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7.76k
sciq
sciq_01_08281
What do the liver, gallbladder, and pancreas contribute that aid in digestion?
[ "contaminants", "crystals", "chemicals", "plasma" ]
C
The liver, gallbladder, and pancreas contribute chemicals that aid in digestion.
ARC-Easy
arc_04_00913
Which is the thickest layer of Earth?
[ "crust", "inner core", "mantle", "outer core" ]
C
null
sciq
sciq_01_09258
What is the sequence of elementary steps that together comprise an entire chemical reaction called?
[ "reaction mechanism", "mechanical mechanism", "reaction circle", "basic reaction" ]
A
The overall balanced equation for a chemical reaction does not always tell us how a reaction actually proceeds. In many cases, the overall reaction takes place in a series of small steps. An elementary step (or elementary reaction) is one step in a series of simple reactions that show the progress of a reaction at the ...
sciq
sciq_01_03691
The product of a system’s mass multiplied by its velocity is called what?
[ "horizontal momentum", "magnetic momentum", "variation momentum", "linear momentum" ]
D
8.1 Linear Momentum and Force Linear Momentum The scientific definition of linear momentum is consistent with most people’s intuitive understanding of momentum: a large, fastmoving object has greater momentum than a smaller, slower object. Linear momentum is defined as the product of a system’s mass multiplied by its v...
medmcqa
medmcqa_05_00554
Which one of the following is not a special incidence rate-
[ "Attack rate", "Secondary attack rate", "Hospital admission rate", "Standardized moality rate" ]
D
Ans. is 'd' i.e., Standardized moality rate Special incidence rates i) Attack rate (case rate) ii) Secondary attack rate iii) Hospital admission rate
ARC-Easy
arc_04_00933
According to Darwin's theory of evolution, the variations among finches that he observed in the Galapagos Islands resulted from
[ "transmission of acquired characteristics.", "use or disuse of their beaks.", "natural mutagens.", "natural selection." ]
D
null
ARC-Challenge
arc_04_02167
Which of the following is an observation about grasshoppers that a science class could have made on their nature walk?
[ "The grasshoppers will live longest in a container filled with plants.", "The grasshoppers are green with long back legs and antennae.", "The grasshoppers will probably eat more grass than tree leaves.", "The grasshoppers all hatched from eggs laid the year before." ]
B
null
medmcqa
medmcqa_05_01746
Fresh frozen plasma is used for: March 2011
[ "Deficiency of coagulation factor", "Deficiency of RBC", "Deficiency of proteins", "Deficiency of WBC" ]
A
Ans. A: Deficiency of Coagulation Factor Fresh frozen plasma is indicated for replacement of coagulation factor deficiency and in TTP Fresh frozen plasma: Indications generally are limited to the treatment of deficiencies of coagulation proteins for which specific factor concentrates are unavailable or undesirable. In ...
openbookqa
obqa_02_00650
What is an example of predators eating prey?
[ "a boa constrictor devouring a monkey", "a horse trampling a mouse", "a cat eating a piece of grass", "a whale eating tons of algae" ]
A
predators eat prey
medmcqa
medmcqa_05_04964
Ispilateral optic atrophy with contralateral papilloedema is a feature of -
[ "Fischer syndrome", "Foster kennedy syndrome", "Vogt- kayanagi- Harada syndrome", "WAGR syndrome" ]
B
Foster - Kennedy syndrome: - The frontal lobe, pituitary and middle ear tumor such as meningiomata of the oflactor groove are sometimes associated with Ipsilateral pressure atrophy of the optic nerve and contralateral papilloedema.
medmcqa
medmcqa_05_02765
The primary goal of Human Genome Project has been
[ "Introduction of a gene sequence into a cell to modify its behavior", "Identify genes and sequence of base pairs in dNA of human genome", "Development of new diagnostic techniques such as restriction enzymes", "Confirmation of Hardy Weinberg law" ]
B
Human Genome Project: HGP is an international scientific research project. Primary goals were to determine the sequence of chemical base pairs which make up dNA and to identify the approximately 25,000 genes of the human genome.
openbookqa
obqa_02_02851
Which of the following statements is true
[ "biofuel releases CO2 but is better than oil", "biofuel is without flaws", "biofuel can single-handedly end CO2 production", "biofuel is perfect for the environment" ]
A
biofuel releases carbon dioxide into the atmosphere
ARC-Challenge
arc_04_02204
During most of the year, the air over Boston, Massachusetts, contains a high amount of moisture. Which of the following best explains why there is a high amount of moisture in the air?
