dataset
stringclasses
6 values
id
stringlengths
12
16
question
stringlengths
1
935
choices
listlengths
4
4
answer
stringclasses
4 values
support
stringlengths
0
7.76k
openbookqa
obqa_02_03892
Poison causes harm to
[ "car engines", "televisions", "wombats", "corpses" ]
C
poison causes harm to living things
math_qa
mathqa_03_02351
he total marks obtained by a student in physics , chemistry and mathematics is 140 more than the marks obtained by him in physics . what is the average mark obtained by him in chemistry and mathematics ?
[ "55", "70", "75", "85" ]
B
"let the marks obtained by the student in physics , chemistry and mathematics be p , c and m respectively . p + c + m = 140 + p c + m = 140 average mark obtained by the student in chemistry and mathematics = ( c + m ) / 2 = 140 / 2 = 70 . answer : b"
math_qa
mathqa_03_01591
how many terminating zeroes t does 200 ! have ?
[ "40", "48", "49", "55" ]
C
you have 40 multiples of 5 , 8 of 25 and 1 of 125 . this will give 49 zeros . c
openbookqa
obqa_02_03378
if the particles in an electric rig were immobile, what would result from that?
[ "there will be a shock current", "the circuit will fail to power", "there would be a short circuit", "there would be current overload" ]
B
electricity is made of moving charged particles
sciq
sciq_01_05472
Blood from what organs enters the left atrium of the heart?
[ "Lymph nodes", "Brain", "intestines", "lungs" ]
D
Blood from the lungs enters the left atrium of the heart. The left atrium pumps the blood to the left ventricle, which pumps it to the body.
sciq
sciq_01_04676
What system is the spinal cord related to?
[ "lymphatic system", "digestive system", "nervous system", "circulatory system" ]
C
Some people recover from spinal cord injuries. But many people are paralyzed for life. Thanks to the work of Christopher Reeve ( Figure below ), more research is being done on spinal cord injuries now than ever before. For example, scientists are trying to discover ways to regrow damaged spinal cord neurons.
ARC-Challenge
arc_04_03199
Cindy learned that trees release gases into to the air during photosynthesis. What gas does a tree release?
[ "carbon dioxide", "hydrogen", "nitrogen", "oxygen" ]
D
null
sciq
sciq_01_10963
Plant cells have cell walls that are made of what?
[ "tissue", "carbonate", "nucleus", "cellulose" ]
D
Plants are multicellular eukaryotes that are placed in the Plant Kingdom . Plant cells have cell walls that are made of cellulose. Plant cells also have chloroplasts. They allow plants to make food by photosynthesis. In addition, plants have specialized reproductive organs that produce gametes. Male reproductive organs...
math_qa
mathqa_03_00875
5 ^ 100 is divided by 18 . then what is the remainder ?
[ "10", "11", "13", "15" ]
C
"here n = 18 = 2 × 32 ϕ ( 18 ) = 18 ( 1 − 12 ) ( 1 − 13 ) = 6 so 56 when divided by 18 , remainder is 1 . so we can write the given expression 5100 = ( 56 ) 16 × 54 = ( 1 ) 16 × 54 = 52 × 52 = 7 × 7 = 49 now 49 when divided by 18 , remainder is 13 . c"
openbookqa
obqa_02_02427
The crawling pace of limestone removal from an area produces
[ "giant slugs", "new crops", "homes for bats", "land mines" ]
C
a cavern is formed by carbonic acid in groundwater seeping through rock and dissolving limestone
sciq
sciq_01_00138
What is the boiling and freezing point of water in celcius?
[ "212 degrees c and 0 degrees c", "212 degrees c and 32 degrees c", "100 degrees c and 0 degrees c", "100 degrees c and 32 degrees c" ]
C
Melting and boiling points are somewhat unique identifiers, especially of compounds. In addition to giving some idea as to the identity of the compound, important information can be obtained about the purity of the material.
medmcqa
medmcqa_05_03150
A patient has been diagnosed as having "long QT syndrome." The patient is experiencing significant pain following a bout with shingles. What would be an appropriate drug for his pain?
[ "Amitriptyline", "Fentanyl", "Acyclovir", "Gabapentin" ]
D
It's a case of post-herpetic neuralgia. Gabapentin is the drug of choice. Amitriptyline can also be used for pain but it can also cause arrhythmia.
sciq
sciq_01_10710
What type of science is the application of science to answer questions related to the law?
