week end party to mcdonald ’ s restaurant and there they measure there weights in some order in 7 rounds . a , b , c , ab , bc , ac , abc . final round measure is 165 kg then find the average weight of all the 7 rounds ?
[ "94.2 kgs", "88.5 kgs", "86.5 kgs", "67.5 kgs" ]
A
"average weight = [ ( a + b + c + ( a + b ) + ( b + c ) + ( c + a ) + ( a + b + c ) ] / 7 = 4 ( a + b + c ) / 7 = 4 x 165 / 7 = 94.2 kgs answer : a"
medmcqa
medmcqa_05_02437
The inability to perceive the texture & shape an object occurs in a lesion of
[ "Lateral spino-thalamic tract", "Nucleus gracilis", "Spino reticular tract", "Nucleus cuneatus" ]
D
Though both nucleus cuneatus & nucleus gracilis are correct, since it is a single answer question, the best answer would be tractus cuneatus, as we commonly use hands to recognize size and shape of objects, more than the foot. Somatosensory cortex lesion- proprioception and tactile sensations are lost while pain and te...
sciq
sciq_01_03623
Falling onto what joint can fracture the distal humerus?
[ "Foot", "thumb", "knee", "elbow" ]
D
Figure 8.11 Fractures of the Humerus and Radius Falls or direct blows can result in fractures of the surgical neck or shaft of the humerus. Falls onto the elbow can fracture the distal humerus. A Colles fracture of the distal radius is the most common forearm fracture.
sciq
sciq_01_03635
How many millions of years ago did pangaea begin breaking apart?
[ "400", "500", "600", "250" ]
D
Pangaea has been breaking apart since about 250 million years ago. Divergent plate boundaries formed within the continents to cause them to rift apart. The continents are still moving apart. The Pacific is shrinking as the Atlantic is growing. The Appalachians ( Figure below ) are now on a passive margin. The mighty mo...
sciq
sciq_01_04917
In a science lab, what device would you use to measure the volume of a liquid?
[ "Richter scale", "anemometer", "graduated cylinder", "yardstick" ]
C
Measuring devices must be used correctly to get accurate measurements. Figure below shows the correct way to use a graduated cylinder to measure the volume of a liquid.
medmcqa
medmcqa_05_03658
Growth spu in girls occurs in which stage of pubey?
[ "Stage 2", "Stage 3", "Stage 4", "Stage 5" ]
B
Growth spu in girls occurs in stage 3 of pubey Boys- occurs in stage 4.
openbookqa
obqa_02_03151
if a tree fell down and dried with a hole in it, which of these would likely be in it?
[ "A two hundred pound lion", "a great white shark", "a striped tail nut eater", "a wild female antelope" ]
C
some raccoons live in hollow logs
math_qa
mathqa_03_03492
a , b and c have rs . 300 between them , a and c together have rs . 200 and b and c rs . 350 . how much does c have ?
[ "a", "b", "c", "d" ]
A
"a + b + c = 300 a + c = 200 b + c = 350 - - - - - - - - - - - - - - a + b + 2 c = 550 a + b + c = 300 - - - - - - - - - - - - - - - - c = 250 answer : a"
openbookqa
obqa_02_04438
Laser anemometers help manufacturers of cars, airplanes and spacecraft to produce efficient vehicle designs that
[ "increase the gas mileage of the vehicles", "increase the drag from air moving past them", "decrease exhaust fumes from the vehicles", "reduce resistance from air moving past them" ]
D
an anemometer is used to measure wind speed
ARC-Easy
arc_04_01171
A genetic mutation has caused the fur color of field mice to contrast with their environment. This type of mutation will most likely
[ "benefit the mice.", "harm the mice.", "increase reproductive rates.", "decrease competition for resources." ]
B
null
sciq
sciq_01_04836
What is caused when circulating blood puts pressure on the walls of blood vessels?