[ "Boston is close to an ocean.", "Boston is at a low elevation.", "Boston is near many mountains.", "Boston is far north of the equator." ]
A
null
sciq
sciq_01_07074
Steel, bronze, and brass are good examples of what?
[ "elements", "alloys", "metalloids", "salts" ]
B
Examples of alloys include steel, bronze, and brass.
sciq
sciq_01_07405
What are compounds composed of only two elements called?
[ "symbiotic compounds", "kinetic compounds", "digital compounds", "binary compounds" ]
D
Binary compounds are compounds composed of just two elements. The simplest kind of decomposition reaction is when a binary compound decomposes into its elements. Mercury(II) oxide, a red solid, decomposes when heated to produce mercury and oxygen gas.
sciq
sciq_01_08854
Oxygen is essentially just a waste product of the light reactions of what?
[ "electrolysis", "Fibrinolysis", "glycolysis", "photosynthesis" ]
D
You could argue that oxygen is one of the most important, if not THE most important molecule necessary for life. However, oxygen is essentially just a waste product of the light reactions of photosynthesis. It is a "leftover" from a necessary part of the process. All the oxygen that is necessary to maintain most forms ...
openbookqa
obqa_02_03670
A product that comes from the ground is likely
[ "Styrofoam containers", "an organic banana", "wax candles", "storm clouds" ]
B
nature is the source of natural resources
sciq
sciq_01_01837
Phototrophic organisms capture light energy from the sun and convert it into what type of energy inside their cells?
[ "chemical energy", "mechanical energy", "radiation energy", "solar power" ]
A
Phototrophic organisms capture light energy from the sun and convert it into chemical energy inside their cells.
sciq
sciq_01_00679
What kind of rays can travel thousands of meters through air and can penetrate and damage cells deep inside the body?
[ "gamma rays", "cosmic rays", "plasma rays", "x-rays" ]
A
Alpha particles can travel only a few centimeters through air. They can burn the skin but not penetrate it. Beta particles can travel up to a meter through air. They can penetrate and damage skin. Gamma rays can travel thousands of meters through air. They can penetrate and damage cells deep inside the body.
openbookqa
obqa_02_04399
What causes erosion?
[ "salads", "concrete", "gales", "cars" ]
C
wind causes erosion
sciq
sciq_01_09458
Population size influences the chances of a species surviving, with very small populations generally at greatest risk of what fate?
[ "extinction", "accumulation", "mutation", "adaptation" ]
A
Population size is the number of individuals in a population. For example, a population of insects might consist of 100 individual insects, or many more. Population size influences the chances of a species surviving or going extinct. Generally, very small populations are at greatest risk of extinction. However, the siz...
medmcqa
medmcqa_05_03701
Which of the following is sensory layer of retina?
[ "Rods & Cones", "Ganglion layer", "Amacrine cell layer", "Retinal pigment epithelium" ]
A
ANSWER: (A) Rods & ConesREF; Ganong's 22nd ed chapter 8The layer of rods and cones which are sensory receptors form the sensory layer of retina. The primary layers of the retina from outermost surface to innermost surface:* Pigment epithelium - supporting cells for the neural portion of the retina (photopigment regener...
openbookqa
obqa_02_03033
If a season switches from one to another in a place, the earth has
[ "exploded", "stayed in place", "moved more", "frozen" ]
C
the Earth revolving around the Sun causes the seasons to change on its axis
sciq
sciq_01_09148
Amino acids are made by which kind of plastid?
[ "neuroplasts", "glucoplasts", "leucoplasts", "sporozoans" ]
C
Leucoplasts are plastids that store substances such as starch or make small molecules such as amino acids.
openbookqa
obqa_02_01338
A fan pushes air with
[ "forks", "straw", "rotating flat surface", "lumber" ]
C
the vanes rotating in an electric fan causes air to move
sciq
sciq_01_06574
Programmed cell death is also known as?
[ "apoptosis", "sepsis", "necrosis", "suicide" ]
A
sciq
sciq_01_00694
What part of the body do ants use to detect chemicals?