[ "biologic", "forensic", "physics", "ecology" ]
B
Forensic Scientist Forensic science is the application of science to answer questions related to the law. Biologists as well as chemists and biochemists can be forensic scientists. Forensic scientists provide scientific evidence for use in courts, and their job involves examining trace material associated with crimes. ...
ARC-Challenge
arc_04_02502
Which of the following distinguishes the organisms in the kingdom Fungi from other eukaryotic organisms?
[ "Fungi are unicellular.", "Fungi reproduce sexually.", "Fungi obtain nutrients by absorption.", "Fungi make food through photosynthesis." ]
C
null
sciq
sciq_01_01636
What is necessary for new alleles to be created?
[ "new rna", "cross-pollination", "new frequencies", "new mutations" ]
D
No new mutations are occurring. Therefore, no new alleles are being created.
sciq
sciq_01_11313
What effect, related to weather forecasting, occurs not only for sound but for any wave when there is relative motion between the observer and the source?
[ "doppler", "precipitation", "pulse", "echo" ]
A
Mole-mole calculations are not the only type of calculations that can be performed using balanced chemical equations. Recall that the molar mass can be determined from a chemical formula and used as a conversion factor. We can add that conversion factor as another step in a calculation to make a molemass calculation, w...
sciq
sciq_01_00999
What is the first digestive organ that food enters?
[ "mouth", "stomach", "esophagus", "tongue" ]
A
The mouth is the first digestive organ that food enters. The sight, smell, or taste of food stimulates the release of saliva and digestive enzymes by salivary glands inside the mouth. Saliva wets the food, which makes it easier to break up and swallow. The enzyme amylase in saliva begins the chemical digestion of starc...
sciq
sciq_01_06248
Force times distance is the equation for what?
[ "power", "work", "speed", "gravity" ]
B
Work is directly related to both the force applied to an object and the distance the object moves. It can be represented by the equation: Work = Force × Distance.
sciq
sciq_01_11236
The purpose of scientific investigations generally is to test a what?
[ "theory", "question", "suggestion", "hypothesis" ]
D
Although this cartoon pokes fun at scientific hypotheses, the concept of hypothesis is one of the most important in science. Scientific investigations discover evidence that helps science advance, and the purpose of scientific investigations generally is to test hypotheses. Finding evidence to support or disprove hypot...
sciq
sciq_01_05982
What is the term for a state of matter that yields to sideways or shearing forces?
[ "plasma", "gravity", "solid", "fluid" ]
D
Section Summary 11.1 What Is a Fluid? • A fluid is a state of matter that yields to sideways or shearing forces. Liquids and gases are both fluids. Fluid statics is the physics of stationary fluids.
ARC-Challenge
arc_04_02150
Photosynthesis is a process involving carbon dioxide, water, glucose, oxygen, and sunlight. Which is the correct chemical equation for photosynthesis?
[ "O_{2} + H_{2}O + energy -> C_{6}H_{12}O_{6} + CO_{2}", "CO_{2} + H_{2}O -> C_{6}H_{6}O_{3} + O_{2} + energy", "6O_{2} + 6H_{2}O -> C_{6}H_{12}O_{6} + 6CO_{2} + energy", "6CO_{2} + 6H_{2}O + energy -> C_{6}H_{12}O_{6} + 6O_{2}" ]
D
null
medmcqa
medmcqa_05_02676
The microarray is used to
[ "Study multiple genes", "Study disease", "Study organism", "Study blood group" ]
A
Microarray - A type of hybridization technique which utilizes multiple oligonucleotide probes to study multiple genes within a sho period of time.(Ref: Robbins 8/e p174)
ARC-Easy
arc_04_01627
Which layer of the atmosphere contains the greatest amount of water vapor?
[ "thermosphere", "mesosphere", "stratosphere", "troposphere" ]
D
null
openbookqa
obqa_02_03502
Plants are called producers because they may produce their own
[ "time travel", "feelings", "vortex", "sustenance" ]
D
In the food chain process a green plant has the role of producer
ARC-Easy
arc_04_01455
Frogs and salamanders compete with each other for insects. Both frogs and salamanders catch flying insects with their tongues. Which feature would most likely help both animals compete for flying insects?
[ "sticky tongues", "bright tongues", "thick tongues", "short tongues" ]
A
null
ARC-Challenge
arc_04_03097
The drag of wind results in which feature of ocean surface currents?