[ "aneurysm", "high cholesterol", "blood pressure", "atherosclerosis" ]
C
Blood pressure occurs when circulating blood puts pressure on the walls of blood vessels.
sciq
sciq_01_00411
What are passed from one generation to the next so species can survive?
[ "mutations", "fluctuations", "selections", "adaptatioins" ]
D
openbookqa
obqa_02_03352
how does an animal know to perform certain crucial life actions before exposure to it?
[ "it is built into their very being", "it is taught in school", "they are trained at a special school", "they have magical powers" ]
A
An example of an instinct is the kangaroo 's ability to crawl into its mother 's pouch to drink milk
sciq
sciq_01_04239
Because complex plant carbohydrates such as cellulose are more difficult to digest, what animal diet is associated with a complicated digestive system?
[ "polyvore", "herbivore", "omnivore", "carnivore" ]
B
Different diets require different types of digestive systems. Mammals that eat a carnivorous diet generally have a relatively simple digestive system. Their food consists mainly of proteins and fats that are easily and quickly digested. Herbivorous mammals, on the other hand, tend to have a more complicated digestive s...
ARC-Easy
arc_04_02004
Most underground caves are formed by the action of water on
[ "granite", "limestone", "sandstone", "shale" ]
B
null
math_qa
mathqa_03_03809
a shopkeeper sells 20 % of his stock at 10 % profit ans sells the remaining at a loss of 5 % . he incurred an overall loss of rs . 450 . find the total worth of the stock ?
[ "20029", "22500", "20289", "20027" ]
B
"let the total worth of the stock be rs . x . the sp of 20 % of the stock = 1 / 5 * x * 1.1 = 11 x / 50 the sp of 80 % of the stock = 4 / 5 * x * 0.95 = 19 x / 25 = 38 x / 50 total sp = 11 x / 50 + 38 x / 50 = 49 x / 50 overall loss = x - 49 x / 50 = x / 50 x / 50 = 450 = > x = 22500 answer : b"
sciq
sciq_01_01309
The general term peptide refers to an amino acid chain of what?
[ "large length", "unspecified length", "small length", "incomplete length" ]
B
The general term peptide refers to an amino acid chain of unspecified length. However, chains of about 50 amino acids or more are usually called proteins or polypeptides. In its physiologically active form, a protein may be composed of one or more polypeptide chains. For peptides and proteins to be physiologically acti...
ARC-Challenge
arc_04_02390
Which conclusion should the students make from the information in the table?
[ "There are more plant-like organisms.", "There are more animal-like organisms.", "The plant-like organisms cannot move by themselves.", "The animal-like organisms eat the plant-like organisms." ]
A
null
sciq
sciq_01_04417
What takes place directly after developing a hypothesis in the scientific method process?
[ "testing the hypothesis", "gathering materials", "making a conclusion", "independent variables" ]
A
Scientific method is a process consisting of making observations, developing a hypothesis, and testing that hypothesis.
sciq
sciq_01_09919
What is the pair of bean-shaped organs that filters blood and produces urine?
[ "lungs", "heart", "kidneys", "arteries" ]
C
The kidneys are a pair of bean-shaped organs just above the waist. They are important organs with many functions in the body, including producing hormones, absorbing minerals, and filtering blood and producing urine.
math_qa
mathqa_03_03209
daal is now being sold at rate rs . 20 a kg . during last month its rate was rs 16 per kg . by how reduce percent should a family its consumption so as to keep the expenditure fixed ?
[ "10 %", "20 %", "30 %", "40 %" ]
B
last month rate = 16 per kg this month rate = 20 per kg if 20 = 100 % then 16 = ? therefore % = ( 16 * 100 ) / 20 = 80 % to reduce consumption 100 - 80 = 20 % answer : b
sciq
sciq_01_01796
In classical conditioning, a response called the conditioned response is associated with what?