[ "eyes", "antennae", "thorax", "fins" ]
B
Some animals communicate with scent. They release chemicals that other animals of their species can smell or detect in some other way. Ants release many different chemicals. Other ants detect the chemicals with their antennae. This explains how ants are able to work together. The different chemicals that ants produce h...
sciq
sciq_01_05904
Depending on a tumor’s location, for example, cancer surgeons may be unable to remove it. radiation and chemotherapy are difficult, and it is often impossible to target only the cancer cells. the treatments inevitably destroy this?
[ "host cells", "carcinogens", "fertility", "healthy cells" ]
D
Cancer treatments vary depending on the disease’s type and stage. Traditional approaches, including surgery, radiation, chemotherapy, and hormonal therapy, aim to remove or kill rapidly dividing cancer cells, but these strategies have their limitations. Depending on a tumor’s location, for example, cancer surgeons may ...
sciq
sciq_01_06246
Radon (rn) is a radioactive gas formed by the decay of naturally occurring uranium in rocks such as granite. it tends to collect in the basements of houses and poses a significant health risk if present in indoor air. many states now require that houses be tested for radon before they are what?
[ "sold", "modified", "seen", "built" ]
A
M = dRTP Exercise Radon (Rn) is a radioactive gas formed by the decay of naturally occurring uranium in rocks such as granite. It tends to collect in the basements of houses and poses a significant health risk if present in indoor air. Many states now require that houses be tested for radon before they are sold. Calcul...
medmcqa
medmcqa_05_04466
Test to diagnose thiamine deficiency -
[ "RBC transketolase", "FIGLU excretion", "Methyl-malunic acid in urine", "Histidine load test" ]
A
Ans. is 'a' i.e., RBC transketolase o Thiamine diphosphate is also the coenzume for transketolase, in the pentose phosphate pathway. Therefore, thiamine nutritional status is best assessed by erythrocyte (preferred) or whole blood transketolase activity.
medmcqa
medmcqa_05_03077
A coin is struck at 25 cm from incisor in the esophagus, this place coincides with -
[ "Cricopharyngeal junction", "Bronchus bifurfation", "Aortic arch", "Oesophago-gastric junction" ]
C
Ans-C Barium swallow may show a constriction at three site : QCricopharyngeal junction - Narrowest point (15 cm from incisor) QMiddle narrowing - crossing of the left main stem bronchus and aortic arch (25 cm from incisor). QLower most narrowing - At the hiatus of the diaphragm (40 cm from incisor)
sciq
sciq_01_00855
Hair sticks out from the epidermis, but it grows from the?
[ "fat", "humus", "bone", "dermis" ]
D
Hair is one of the defining characteristics of mammals. In fact, mammals are the only animals to have hair. Hair sticks out from the epidermis, but it grows from the dermis ( Figure below ). Hair grows from inside the hair follicle . New cells grow in the bottom part of the hair, called the bulb. Older cells get pushed...
ARC-Challenge
arc_04_02880
A small community is building their first water treatment plant, but has limited amounts of land and money available. One of the council members suggests reducing costs and land needs by leaving out the aeration pond. The plant supervisor explains that aeration is a necessary step in treating drinking water. What is th...
[ "Aeration kills anaerobic bacteria.", "Aeration removes dissolved gases.", "Aeration oxidizes dissolved metal ions.", "Aeration removes some solvents and chemicals." ]
A
null
openbookqa
obqa_02_04164
Which type of vegetation could you find in areas with low rainfall?
[ "sunflowers", "cacti", "rose bushes", "palm trees" ]
B
a desert environment has low rainfall
math_qa
mathqa_03_01489
a set s = { x , - 8 , - 5 , - 3 , 3 , 6 , 9 , y } with elements arranged in increasing order . if the median and the mean of the set are the same , what is the value of | x | - | y | ?
[ "2", "0", "- 1", "can not be determined" ]
A
"median of the set = ( - 3 + 3 ) / 2 = 0 as per statement , mean of the set = 0 mean of the set | y | - | x | + 18 - 16 = 0 ( where x is negative n y is positive ) | y | - | x | = - 2 so the absolute difference between two numbers is 2 answer a"
math_qa
mathqa_03_04670
neha ' s mother was 4 times her age 12 years ago . she will be twice as old as neha 12 years from now . what is the present age of neha ' s mother ?