[ "movement of water away from the equator", "cyclical variations in the height of high tides", "reduction in velocity with distance from Earth's poles", "deflection of water toward the direction of airflow" ]
D
null
medmcqa
medmcqa_05_02374
Most common site of metastases in case of osteosarcoma is
[ "Brain", "Lungs", "Liver", "Bladder" ]
B
Ans. is 'b' i.e., Lungs * Almost 10% of the patient have metastases at presentation. Metastases is most common to lungs, but hematogenous spread to other organs is also possible - including lymph nodes, brain and skeleton.
medmcqa
medmcqa_05_02196
Inspiratory stridor is obstructive lesions of:
[ "Trachea", "Bronchus", "Subglottis", "Supraglottis" ]
D
STRIDOR 1. Inspiratory stridor - obstructive lesion of supraglottis of pharynx. 2. Expiratory stridor - lesion of thoracic trachea, primary and secondary bronchi 3. Biphasic stridor - lesion of glottis sub glottis and cervical trachea
openbookqa
obqa_02_01560
If a plant is going to photosynthesize, it can have all aside from
[ "water", "sunlight", "cake", "soil" ]
C
a plant requires sunlight for photosynthesis
sciq
sciq_01_10251
Where does the small intestine begin?
[ "stomach", "mouth", "colon", "spleen" ]
A
The small intestine a is narrow tube that starts at the stomach and ends at the large intestine ( Figure above ). In adults, the small intestine is about 23 feet long. Chemical digestion takes place in the first part of the small intestine. Many enzymes and other chemicals are secreted here. The small intestine is also...
sciq
sciq_01_05224
Which nerve carries electrical signals from the rods and cones to the brain?
[ "optic", "axon", "auditory", "neurotransmitter" ]
A
The optic nerve carries electrical signals from the rods and cones to the brain.
sciq
sciq_01_09825
Dentists occasionally use metallic mixtures called amalgams for what?
[ "anesthesia", "braces", "fillings", "tools" ]
C
Dentists occasionally use metallic mixtures called amalgams for fillings. If an amalgam contains zinc, however, water can contaminate the amalgam as it is being manipulated, producing hydrogen gas under basic conditions. As the filling hardens, the gas can be released, causing pain and cracking the tooth. Write a balan...
openbookqa
obqa_02_04947
A skunk produces a bad what?
[ "heat", "smeller perception", "cold", "color" ]
B
a skunk produces a bad odor
math_qa
mathqa_03_02278
a student has to obtain 33 % of the total marks to pass . he got 59 marks and failed by 40 marks . the maximum marks are ?
[ "450", "300", "500", "610" ]
B
"let the maximum marks be x then , 33 % of x = 59 + 40 33 x / 100 = 99 x = 300 answer is b"
openbookqa
obqa_02_04385
A living thing requires what to grow?
[ "support", "nutriment", "toys", "plastic" ]
B
a living thing requires nutrients to grow
openbookqa
obqa_02_03548
moist means high in what?
[ "wetness", "warmth", "depth", "temperature" ]
A
moist means high in moisture
sciq
sciq_01_09311
What is created when the wave source moves faster than the wave propagation speed?
[ "superceding wake", "loop wake", "piece wake", "bow wake" ]
D
Sonic booms are one example of a broader phenomenon called bow wakes. A bow wake, such as the one in Figure 17.19, is created when the wave source moves faster than the wave propagation speed. Water waves spread out in circles from the point where created, and the bow wake is the familiar V-shaped wake trailing the sou...
math_qa
mathqa_03_02505
find the number of elements in the power set of { 1,2 }
[ "4", "0", "2", "3" ]
A
"power set is the set of subsets of { 1,2 } that is { { 1,2 } , { 1 } , { 2 } , f } answer : a"
ARC-Easy
arc_04_01199
Which weather instrument measures air pressure?
[ "thermometer", "anemometer", "rain gauge", "barometer" ]
D
null
openbookqa
obqa_02_04649
A koala's home can be destroyed because of
[ "affection", "magic", "my heart", "exploding hot liquid" ]
D
if a habitat is destroyed then that habitat can not support animals
sciq
sciq_01_00546
What is the energy of motion called?
[ "kinetic energy", "mixed energy", "potential energy", "binary energy" ]
A
sciq
sciq_01_02645
What do you call the part of the skeletal system that connects bones?
[ "joints", "fibers", "tissue", "muscles" ]
A
Running. A means of terrestrial locomotion allowing humans and other animals to move rapidly on foot. The knees, which connect one part of the leg to the other, have to allow the legs to move. The knee is a joint, the part of the skeletal system that connects bones.
sciq
sciq_01_01607
What is the medical process of removing wastes and excess water from the blood by diffusion and ultrafiltration called?