[ "external inhibition", "blocking effect", "unconditioned stimulus", "conditioned stimulus" ]
D
Conditioned Behavior Conditioned behaviors are types of associative learning, where a stimulus becomes associated with a consequence. During operant conditioning, the behavioral response is modified by its consequences, with regards to its form, strength, or frequency. Classical Conditioning In classical conditioning, ...
sciq
sciq_01_09709
What noble gas follows hydrogen on the periodic table?
[ "helium", "halogen", "nitrogen", "oxygen" ]
A
Following hydrogen is the noble gas helium, which has an atomic number of 2. The helium atom contains two protons and two electrons. The first electron has the same four quantum numbers as the hydrogen atom electron (n = 1, l = 0, ml = 0, m s = + 1 ). The second electron also goes into the 1s orbital and fills that orb...
sciq
sciq_01_11627
What helps represent age-sex structure of the population?
[ "density graph", "habitat chart", "population pyramid", "biome model" ]
C
The age-sex structure of a population is the number of individuals of each sex and age in the population. Age-sex structure influences population growth. It is represented by a population pyramid. The number of survivors at each age is plotted on a survivorship curve.
medmcqa
medmcqa_05_02683
Shivering is most commonly seen with use of –
[ "Halothane", "Cyclopropane", "Ether", "Thiopentone" ]
A
Halothane is the most common inhalational agent which is associated with post-operative shivering (Halothane shakes).
math_qa
mathqa_03_04232
1394 x 1394 = ?
[ "a", "b", "c", "d" ]
D
"1394 x 1394 = ( 1394 ) 2 = ( 1400 - 6 ) 2 = ( 1400 ) 2 + ( 6 ) 2 - ( 2 x 1400 x 6 ) = 1960000 + 36 - 16800 = 1960036 - 16800 = 1943236 . answer : d"
sciq
sciq_01_08511
The following definition relates to which term: the application of knowledge to real-world problems?
[ "capitalism", "industry", "invention", "technology" ]
D
Technology is the application of knowledge to real-world problems. It includes methods and processes as well as devices like computers and cars. An example is the Bessemer process. It is a cheap method of making steel that was invented in the 1850s. It is just one of many technological advances that have occurred in ma...
sciq
sciq_01_05776
What does the stable form of sulfur at room temperature contain?
[ "electron shell", "eight-membered rings", "four - membered rings", "six - membered rings" ]
B
Larger amounts of sulfur also come from hydrogen sulfide recovered during the purification of natural gas. Sulfur exists in several allotropic forms. The stable form at room temperature contains eight-membered rings, and so the true formula is S8. However, chemists commonly use S to simplify the coefficients in chemica...
sciq
sciq_01_03318
What is the process for developing knowledge called?
[ "science", "theory", "evolution", "creationism" ]
A
Science is a process for developing knowledge. Change in knowledge about the natural world is expected because there is often room for new observations which may challenge current views. No matter how well one theory explains a set of observations, it is possible that a different theory may explain them just as well or...
openbookqa
obqa_02_03325
Which is most accurate?
[ "dams can capture powerful gusts and harness their power", "windmills can capture lightning bolts and harness their power", "dams can capture lightning bolts and harness their power", "windmills can capture powerful gusts and harness their power" ]
D
wind is a source of energy
sciq
sciq_01_07811
What causes blood vessels to grow toward the tumour in cancer cells?
[ "addressing molecules", "signaling molecules", "harnessing molecules", "communicating molecules" ]
B
sciq
sciq_01_08399
What is a measure of the amount of space a substance or an object takes up?
[ "density", "volume", "speed", "mass" ]
B
Volume measures the amount of space that a substance or an object takes up. The basic SI unit for volume is the cubic meter (m 3 ).
openbookqa
obqa_02_02734
If a thing is procreating, then it is
[ "under age", "too old", "young", "aged enough" ]
D
reproduction occurs during adulthood
sciq
sciq_01_05730
What type of acid is often used as a preservative for acidic foods such as fruit juices?