[ "60 years", "33", "77", "66" ]
A
explanation : let neha ' s present age be ' x ' years . her age 12 years ago = ( x – 12 ) years therefore , her mother ' s age 12 years ago = 4 ( x – 12 ) her mother ' s present age = 4 x – 48 + 12 = 4 x – 36 neha ' s age after 12 years = x + 12 her mother ' s age after 12 years = 4 x – 36 + 12 = 4 x – 24 4 x – 24 = 2 ...
sciq
sciq_01_06798
When dissolved in water, the base sodium hydroxide (naoh) produces sodium ions with what charge?
[ "constant", "positive", "negative", "similar" ]
B
An acid also produces negative ions, and a base also produces positive ions. For example, the acid hydrogen chloride (HCl), when dissolved in water, produces negative chloride ions (Cl - ) as well as hydrogen ions. The base sodium hydroxide (NaOH) produces positive sodium ions (Na + ) in addition to hydroxide ions. The...
sciq
sciq_01_08581
Chemical reactions that consume energy are called what?
[ "inefficient reactions", "exothermic reactions", "endothermic reactions", "greedy reactions" ]
C
Chemical reactions that consume energy are called endothermic reactions . Energy is usually absorbed from the surroundings as heat. An example is the synthesis of ammonia, described above. In organisms, endothermic reactions are called anabolic reactions . Anabolic reactions construct molecules from smaller units. An e...
ARC-Easy
arc_04_00470
Which of the following best explains why the tectonic plates of Earth move?
[ "conduction from solar heating", "heat convection from the mantle", "global winds", "ocean currents" ]
B
null
ARC-Challenge
arc_04_02719
Tigers and household cats are members of the same family; however, their sizes are vastly different. What is the cause of this difference?
[ "biochemical makeup", "behavioral makeup", "genetics", "habitat size" ]
C
null
medmcqa
medmcqa_05_03107
Packed red cells are stored in:
[ "SAG-M solution", "PCR-F solution", "MED-R solution", "DAM-P solution" ]
A
Packed cells are stored in a SAG-M solution (saline–adenine–glucose–mannitol) to increase their shelf-life to 5 weeks at 2–6 deg C. (Older storage regimens included storage in CPD – citrate–phosphate–dextrose solutions – giving cells a shelf-life of 2–3 weeks).
ARC-Easy
arc_04_00506
Cumulonimbus clouds often form along cold fronts. Which type of weather is most likely to occur along a cold front?
[ "moderate temperature with mild breezes", "storms with hurricane winds", "rain with possible severe thunderstorms", "high temperatures with low winds" ]
C
null
math_qa
mathqa_03_03559
how many multiples of 2 are there between 1 and 54 , exclusive ?
[ "21", "22", "24", "26" ]
D
"26 multiples of 2 between 1 and 54 exclusive . from 2 * 1 upto 2 * 26 , ( 1,2 , 3,4 , . . . , 26 ) . hence , 26 multiples ! correct option is d"
math_qa
mathqa_03_02670
in the rectangular coordinate system , what is the x - intercept of a line passing through ( 10 , 3 ) and ( − 6 , − 5 ) ?
[ "4", "2", "0", "− 2" ]
A
first , solve for the slope , m : m = ( y 2 - y 1 ) / ( x 2 - x 1 ) = ( - 5 - 3 ) / ( - 6 - 10 ) = - 8 / - 16 or 1 / 2 then you can re - write the equation as y = ( 1 / 2 ) x + b and plug in one of the points to find b , the y intercept . using point ( 10 , 3 ) : 3 = ( 1 / 2 ) ( 10 ) + b , which can be simplified to 3 ...
medmcqa
medmcqa_05_00426
Dose of fosfomycin in a 40 years patient who is weighing 60 kg:-
[ "6 g single dose", "6 mg/kg single dose", "3 g single dose", "3 mg/kg single dose" ]
C
Fosfomycin is used for uncomplicated cystitis. The single dose of 3g is given. It is given for wide spectrum including Staphylococcus aureus, VRE, Gram negative bacteria including Pseudomonas and ESBL producing strains.
ARC-Easy
arc_04_01124
Which of these groups animals are ALL mammals?
[ "duck, eagle, parrot", "mouse, monkey, bat", "butterfly, ant, mosquito", "crocodile, snake, turtle" ]
B
null
sciq
sciq_01_03458
Dense connective tissue contains more collagen fibers than does loose connective tissue. as a consequence, it displays greater resistance to what?
[ "stretching", "stiffening", "freezing", "contracting" ]
A
Dense Connective Tissue Dense connective tissue contains more collagen fibers than does loose connective tissue. As a consequence, it displays greater resistance to stretching. There are two major categories of dense connective tissue: regular and irregular. Dense regular connective tissue fibers are parallel to each o...
sciq
sciq_01_01160
A light bulb converts electrical energy to light and what?