[ "dialysis", "tumors", "arthritis", "digestion" ]
A
Dialysis Technician Dialysis is a medical process of removing wastes and excess water from the blood by diffusion and ultrafiltration. When kidney function fails, dialysis must be done to artificially rid the body of wastes. This is a vital process to keep patients alive. In some cases, the patients undergo artificial ...
sciq
sciq_01_04822
Food is broken into smaller particles by mastication, a process involving action by what structures?
[ "tonsils", "cilia", "proteins", "teeth" ]
D
Oral Cavity Both physical and chemical digestion begin in the mouth or oral cavity, which is the point of entry of food into the digestive system. The food is broken into smaller particles by mastication, the chewing action of the teeth. All mammals have teeth and can chew their food to begin the process of physically ...
medmcqa
medmcqa_05_02198
Which of the following is the best-known metabolic function of the lung:
[ "Inactivation of serotonin", "Conversion of angiotensin-I to angiotensin-II", "Inactivation of bradykinin", "Metabolism of basic drugs by cytochrome P450 system" ]
B
B i.e. Conversion of angiotensin - Ito angiotension II.
openbookqa
obqa_02_01457
A person is in the forest, lost. They need to signal to others that they are there, and their voice is gone, so they need to do it inaudibly. The person may signal with
[ "fire", "rain", "leaves", "ducks" ]
A
fire gives off light
math_qa
mathqa_03_03777
a car traveling at a certain constant speed takes 2 seconds longer to travel 1 kilometer than it would take to travel 1 kilometer at 450 kilometers per hour . at what speed , in kilometers per hour , is the car traveling ?
[ "370", "365", "360", "380" ]
C
"c 450 * t = 1 km = > t = 1 / 450 km / h v * ( t + 2 / 3600 ) = 1 v ( 1 / 450 + 2 / 3600 ) = 1 = > v = 360 km / h"
openbookqa
obqa_02_00541
wildfire occurs when
[ "being environmental is considered hot", "someone smokes near a forest", "condensed tree areas are ablaze", "tree patterns are similar to fire" ]
C
wildfire is when a forest catches fire
medmcqa
medmcqa_05_01588
The antibody which is associated with decreased risk for nephritis in SLE is:
[ "Anti-RNP", "Anti-Sm", "Anti-Ro", "Antihistone" ]
C
Anti-Ro, and anti La antibodies are associated with low risk for nephritis in SLE.Anti-RNP is not specific for SLE, its high titres are associated with overlap syndromes.Antihistone antibodies are associated with drug induced SLE.Anti-Sm is specific for SLE but it has no definite clinical correlations.Anti-dsDNA Antibo...
medmcqa
medmcqa_05_02358
ABC transpoer ?
[ "P. glycoprotein", "Membrane sparing", "Channel", "Adenylyl cyclase" ]
A
Ans. is'a' i.e., P. glycoproteinATP-binding cassette transpoers (ABCtranspoers) are integral transmembrane proteins that utilize ATP as an energy source to translocate a variety of substrates across membranes.P-glycoprotein is an ATP-binding cassette (ABC) transpoer and is an impoant factor to limit membrane permeabili...
math_qa
mathqa_03_00334
a group of students decided to collect as many paise from each member of group as is the number of members . if the total collection amounts to rs . 77.44 , the number of the member is the group is :
[ "57", "67", "77", "88" ]
D
"money collected = ( 77.44 x 100 ) paise = 7744 paise . number of members = square root of 7744 = 88 . answer : option d"
openbookqa
obqa_02_02572
Where would one likely find the least water?
[ "in the elephant's habitat", "in the crab's habitat", "in the cow's habitat", "in the cactus' habitat" ]
D
as dryness increases in an environment , the available water in that environment will decrease
sciq
sciq_01_06347
Skeletal, cardiac, and smooth are the three types of what cells and possess morphologies correlated with their functions?
[ "muscle", "cartilage tissue", "bone", "organ" ]
A
4.4 Muscle Tissue and Motion The three types of muscle cells are skeletal, cardiac, and smooth. Their morphologies match their specific functions in the body. Skeletal muscle is voluntary and responds to conscious stimuli. The cells are striated and multinucleated appearing as long, unbranched cylinders. Cardiac muscle...
ARC-Easy
arc_04_00042
In which environment is white fur color an advantage for survival?
