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openbookqa
obqa_02_01958
An arid region has very little
[ "rocks", "heat", "food", "sand" ]
C
a desert environment contains very little food
openbookqa
obqa_02_04042
Falcons reside best in
[ "volcanoes", "Scottish moors", "tar pits", "ocean trenches" ]
B
animals live and feed near their habitats
openbookqa
obqa_02_01175
A specific plant is found
[ "in some areas", "in outer space", "nowhere", "in all areas" ]
A
a plant requires a specific climate to grow and survive
sciq
sciq_01_02322
The atmosphere consists of oxygen, nitrogen, carbon dioxide, which exerts a certain pressure referred to as what?
[ "gravity pressure", "nitrogen pressure", "tidal pressure", "atmospheric pressure" ]
D
Gas Laws and Air Composition Gas molecules exert force on the surfaces with which they are in contact; this force is called pressure. In natural systems, gases are normally present as a mixture of different types of molecules. For example, the atmosphere consists of oxygen, nitrogen, carbon dioxide, and other gaseous m...
openbookqa
obqa_02_00311
celestial bodies are known to
[ "circle balls of hydrogen", "travel through deep space", "crash into each other", "slingshot around the galaxy" ]
A
planets orbit stars
sciq
sciq_01_09455
The appendicular skeleton includes all bones of the upper and lower limbs, plus the bones that attach each limb to the what?
[ "compressed skeleton", "dynamic skeleton", "axial skeleton", "literal skeleton" ]
C
The Appendicular Skeleton The appendicular skeleton includes all bones of the upper and lower limbs, plus the bones that attach each limb to the axial skeleton. There are 126 bones in the appendicular skeleton of an adult. The bones of the appendicular skeleton are covered in a separate chapter.
sciq
sciq_01_05446
About one-third of the human cerebral cortex is dedicated to analyzing and perceiving information related to what sense?
[ "taste", "touch", "vision", "hearing" ]
C
36.5 | Vision By the end of this section, you will be able to: • Explain how electromagnetic waves differs from sound waves • Trace the path of light through the eye to the point of the optic nerve • Explain tonic activity as it is manifested in photoreceptors in the retina Vision is the ability to detect light pattern...
sciq
sciq_01_00044
Gases are most ideal at high temperature and what pressure?
[ "low", "high", "absolute", "stable" ]
A
Under what conditions then, do gases behave least ideally? When a gas is put under high pressure, its molecules are forced closer together as the empty space between the particles is diminished. A decrease in the empty space means that the assumption that the volume of the particles themselves is negligible is less val...
sciq
sciq_01_03068
Meissner’s corpuscles are not as plentiful in the palms as they are in the what other part of the hand?
[ "bones", "fingernails", "fingertips", "cuticles" ]
C
Which of the following statements about mechanoreceptors is false? a. Pacini corpuscles are found in both glabrous and hairy skin. Merkel’s disks are abundant on the fingertips and lips. Ruffini endings are encapsulated mechanoreceptors. Meissner’s corpuscles extend into the lower dermis. Meissner’s corpuscles, (shown ...
sciq
sciq_01_06029
What type of current carries warm air from surrounding rocks to an animal's body?
[ "convection", "electric", "ventilation", "radiation" ]
A
Heat Transfer to an Ectothermic Reptile. This crocodile is being warmed by the environment in three ways. Heat is radiating directly from the sun to the animal’s back. Heat is also being conducted to the animal from the rocks it rests on. In addition, convection currents are carrying warm air from surrounding rocks to ...
sciq
sciq_01_07044
In artificial passive immunization, which items from an immune animal are injected into a nonimmune animal?
[ "platelets", "antibodies", "allergies", "parasites" ]
B
openbookqa
obqa_02_00573
There is more rain when the sky is
[ "gray", "red", "blue", "white" ]
A
if weather is stormy then there is a greater chance of rain
openbookqa
obqa_02_01406
A computer needs what to be functional
[ "money", "positive ions", "a mommy", "youtube" ]
B
electric devices require electrical energy to function
openbookqa
obqa_02_00169
A fundamental feature of all life produces
[ "offspring", "auroras", "magnetism", "organisms" ]
A
reproduction produces offspring
openbookqa
obqa_02_03381
Coal mines are an essential for what industries?
[ "soft drink manufacturing", "textiles", "energy generation", "powering airplanes" ]
C
coal mine is a source of coal under the ground
medmcqa
medmcqa_05_01883
Hook worm is related with
[ "Chandler's index", "Metaform index", "MELD score", "Burrows in skin" ]
A
Chandler's index is the no. of hookworms present in 1 gram of faeces <200 no significance 200-250 potential danger 250-300 minor public health problem >300 major health problem
medmcqa
medmcqa_05_00301
Which is the most common complication of GERD
[ "Esophagitis", "Strictures", "Dental damage", "Vocal cord damage" ]
A
Esophagitis is the most common complication
sciq
sciq_01_06568
How many more times likely are men to suffer from iron overload?
[ "twenty times", "two times", "ten times", "eight times" ]
C
ARC-Challenge
arc_04_03023
A student is given a liquid compound in a beaker. Which of the following is the best way to describe this liquid compound?
[ "definite shape, indefinite volume", "indefinite shape, indefinite volume", "definite shape, definite volume", "indefinite shape, definite volume" ]
D
null
ARC-Challenge
arc_04_02347
A male fruit fly is homozygous dominant for gray-body color (G) and is crossed with a female fruit fly that is homozygous recessive for ebony-body color (g). What are the probable phenotypes of the offspring?