[ "visible energy", "thermal energy", "kinetic energy", "chemical energy" ]
B
Most circuits have devices such as light bulbs that convert electrical energy to other forms of energy. In the case of a light bulb, electrical energy is converted to light and thermal energy.
openbookqa
obqa_02_04435
What have a negative impact on the environment?
[ "plants", "recycling plants", "dumpyards", "oceans" ]
C
landfills have a negative impact on the environment
medmcqa
medmcqa_05_04705
Tracheal bifurcation is at which level of vertebra
[ "T4", "T2", "T1", "T7" ]
A
Trachea divides at the level of lower border of 4th thoracic vertebrae into 2 primary principal bronchus.
ARC-Easy
arc_04_01316
Which is a chemical compound?
[ "aluminum", "carbonated water", "sodium chloride", "carbon-14" ]
C
null
openbookqa
obqa_02_00014
In the desert, a hawk may enjoy an occasional
[ "coyote", "reptile", "bat", "scorpion" ]
B
hawks eat lizards
sciq
sciq_01_09876
How many types of antigens can an antibody match?
[ "one", "infinite", "two", "four" ]
A
An antibody matches only one type of antigen.
sciq
sciq_01_08930
What is defined as a loss of hydrogen atoms?
[ "Reduction", "conduction", "evaporation", "oxidation" ]
D
Oxidation is also defined as a loss of hydrogen atoms. In the following equation, ethanol is oxidized to acetaldehyde by the loss of two hydrogen atoms:.
math_qa
mathqa_03_04956
one hour after yolanda started walking from x to y , a distance of 80 miles , bob started walking along the same road from y to x . if yolanda â s walking rate was 8 miles per hour and bob â s was 9 miles per hour , how many miles had bob walked when they met ?
[ "38.07", "40", "42", "39" ]
A
"let t be the number of hours that bob had walked when he met yolanda . then , when they met , bob had walked 4 t miles and yolanda had walked 8 ( t + 1 ) miles . these distances must sum to 80 miles , so 9 t + 8 ( t + 1 ) = 80 , which may be solved for t as follows 9 t + 8 ( t + 1 ) = 80 9 t + 8 t + 8 = 80 17 t = 72 t...
medmcqa
medmcqa_05_02591
Alkaline diuresis is treatment of choice in poisoning with ?
[ "Benzodiazepine", "Barbiturates", "Dhatura", "Morphine" ]
B
Ans. is 'b' i.e., Barbiturate poisoning Elimination of poison from circulation can be by following methods :? A) Forced diuresis with or without alteration of urinary pH Diuresis and ion trapping alteration of urinary pH may prevent the renal reabsorption of poisons that under go excretion by glomerular filteration and...
ARC-Easy
arc_04_00820
When a guitar string is plucked, sound is produced by
[ "the size of the guitar.", "the metal on the guitar.", "the wood on the guitar.", "the vibrations of the string." ]
D
null
sciq
sciq_01_03749
What do you call the splitting of the nucleus of an atom into two smaller nuclei?
[ "nuclear fission", "critical fission", "nuclear fusion", "cell division" ]
A
Nuclear fission is the splitting of the nucleus of an atom into two smaller nuclei. This type of reaction releases a great deal of energy from a very small amount of matter. For example, nuclear fission of a tiny pellet of uranium-235, like the one pictured in Figure below , can release as much energy as burning 1,000 ...
ARC-Challenge
arc_04_02240
Which mixture contains ingredients that can be easily separated?
[ "bread", "fruit salad", "ocean water", "soda water" ]
B
null
math_qa
mathqa_03_04696
how many 7 in between 1 to 130 ?
[ "18", "20", "22", "23" ]
D
"7 , 17,27 , 37,47 , 57,67 , 70,71 , 72,73 , 74,75 , 76,77 ( two 7 ' s ) , 78 , 79,87 , 97,107 , 117,127 23 7 ' s between 1 to 130 answer : d"
ARC-Easy
arc_04_01964
A company plants trees on a bare hillside. Which of these is the BEST reason for planting the trees?