[ "desert", "grassland", "arctic tundra", "temperate forest" ]
C
null
medmcqa
medmcqa_05_01314
Which of the following is an SGLT 2 inhibitor approved for treatment of type 2 diabetes Mellitus
[ "Dulaglutide", "Pramilintide", "Canagliflozin", "Nateglinide" ]
C
Canagliflozin, empagliflozin, dapagliflozin, remogliflozin are sglt 2 inhibitors approved for treatment of type 2 diabetes Ref Harrison 20th edi page no 2866, table 397-5
sciq
sciq_01_02221
Terrestrial biomes are classified by the climate and their what?
[ "pollution", "habitat", "geography", "biodiversity" ]
D
Terrestrial biomes are classified by the climate and their biodiversity , especially the types of primary producers . The world map in Figure below shows where 13 major terrestrial biomes are found.
medmcqa
medmcqa_05_02499
The most life threatening complications of septic abortion includes:
[ "Peritonitis", "Renal failure", "Respiratory distress syndrome", "Septicemia" ]
C
Ans. is c, i.e. Respiratory distress syndromeRef. Dutta Obs. 7/e, p 164, 165; COGDT 10/e, p 987According to COGDT 10/e, p 987"The most common cause of death in patients with this condition is respiratory insufficiency secondary to ARDS."According to Williams Obs. 23/e, p 222"With severe sepsis syndrome, acute respirato...
sciq
sciq_01_09932
What kinds of acids are proteins made out of?
[ "sequence acids", "amino acids", "protein acids", "acetic acids" ]
B
Proteins are organic compounds made up of amino acids.
math_qa
mathqa_03_00378
if a lends rs . 3500 to b at 10 % p . a . and b lends the same sum to c at 11.5 % p . a . , then the gain of b ( in rs . ) in a period of 3 years is
[ "rs . 154.50", "rs . 155.50", "rs . 156.50", "rs . 157.50" ]
D
explanation : we need to calculate the profit of b . it will be , si on the rate b lends - si on the rate b gets gain of b = 3500 × 11.5 × 3 / 100 − 3500 × 10 × 3 / 100 = 157.50 option d
sciq
sciq_01_10464
A d. melanogaster population has an average heterozygosity of what?
[ "22 %", "19 %", "14%", "21 %" ]
C
sciq
sciq_01_00325
What is the long, narrow tube that carries food from the pharynx to the stomach by the mechanism of peristalsis?
[ "liver", "esophagus", "spinal cord", "gallbladder" ]
B
The esophagus is a long, narrow tube that carries food from the pharynx to the stomach. It has no other purpose. Food moves through the esophagus because of peristalsis. At the lower end of the esophagus, a circular muscle, called a sphincter, controls the opening to the stomach. The sphincter relaxes to let food pass ...
ARC-Easy
arc_04_01999
Which best explains the importance of nitrogen in the cycling of energy and matter?
[ "Nitrogen increases protein production in plants.", "Nitrogen decreases protein production in plants.", "Nitrogen decreases the effectiveness of photosynthesis.", "Nitrogen increases the effectiveness of photosynthesis." ]
A
null
medmcqa
medmcqa_05_04164
A 6 months old infant had itchy erythematous papules and exudative lesions on the scalp, face, groin and axillae for one month. She also had vesicular lesions on the palms. What is the most likely diagnosis
[ "Psoriasis", "Scabies", "Congenital syphilis", "Seborrheic dermatitis" ]
B
Scabies * Female itch mite, Sarcoptes scabiei var. hominis * Presents with intense pruritus (worse at night) with symmetric papules, vesicles or indurated nodules typically involving interdigital web spaces, volar wrists, axillae, postauricular areas, ankles, waist, buttocks, waistband area, and genital area; +- visibl...
sciq
sciq_01_05748
Like mitochondria, plastids contain their own what?
[ "riboflavin", "bacteria", "molecule", "dna" ]
D
Like mitochondria, plastids contain their own DNA. Therefore, according to endosymbiotic theory, plastids may also have evolved from ancient, free-living prokaryotes that invaded larger prokaryotic cells. If so, they allowed early eukaryotes to make food and produce oxygen.
sciq
sciq_01_05866
Substances produced by a reaction are known as?
[ "solutions", "minerals", "products", "compounds" ]
C
Products are substances that are produced in the reaction.
math_qa
mathqa_03_02063
31 of the scientists that attended a certain workshop were wolf prize laureates , and 14 of these 31 were also nobel prize laureates . of the scientists that attended that workshop and had not received the wolf prize , the number of scientists that had received the nobel prize was 3 greater than the number of scientist...