[ "benzoic acid", "citric acid", "sulfuric acid", "hydrochloric acid" ]
A
Benzoic acid crystals in polarized light are pictured above. Benzoic acid is widely used as a food preservative, either as the carboxylic acid or as the sodium benzoate salt. This compound is most effective when added to acidic foods such as fruit juices and soft drinks. The major industrial source of benzoic acid is t...
medmcqa
medmcqa_05_03806
Dohle bodies are seen in
[ "Multiple myeloma", "May-hegglin anomaly", "Waldenstrom macroglobulinemia", "Lymphoma" ]
B
Dohle bodies are patches of dilated endoplasmic reticulum that appear as sky-blue cytoplasmic "puddles.*. Seen in burns, infections, physical trauma, neoplastic diseases, May-Hegglin anomaly etc.*Multiple myeloma and Waldenstrom&;s macroglobulinemia- Both are plasma cells dyscrasias. These plasma cells may have intracy...
sciq
sciq_01_09253
What are polymers composed of many sugar building blocks called?
[ "polysaccharides", "hydrocarbons", "monomers", "monosaccarides" ]
A
medmcqa
medmcqa_05_03345
Which of the following does not indicate Heapatitis B replication?
[ "HBcAg", "HBeAg", "HBV DNA", "Viral copies" ]
A
Ans. a. HBcAg
math_qa
mathqa_03_01357
if 21 lines are drawn in a plane such that no two of them are parallel and no three are concurrent , then in how many points do they intersect ?
[ "150", "170", "190", "210" ]
D
"if two lines are not parallel , then they will intersect in exactly one point . lines can be extended infinitely on both ends so somewhere they will intersect with each other if they are not parallel . we are also given that no three lines are concurrent . this means that no three lines intersect at the same point . s...
medmcqa
medmcqa_05_03229
Positive schick's test indicates that the person is ?
[ "Immune to diphtheria", "Hypersensitive to diphtheria", "Susceptible to diphtheria", "Susceptible and hypersensitive to diphtheria" ]
C
Ans. is c i.e., Susceptible to diphtheria o Shick test is no longer in use. It was used for the susceptibility of for diphtheria. o It was an intradermal test, in which after intradermal injections of diphtheria toxin in one forearm (usually left) and toxoid in other forearm two readings were taken one at 24-48 hrs and...
openbookqa
obqa_02_02404
Where would a sand dune be out of the ordinary?
[ "the Sahara desert", "the Iraqi Desert", "the Gobi Desert", "Kansas" ]
D
sand dunes are made of sand
ARC-Easy
arc_04_00901
Which element is necessary for the formation of coal?
[ "crushed rocks", "flowing water", "dead animals", "decaying vegetation" ]
D
null
sciq
sciq_01_10810
Life itself could not exist without what energy, which plays a vital role in photosynthesis?
[ "light energy", "magnetic energy", "time energy", "spin energy" ]
A
Our lives are filled with light. Through vision, the most valued of our senses, light can evoke spiritual emotions, such as when we view a magnificent sunset or glimpse a rainbow breaking through the clouds. Light can also simply amuse us in a theater, or warn us to stop at an intersection. It has innumerable uses beyo...
medmcqa
medmcqa_05_01882
In classical Mendelian inheritance, autosomal dominant disease characterized by:
[ "Complete penetrance", "Parents are unaffected", "Very early onset in life", "Variable expressivity" ]
D
Autosomal dominant disease -Variable expressivity -Incomplete penetrance -Both parents are affected -No skipping of generations
math_qa
mathqa_03_02803
working at constant rate , pump x pumped out half of the water in a flooded basement in 3 hours . the pump y was started and the two pumps , working independently at their respective constant rates , pumped out rest of the water in 3 hours . how many hours would it have taken pump y , operating alone at its own constan...