[ "The trees provide oxygen for the soil.", "The trees prevent soil from washing away.", "The trees make shade for animals living there.", "The trees cause animals to move to other places." ]
B
null
medmcqa
medmcqa_05_02317
Drinking can be induced by
[ "Electrical stimulation of the posterior hypothalamus", "Osmotic stimulation of supraoptic nucleus", "Lesions in the paraventricular nucleus", "Neuronal lesion of the preoptic nucleus" ]
B
(B) Osmotic stimulation of supraoptic nucleus
sciq
sciq_01_00310
Tests for levels of what in blood allow a diabetic patient to regulate how much insulin to administer?
[ "chloride", "alcohol", "protein", "glucose" ]
D
Laboratory testing has come to the local drug store or grocery store because of developments in chemistry. You can test your blood glucose using a simple portable device that runs a chemical test on the blood sample and tells you how much glucose is present, allowing a diabetic patient to regulate how much insulin to a...
openbookqa
obqa_02_02020
An industry that create a lot of waste is:
[ "Solar Power Companies", "Recycling companies", "water production companies", "Cleaning Companies" ]
D
processes sometimes produce waste products
medmcqa
medmcqa_05_01817
Which is not a derivative of cannabis?
[ "Heroin", "Charas", "Ganza", "Bhang" ]
A
Ans. (a) HeroinRef.: Parikh 6th ed. 10.54
sciq
sciq_01_10577
What theory of gases describes this state of matter as composed of tiny particles in constant motion with a lot of distance between the particles?
[ "magnetic", "thermal", "kinetic", "optical" ]
C
The kinetic theory of gases describes this state of matter as composed of tiny particles in constant motion with a lot of distance between the particles. This model of gases explains some of the physical properties of gases. Because most of a gas is empty space, a gas has a low density and can expand or contract under ...
openbookqa
obqa_02_02068
Long decayed plant life would most likely fuel our
[ "nuclear power plants", "dogs", "motorcycles", "bodies" ]
C
forming fossil fuels requires decaying vegetation
medmcqa
medmcqa_05_00063
A 24yr old with married life of 4 years visits infeility clinic with his recurrent aboion On fuher workup she found to be having septate uterus which surgery has better reproductive outcome
[ "stranssmann metroplasty", "Jones metroplasty", "Tompkins metroplasty", "Trans cervical Hysteroscopic resection of septum" ]
C
ref : shaw gynecology
medmcqa
medmcqa_05_04533
HIV virus was discovered in?
[ "1976", "1983", "1996", "1988" ]
B
Ans. (b) 1983 History of HIV In 1981 AIDS was first recognized when US centre for disease control and prevention repoed the unexplain occurrences of P. jiroveci infection in five previously health homosexual male. They appear to have lost their immunocompetence. So the condition was given the name "Acquired immune defi...
math_qa
mathqa_03_00928
in an election between two candidates , one got 55 % of the total valid votes , 20 % of the votes were invalid . if the total number of votes was 5500 , the number of valid votes that the other candidate got , was :
[ "2800", "1980", "2900", "2200" ]
B
"b number of valid votes = 80 % of 5500 = 4400 . valid votes polled by other candidate = 45 % of 4400 = ( 45 / 100 x 4400 ) = 1980 ."
ARC-Challenge
arc_04_02344
In order to produce light, the atoms inside a light bulb transform electrical energy into
[ "kinetic energy.", "electromagnetic radiation.", "chemical energy.", "heat energy." ]
B
null
ARC-Easy
arc_04_01571
A class planted trees and shrubs in an empty dirt lot beside the school. The roots of the plants can help protect the soil. The soil is most likely being protected from what?
[ "a drought", "wind erosion", "an earthquake", "water pollution" ]
B
null
sciq
sciq_01_03272
What type of hydrocarbons contain at least one double or triple bond between carbon atoms?
[ "saturated", "ionic", "unsaturated", "catalytic" ]
C
Unsaturated hydrocarbons contain at least one double or triple bond between carbon atoms. As a result, the carbon atoms are unable to bond with as many hydrogen atoms as they would if they were joined only by single bonds. This makes them unsaturated with hydrogen. Unsaturated hydrocarbons are classified on the basis o...
medmcqa
medmcqa_05_00232
Most of the detoxification reactions are mainly carried out in:
[ "Liver", "Brain", "Kidney", "Spleen" ]
A
Most of the detoxification reactions are mainly carried out in liver, as cytochrome P450 is found in liver in the highest concentration.
sciq
sciq_01_11375
Cilia and flagella are generally associated with what function in organisms, whether the function is internal or external?