[ "a", "b", "c", "d" ]
C
"lets solve by creating equation . . w = 31 . . total = 50 . . not w = 50 - 31 = 19 . . now let people who were neither be x , so out of 19 who won nobel = x + 3 . . so x + x + 3 = 19 or x = 8 . . so who won nobel but not wolf = x + 3 = 11 . . but people who won both w and n = 13 . . so total who won n = 11 + 14 = 25 ....
medmcqa
medmcqa_05_00646
Tzank smear is for -
[ "HZV", "Psittacosis", "Cryptococcus", "Ricketssia" ]
A
Ans is 'a' i.e., HZV o Tzank smear is done for vesiculobullous disorders.Tzank smear findings in bullous disordersDisordersFindingso PemphigusAcantholysiso Bullous pemphigoidPredominantly eosinophilso Varicella-zoster infectionMultinucleated giant cellso Herpes simpex infectionMultinucleated giant cellso Toxic epiderma...
ARC-Easy
arc_04_00604
What kingdom contains organisms that are multicellular, have no chlorophyll, and absorb nutrients from decaying tissue?
[ "Fungi", "Plantae", "Protista", "Animalia" ]
A
null
sciq
sciq_01_05573
Friendly bacteria live mostly in the large intestine and part of the small intestine, because what organ is too acidic?
[ "skin", "liver", "stomach", "rectum" ]
C
Your large intestine is not just made up of cells. It is also an ecosystem , home to trillions of bacteria known as the "gut flora" ( Figure below ). But don't worry, most of these bacteria are helpful. Friendly bacteria live mostly in the large intestine and part of the small intestine. The acidic environment of the s...
sciq
sciq_01_11071
What measures the amount of water in the air?
[ "fire index", "humidity", "temperature", "cloud cover" ]
B
Humidity is the amount of water in the air. Air with a high concentration of water will be called humid. Moving away from the most humid climate, biomes will be called semi-humid, semi-arid, or arid (the driest).
medmcqa
medmcqa_05_01798
Transitional cell epithelium in seen in which ovarian tumour?
[ "Granulosa cell tumor", "Endodermal sinus tumor", "Brenner's tumor", "Hilus cell tumor" ]
C
Ans. C. Brenner's tumor. (Ref Shaw Gynecology 15th/pg. 376)Histology, Brenner's tumor is characterized by background of fibrous tissue; with interspresed transitional epithelium (Walthard cells).Typical Histological findings of few ovarian tumorsHistological findingOvarian tumor1Call exner bodiesGranulosa cell tumor2Sc...
medmcqa
medmcqa_05_00779
Which of the following is acid fast:
[ "Oocyst of Cryptosporidium", "Cyst of entamoeba", "Hydatid disease cyst", "Cysticercus cyst" ]
A
Ans: a (Oocyst of Cryptosporidium) Ref: Harrison, 16th ed, p. 1250Oocyst of Cryptosporidium is acid fastAcid fast organisms include1. Nocardia2. Legionella micoadie3. Bacterial spores4. Rhodococcus5. Isospora6. Mycobacterium7. Spermatic head8. Cryptococcus cyst
medmcqa
medmcqa_05_03877
Buffering is maximum when
[ "pH = pKa", "pH > pKa", "pH < pKa", "No relation to pKa" ]
A
Ans: a (pH = pKa) Ref: Vasudevan 4'k ecU p.346At values close to pKa, the buffer solution resists changes in pH most effectively. Buffering is the tendency of a solution to resist a change in pH more effectively after addition of a strong acid or base tha n does equal volume of water. Solutions of weak acids and their ...
openbookqa
obqa_02_04292
A person may find themselves shading their eyes in the evening if they are driving
[ "from north to east", "from west to east", "from west to south", "from east to west" ]
D
the sun sets in the west
medmcqa
medmcqa_05_01727
Which of the following enzymes is deficient in Criggler Najer syndrome?
[ "UDP glucoronyl transferase 1", "UDP glucoronyl transferase 2", "Bilirubin synthase", "Heme synthase" ]
A
Ans: a (UDP-Glucronyl trans....) Ref: Vasudevan, 4th ed, 256; 5th ed,p. 268; Harper, 23th ed,p. 371In Crigler Najar syndrome there is severe deficiency of UDP-Glucronyl transferase-1.UBG: UrobilinogenUB: UrobilinSB: StercobilinTests for bile pigments:Bilirubin: Fouchets, gmelins, van den berg.Bilinogens: (UBG) Ehrlich ...
sciq
sciq_01_05591
The converging of continental plates can form what kind of geological feature?
[ "streams", "plains", "shores", "mountains" ]
D
When two continental plates converge, they smash together and create mountains.
sciq
sciq_01_01912
Living things need to take in nutrients so that they can grow and create what?