[ "a . 20", "b . 12", "c . 14", "d . 18" ]
A
"rate of x = 1 / 8 rate of x + y = 1 / 6 rate of y = 1 / 6 - 1 / 8 = 1 / 24 20 hours a"
openbookqa
obqa_02_03917
An example of conservation is avoiding the use of
[ "clothes", "gasoline", "snow", "air" ]
B
when available resources decrease in an environment , organisms have to conserve those resources
math_qa
mathqa_03_04795
an aeroplane covers a certain distance of 530 kmph in 5 hours . to cover the same distance in 3 2 / 3 hours , it must travel at a speed of
[ "440", "540", "640", "722" ]
D
"speed of aeroplane = 530 kmph distance travelled in 5 hours = 530 * 5 = 2650 km speed of aeroplane to acver 2650 km in 11 / 3 = 2650 * 3 / 11 = 722 km answer d"
ARC-Easy
arc_04_00391
Which rapid changes can be caused by storms?
[ "landslides and flooding", "flooding and earthquakes", "landslides and volcanoes", "volcanoes and earthquakes" ]
A
null
math_qa
mathqa_03_00998
the weight of 4 dogs is determined to be 25 pounds , 31 pounds , 35 pounds and 33 pounds respectively . the weight of a fifth dog is determined to be y pounds . if the average ( arithmetic mean ) weight of the first 4 dogs is the same as that of all 5 dogs what is the value of y ?
[ "31", "33", "35", "37" ]
A
total weight of the 4 dogs = ( 25 + 31 + 35 + 33 ) = 124 avg = 124 / 4 = 31 total weight of 5 dogs = 124 + y or 4 ( 31 ) + y average of 5 dogs as per question = 31 equation : 4 ( 31 ) + y = 5 ( 31 ) , or y = 31 . choose a
sciq
sciq_01_04063
What are the tiny packets of energy the sun gives off called?
[ "photons", "electrons", "ions", "neutrons" ]
A
The Sun gives off energy in tiny packets called photons . Photons travel in waves. Figure below models a wave of light. Notice the wavelength in the figure. Waves with shorter wavelengths have more energy.
medmcqa
medmcqa_05_01826
In negative staining -
[ "The structure to be demonstrated is stained", "The structure to be demonstrated is not stained", "The background is not stained", "The background and structure are stained" ]
B
Negative staining is an established method, often used in diagnostic microscopy, for contrasting a thin specimen with an optically opaque fluid. In this technique, the background is stained, leaving the actual specimen untouched, and thus visible. This contrasts with 'positive staining', in which the actual specimen is...
sciq
sciq_01_06036
Most amphibians breathe with these as larvae?
[ "nostrils", "pores", "gills", "lungs" ]
C
Amphibian skin contains keratin, a protein that is also found in the outer covering of most other four-legged vertebrates. The keratin in amphibians is not too tough to allow gases and water to pass through their skin. Most amphibians breathe with gills as larvae and with lungs as adults. However, extra oxygen is absor...
openbookqa
obqa_02_03234
A ceramic dish from the dishwasher will be
[ "dirty", "cold", "clear", "warm" ]
D
a hot plate is a source of heat
sciq
sciq_01_09065
Bees are naturalized on every continent except which?
[ "North America", "antarctica", "Africa", "Australia" ]
B
Honeybees are one of the most well-known insects on the planet. Bees are naturalized on every continent except Antarctica. Honeybees have a highly developed social structure and depend on their community, or colony, for survival, with a colony containing up to 20,000 bees. When bees search plants for nectar, pollen sti...
math_qa
mathqa_03_03459
the current in a river is 4 mph . a boat can travel 18 mph in still water . how far up the river can the boat travel if the round trip is to take 10 hours ?