[ "digestion", "reproduction", "sight", "movement" ]
D
Cilia ( cilium , singular) are made up of microtubule containing extensions of the cell membrane. Although both cilia and flagella are used for movement, cilia are much shorter than flagella. Cilia cover the surface of some single-celled organisms, such as paramecium. Their cilia beat together to move the little animal...
math_qa
mathqa_03_01384
fresh grapes contain 80 % by weight while dried grapes contain 20 % water by weight . what is the weight of dry grapes available from 40 kg of fresh grapes ?
[ "10 kg", "12 kg", "15 kg", "16 kg" ]
A
"from the question we know : 40 kg * 80 % = 32 kg of water in the fresh grapes 40 kg - 32 kg of water = 8 kg of non - water mass we are looking for the weight of the dry grapes ( x ) . since the question tells us that 20 % of the weight of the dry graps is water and we know that 8 kg is non - water mass we can set up t...
sciq
sciq_01_00933
Models may be physical, conceptual, or what else?
[ "fundamental", "mathematical", "theoretical", "experimental" ]
B
Models may be physical, conceptual, or mathematical.
sciq
sciq_01_09076
Scientists search for answers to questions and solutions to problems by using a procedure called this?
[ "scientific method", "measured method", "continued method", "careful method" ]
A
Scientists search for answers to questions and solutions to problems by using a procedure called the scientific method. This procedure consists of makingobservations, formulating hypotheses, and designing experiments, which in turn lead to additional observations, hypotheses, and experiments in repeated cycles (Figure ...
sciq
sciq_01_10470
What is the name of the organelle that helps make and transport proteins and lipids?
[ "nucleus", "endoplasmic reticulum", "mitochondria", "plasma membrane" ]
B
The endoplasmic reticulum (ER) is an organelle that helps make and transport proteins and lipids. It’s made of folded membranes. Bits of membrane can pinch off to form tiny sacs called vesicles. The vesicles carry proteins or lipids away from the ER.
sciq
sciq_01_00305
A nerve cell that carries messages is called a?
[ "neuron", "stem cell", "platelet", "mitochondria" ]
A
The nervous system is made up of nerves. A nerve is a bundle of nerve cells. A nerve cell that carries messages is called a neuron. The messages carried by neurons are called nerve impulses.
ARC-Easy
arc_04_00768
Which class of elements best conducts electricity?
[ "metals", "nonmetals", "semimetals", "noble (inert) gases" ]
A
null
openbookqa
obqa_02_00089
Which doesn't contain water?
[ "Sea of Tranquilitiy", "Caspian Sea", "Dead Sea", "Caribbean Sea" ]
A
the moon does not contain water
openbookqa
obqa_02_03429
Friction increases as what increases on a surface?
[ "smooth", "shiny", "rutted", "clean" ]
C
as roughness of a surface increases , friction will increase
ARC-Easy
arc_04_00139
Which of these can be described as a system of stars, gases, dust, and other matter that orbits a common center of gravity?
[ "an asteroid", "a galaxy", "a nebula", "a comet" ]
B
null
sciq
sciq_01_03316
What is name of the phenomenon where similar traits evolve independently in species that do not share a common ancestry?
[ "divergent evolution", "equation evolution", "coalescence evolution", "convergent evolution" ]
D
Figure 22.31 The force on a current-carrying wire in a magnetic field is.
openbookqa
obqa_02_02429
A person can know if they need a down vest by checking the
[ "thermograph", "tunnels", "graveyard shift", "sidewalk" ]
A
a thermometer is used to measure temperature
math_qa
mathqa_03_01165
if a is a positive integer , and if the units digit of a ^ 2 is 9 and the units digit of ( a + 1 ) ^ 2 is 4 , what is the units d digit of ( a + 2 ) ^ 2 ?
[ "1", "3", "5", "6" ]
A
"i also got a . by punching in numers : d . . . 7 ^ 2 = . . . 9 . . . 8 ^ 2 = . . . 4 . . . 9 ^ 2 = . . . 1 . a"
openbookqa
obqa_02_02302
A solution could be
[ "pebbles and soil", "peas and corn", "juice and vodka", "toothpaste and bristles" ]
C
a solution is made of one substance dissolved in another substance
math_qa
mathqa_03_01634
if the length of the sides of two cubes are in the ratio 4 : 1 , what is the ratio of their total surface area ?