[ "hydrogen", "plasma", "protein", "energy" ]
D
ARC-Challenge
arc_04_02169
Heat, light, and sound are all different forms of ___.
[ "fuel", "energy", "matter", "electricity" ]
B
null
openbookqa
obqa_02_00754
How do Remora get their food?
[ "catch it", "scavenge", "hunt", "steal" ]
B
remora fish eat food by attaching themselves to sharks and eating the food left behind
math_qa
mathqa_03_04857
30 men can do a work in 40 days . when should 14 men leave the work so that the entire work is completed in 40 days after they leave the work ?
[ "87 days", "16 days", "55 days", "44 days" ]
B
"total work to be done = 30 * 40 = 1200 let 14 men leave the work after ' p ' days , so that the remaining work is completed in 40 days after they leave the work . 40 p + ( 14 * 40 ) = 1200 40 p = 640 = > p = 16 days answer : b"
math_qa
mathqa_03_04634
abcd is a square . f and e are the midpoints of sides ad and cd , respectively . the area of triangle fed is 2 square inches . what is the area of square abcd ( in square inches ) ?
[ "4'", "8'", "16'", "32'" ]
C
area of fed = 2 sq inches = 1 / 2 * de * fd = 1 / 2 * de ^ 2 because the sides of a square are equal , hence half of the sides will also be equal . de ^ 2 = 4 de = fd = 2 hence the side of the square = 4 area if the square = 4 * 4 = 16 correct option : c
sciq
sciq_01_08562
Lactose intolerance is a condition characterized by indigestion caused by this?
[ "dairy products", "pasteurized products", "raw products", "fried products" ]
A
Small Intestine: Lactose Intolerance Lactose intolerance is a condition characterized by indigestion caused by dairy products. It occurs when the absorptive cells of the small intestine do not produce enough lactase, the enzyme that digests the milk sugar lactose. In most mammals, lactose intolerance increases with age...
medmcqa
medmcqa_05_02175
Most common phase I biotransformation reaction is?
[ "Oxidation", "Hydrolysis", "Cyclisation", "Reduction" ]
A
Ans. is 'a' i.e., Oxidation Oxidation is the most impoant metabolizing reaction.
sciq
sciq_01_08723
Obligate anaerobes live and grow in the absence of what?
[ "molecular carbon", "molecular oxygen", "atomic oxygen", "molecular nitrogen" ]
B
Visit this site (http://openstaxcollege. org/l/fermentation2) to see anaerobic cellular respiration in action. Other fermentation methods occur in bacteria. Many prokaryotes are facultatively anaerobic. This means that they can switch between aerobic respiration and fermentation, depending on the availability of oxygen...
openbookqa
obqa_02_02746
Which of the following would best describe why a lizard would live in a desert?
[ "it can eat bugs and withstand very cold weather", "it can eat fish and withstand very cold weather", "it can eat bugs and withstand very hot weather", "it can eat fish and withstand very cold weather" ]
C
some lizards live in desert habitats
sciq
sciq_01_06795
Every chemical reaction between molecules involves breaking and forming of what?
[ "ions", "bonds", "atomic pathways", "orbits" ]
B
math_qa
mathqa_03_01572
the ratio between the number of sheep and the number of horses at the stewar farm is 2 to 7 . if each of horse is fed 230 ounces of horse food per day and the farm needs a total 12880 ounces of horse food per day . what is number sheep in the form ? ?
[ "18", "16", "32", "56" ]
B
"et no of sheep and horses are 2 k and 7 k no of horses = 12880 / 230 = 56 now 7 k = 56 and k = 8 no of sheep = ( 2 * 8 ) = 16 answer : b"
medmcqa
medmcqa_05_00763
Daily dose of albendazole in neurocysticercosis in children is?
[ "1-3 mg per kg", "4 to 8 mg per kg", "15 mg per kg", "25 mg per kg" ]
C
Ans. (c) 15 mg per kgRef Goodman Gillman 11/e, p 699, 1819, Harrison's 17/, Chapter 213, KDT 6/e, p 810, Nelson textbook of pediatrics, 18/e, chapter 300
math_qa
mathqa_03_03014
a sells a bicycle to b at a profit of 20 % . b sells it to c at a profit of 25 % . if c pays rs . 225 for it , the cost price of the bicycle for a is
[ "627", "297", "127", "150" ]
D
explanation : 125 % of 120 % of a = 225 125 / 100 * 120 / 100 * a = 225 a = 225 * 2 / 3 = 150 . answer : d
medmcqa
medmcqa_05_01259
Which of the following infection is most commonly related to aplastic anemia?