[ "69 miles", "85.5 miles", "96 miles", "100 miles" ]
B
"upstream speed = 18 - 4 = 14 mph downstream speed = 18 + 4 = 22 mph d / 14 + d / 22 = 10 hours solving for d we get d = 85.5 answer : b"
math_qa
mathqa_03_03120
find the average of all prime numbers between 80 and 100
[ "88", "60", "80", "89.6" ]
D
"prime numbers between 80 and 100 are 83 , 89 , 97 required average = ( 83 + 89 + 97 ) / 3 = 269 / 3 = 89.6 answer is d"
sciq
sciq_01_05671
What is the term for nutrients the body needs in relatively small amounts, including vitamins and minerals?
[ "minor nutrients", "micronutrients", "trace nutrients", "insignificant nutrients" ]
B
Nutrients the body needs in relatively small amounts are called micronutrients . They include vitamins and minerals. Vitamins are organic compounds that are needed by the body to function properly. Several vitamins are described in Table below . Vitamins play many roles in good health, ranging from maintaining good vis...
openbookqa
obqa_02_04927
People use hand dryers after washing their hands in order to
[ "fly", "Remove the fire", "clear away moisture", "go to space." ]
C
a hand dryer produces heat
medmcqa
medmcqa_05_00647
Which of the following occurs along with glucose transpo into a cell:
[ "Sodium sympo", "Sodium antepo", "Potassium transpo", "Amino acid transpo" ]
A
A i.e. Sodium sympoGlucose and Na+ share the same Co-transpoer (or sympo) - the sodium dependent glucose transpoer: (SGLT - sodium glucose co- transpoer)Q.Sodium dependent glucose transpoer (sympo)- Since the intracellular Nat concentration is low in intestinal & renal cells, Nat moves into the cells along its concentr...
openbookqa
obqa_02_00983
One full rotation on Earth's axis takes
[ "12 hours", "1 month", "2 days", "1440 minutes" ]
D
a Rotation of the Earth on Earth 's axis takes 1 day
medmcqa
medmcqa_05_03318
Coenzyme responsible for carboxylation reaction is:
[ "Biotin", "FAD", "NADH", "Thiamine pyrophosphate" ]
A
Biotin
math_qa
mathqa_03_02231
a certain class of students is being divided into teams . the class can either be divided into 10 teams with an equal number of players on each team or 24 teams with an equal number of players on each team . what is the lowest possible number of students in the class ?
[ "6", "36", "120", "60" ]
C
"let total no of students in the class be n so , we are told that n is divisible by both 10 24 so , lets find the least common multiple of 10 24 , ie 120 so our answer is ( c ) 120"
sciq
sciq_01_06920
What part of blood releases clotting factors?
[ "platelets", "hemoglobin", "erythrocytes", "white blood cells" ]
A
Platelets ( Figure below ) are very small, but they are very important in blood clotting. Platelets are not cells. They are sticky little pieces of larger cells. Platelets bud off large cells that stay in the bone marrow. When a blood vessel gets cut, platelets stick to the injured areas. They release chemicals called ...
sciq
sciq_01_02078
Do most substances increase or decrease in size when they change from a liquid to a solid?
[ "stay the same", "increase", "decrease", "it is unable to be measured" ]
C
This is how ice wedging works. When liquid water changes into solid ice, it increases in volume. You see this when you fill an ice cube tray with water and put it in the freezer. The ice cubes go to a higher level in the tray than the water. You also may have seen this if you put a can of soda into the freezer so that ...
sciq
sciq_01_04040
What type of numbers specify the arrangement of electrons in orbitals?
[ "ionic numbers", "stream numbers", "quantum numbers", "fusion numbers" ]
C
Quantum numbers specify the arrangements of electrons in orbitals.
sciq
sciq_01_04859
What group of elements cannot conduct electricity?
[ "carbonates", "nonmetals", "phosphates", "metals" ]
B
Nonmetals are elements that generally cannot conduct electricity. They are the second largest class of elements after metals. Examples of nonmetals include hydrogen, carbon, chlorine, and helium.