[ "4 : 1'", "6 : 1'", "8 : 1'", "16 : 1'" ]
D
let x be the length of the small cube ' s side . the total surface area of the small cube is 6 x ^ 2 . the total surface area of the large cube is 6 ( 4 x ) ^ 2 = 96 x ^ 2 . the ratio of surface areas is 16 : 1 . the answer is d .
openbookqa
obqa_02_04518
A cardinal makes brief contact with a picnic table, and between them there is
[ "death", "transactions", "animosity", "abrasion" ]
D
friction occurs when two object 's surfaces move against each other
openbookqa
obqa_02_00876
Why is acid rain unhealthy?
[ "because it causes drought", "because it evaporates too quickly", "It contains various detrimental particles from the air", "because it causes algae growth" ]
C
acid rain has a negative impact on water quality
sciq
sciq_01_07778
In science, coefficients are used to balance what kind of equations?
[ "chemical", "liquid", "mineral", "isolated" ]
A
Equations in chemistry must balance. There must be the same number of each type of atom in the products as there is in the reactants. Coefficients are used to balance chemical equations. They show how many atoms or molecules of a substance are involved in a reaction.
medmcqa
medmcqa_05_04044
The oculomotor nerve passes between which pair artery?
[ "A Superior cerebellar artery and posterior cerebral artery", "Posterior inferior cerebellar artery and anterior-cerebellar artery", "Posterior cerebellar artery and middle cerebral Artery", "Posterior cerebral communicating artery" ]
A
The oculomotor nerve emerges from the midbrain and passes between the two cerebral peduncles. The nerve then passes between the superior cerebellar artery and the posterior cerebral artery before entering the dura of the lateral wall of the cavernous sinus Because of the close relationship between the oculomotor nerve ...
medmcqa
medmcqa_05_00115
If annual growth rate of population is 1.2%, the population is likely to get doubled in:
[ "18--20 years", "20--23years", "28--35 years", "47 -- 50 years" ]
D
Rate Annual GR % Yrs required Stationary No growth - Slow growth 0.5 >139 Moderate growth 0.5-1 139-70 Rapid growth 1-1.5 70-47 Very rapid growth 1.5-2 47-35 Explosive growth 2-2.5 35-28 Explosive growth 3-3.5 23-20 Explosive growth 3.5-4 20-18
sciq
sciq_01_03048
Varves form in lakes covered by what?
[ "coral reef", "bridges", "soot", "ice" ]
D
Varves form in lakes covered by ice. Varves are useful to scientists for understanding climate.
sciq
sciq_01_00551
What is the transfer of heat by a current?
[ "combustion", "convection", "radiation", "diffusion" ]
B
Convection is the transfer of heat by a current. Convection happens in a liquid or a gas. Air near the ground is warmed by heat radiating from Earth's surface. The warm air is less dense, so it rises. As it rises, it cools. The cool air is dense, so it sinks to the surface. This creates a convection current, like the o...
sciq
sciq_01_01413
What type of forces are involved when deposited rock forms deltas or barrier islands?
[ "constructive forces", "matter forces", "gravity forces", "accumulation forces" ]
A
Rivers and streams flow across continents. They cut away at rock, forming river valleys ( Figure below ). These are destructive forces. The bits and pieces of rock carried by rivers are deposited where rivers meet the oceans. These can form deltas, like the Mississippi River delta. They can also form barrier islands, l...
medmcqa
medmcqa_05_00648
Assay for lipid peroxidation is:
[ "MTT Assay", "FOX assay", "Ame's test", "Guthrie's test" ]
B
Free radical measurement can be done by : FOX assay - (Ferrous oxidation in Xylenol) Estimation of Dialdehydes (e.g. MDA- Malon dialdehyde) Pentane and methane measurement in exhaled air
openbookqa
obqa_02_04303
Screws and bolts are needed to do what with a bike?
[ "eat it", "cry", "nothing", "construct it" ]
D
a bicycle contains screws
sciq
sciq_01_06521
Spindle fibers pull what apart in anaphase i?
[ "risk chromosomes", "True Chromosomes", "linked chromosomes", "known chromosomes" ]
C
In anaphase I, the spindle fibers pull the linked chromosomes apart. The sister chromatids remain tightly bound together at the centromere. It is the chiasma connections that are broken in anaphase I as the fibers attached to the fused kinetochores pull the homologous chromosomes apart (Figure 7.5). In telophase I, the...