[ "Hepatitis", "H. pylori infection", "Tetanus", "Bacteremia" ]
A
Hepatitis is the most common preceding infection and posthepatitis marrow failure accounts for approximately 5% of etiologies in most series.
medmcqa
medmcqa_05_01606
Arrange Mapelson circuit for spontaneous ventilation in an adult from best to worst
[ "D>B>C>A", "A>C>B>D", "A>D>C>B", "B>C>D>A" ]
C
During spontaneous ventilation, alveolar gas containing Co2 will be exhaled into the breathing tube or directly vented through an open APL valve. Before inhalation occurs, if the fresh gas flow exceeds alveolar minute ventilation, the in flow of fresh gas will force the alveolar gas remaining in the breathing tube to e...
math_qa
mathqa_03_04908
if f ( f ( n ) ) + f ( n ) = 2 n + 3 , f ( 0 ) = 1 then f ( 2015 ) = ?
[ "2016", "2088", "270", "1881" ]
A
"f ( f ( 0 ) ) + f ( 0 ) = 2 ( 0 ) + 3 ⇒ ⇒ f ( 1 ) = 3 - 1 = 2 , f ( 1 ) = 2 f ( f ( 1 ) ) + f ( 1 ) = 2 ( 1 ) + 3 ⇒ ⇒ f ( 2 ) = 5 - 2 = 3 , f ( 2 ) = 3 f ( f ( 2 ) ) + f ( 2 ) = 2 ( 2 ) + 3 ⇒ ⇒ f ( 3 ) = 7 - 3 = 4 , f ( 3 ) = 4 . . . . . . . . . . . . . . f ( 2015 ) = 2016 ans : a"
sciq
sciq_01_00941
What type of living things break down dead organisms and recycle their nutrients into the soil?
[ "probiotics", "decomposers", "producers", "consumers" ]
B
sciq
sciq_01_07903
What hypothesis states that the biosphere is its own living organism
[ "small world theory", "Big Bang theory", "the gaia hypothesis", "the seager hypothesis" ]
C
The Gaia hypothesis states that the biosphere is its own living organism.
sciq
sciq_01_03155
What type of mining is used to recover ores that are deeper into earth’s surface?
[ "underwater mining", "underground", "explosive mining", "deep mining" ]
B
Underground mining is used to recover ores that are deeper into Earth’s surface. Miners blast and tunnel into rock to gain access to the ores. An underground ore deposit can be approached from above, below, or sideways. The direction depends on the placement of the ore body, its depth, the concentration of ore, and the...
sciq
sciq_01_03993
What kind of eruption do scientists think is caused by a very large magma chamber erupting entirely in one catastrophic explosion?
[ "supermagma eruption", "supervolcano eruption", "mangxamba eruption", "brucei eruption" ]
B
The exact cause of supervolcano eruptions is still debated. However, scientists think that a very large magma chamber erupts entirely in one catastrophic explosion. This creates a caldera into which the surface collapses ( Figure below ). The composition of the eruption is felsic or highly felsic.
math_qa
mathqa_03_03360
according to the direction on a can of frozen orange juice concentrate is to be mixed with 3 cans of water to make orange juice . how many 20 - ounce cans of the concentrate are required to prepare 200 6 - ounce servings of orange juice ?
[ "15", "34", "50", "67" ]
A
"orange juice concentrate : water : : 1 : 3 total quantity of orange juice = 200 * 6 = 1200 oz so orange juice concentrate : water : : 300 oz : 900 oz no . of 20 oz can = 300 oz / 20 oz = 15 answer a , 15 cans"
sciq
sciq_01_03842
What are the three forms of water as found in nature?
[ "solid, liquid, gas", "solid , mixture , gas", "balanced , liquid , gas", "ice, vapor, sleet" ]
A
math_qa
mathqa_03_01063
the average weight of 8 person ' s increases by 2.5 kg when a new person comes in place of one of them weighing 55 kg . what might be the weight of the new person ?
[ "56 kg", "90 kg", "75 kg", "data inadequate" ]
C
"c 75 kg total weight increased = ( 8 x 2.5 ) kg = 20 kg . weight of new person = ( 55 + 20 ) kg = 75 kg ."
sciq
sciq_01_06266
What two activities are especially important when a number of local populations are linked, forming a metapopulation?
[ "immigration and emigration", "flow and emigration", "immigration and family reunions", "family reunions and emigration" ]
A