[ "25% gray, 75% ebony", "50% gray, 50% ebony", "100% ebony", "100% gray" ]
D
null
medmcqa
medmcqa_05_03334
Most common type of veex presentation: March 2005
[ "Right Occipito Posterior", "Left Occipito posterior", "Right Occipito Anterior", "Left occipito anterior" ]
D
Ans. D: Left Occipito Anterior Fetal presentation: Cephalic (head-first) presentation: Cephalic presentation is considered normal and occurs in about 96.5% of deliveries. There are different types of cephalic presentation, which depend on the fetal attitude. Veex occupying the left anterior quadrant of the pelvis is th...
sciq
sciq_01_00490
Displacement, velocity, acceleration, and force are examples of what type of quantity that has magnitude and direction?
[ "vector", "wave", "frequency", "cycles" ]
A
Vectors in Two Dimensions A vector is a quantity that has magnitude and direction. Displacement, velocity, acceleration, and force, for example, are all vectors. In one-dimensional, or straight-line, motion, the direction of a vector can be given simply by a plus or minus sign. In two dimensions (2-d), however, we spec...
sciq
sciq_01_07620
What type of plants do not typically require deep roots or woody stems?
[ "surface plants", "aquatic plants", "dry plants", "bacterial plants" ]
B
Modern plants that live in water are called aquatic plants . Living in water has certain advantages for plants. One advantage is, well, the water. There's plenty of it and it's all around. Therefore, most aquatic plants do not need adaptations for absorbing, transporting, and conserving water. They can save energy and ...
sciq
sciq_01_07123
What is the long-term average of weather in a particular spot called?
[ "temperature", "weather", "climate", "migration" ]
C
Almost anything can happen with the weather. Climate, however, is more predictable. Climate is the long-term average of weather in a particular spot. Good climate is why we choose to vacation in Hawaii in February (usually on the leeward side). Of course, the weather is not guaranteed to be good! A location’s climate c...
math_qa
mathqa_03_01774
the annual interest rate earned by an investment increased by 10 percent from last year to this year . if the annual interest rate earned by the investment this year was 15 percent , what was the annual interest rate last year ?
[ "14.04 %", "15.04 %", "13.64 %", "12.04 %" ]
C
"let i = interest rate i ( this year ) = i ( last year ) + 0.1 i ( last year ) = 1.1 i ( last year ) 15 = 1.1 x i ( last year ) i ( last year ) = 15 / 1.1 = 150 / 11 = 13.64 % answer : c"
ARC-Easy
arc_04_00914
Wind can cause erosion that changes the surface of the Earth. Wind erosion can have negative effects on the environment by removing soil and polluting the air during dust storms. Which of the following land forms are created by wind erosion?
[ "arches and faults", "sand dunes and arches", "meanders and moraines", "moraines and sand dunes" ]
B
null
math_qa
mathqa_03_02658
the amount of an investment will double in approximately 70 / p years , where p is the percent interest , compounded annually . if thelma invests $ 50,000 in a long - term cd that pays 5 percent interest , compounded annually , what will be the approximate total value of the investment when thelma is ready to retire 42...
[ "$ 280,000", "$ 320,000", "$ 360,000", "$ 400,000" ]
D
"the amount of an investment will double in approximately 70 / p years , where p is the percent interest , compounded annually . if thelma invests $ 50,000 in a long - term cd that pays 5 percent interest , compounded annually , what will be the approximate total value of the investment when thelma is ready to retire 4...
math_qa
mathqa_03_00074
6 women can do 75 unit of work in 8 days by working 5 hr / day in how many days 4 women do 30 units of work by working 8 hr / day
[ "3", "4", "5", "6" ]
A
( 6 x 8 x 5 ) / 75 = ( ax 4 x 8 ) / 30 a = 3 answer : a
sciq
sciq_01_09749
Does the stream-lined body featured on most fish increase or decrease water resistance?
[ "quickens", "decrease", "precipitates", "increases" ]
B
Fish typically have a stream-lined body. This reduces water resistance.
math_qa
mathqa_03_00353
tough and tricky questions : arithmetic . ( 56 ^ 2 + 56 ^ 2 ) / 28 ^ 2 =
[ "4", "18", "29", "8" ]
D
ans is 8 my approach was : ( 56 ^ 2 + 56 ^ 2 ) / 28 ^ 2 = 56 ( 56 + 56 ) / 28 * 28 = 56 * 112 / 28 * 28 = 2 * 4 = 8 d
sciq
sciq_01_00931
Mammals that lay eggs are called what?
[ "marsupial", "monotremes", "viviparous", "herbivores" ]
B
Mammals have separate sexes and reproduce sexually. They produce eggs or sperm and must mate in order for fertilization to occur. A few mammals are oviparous. They lay eggs, which later hatch. These mammals are called monotremes. Most mammals are viviparous and give birth to live young. These mammals are either placent...
sciq
sciq_01_06598
What is the most common type of organic compound?
[ "proteins", "carbohydrates", "fats", "vitamins" ]
B
Carbohydrates are the most common type of organic compound. A carbohydrate is an organic compound such as sugar or starch, and is used to store energy. Like most organic compounds, carbohydrates are built of small, repeating units that form bonds with each other to make a larger molecule. In the case of carbohydrates, ...
ARC-Easy
arc_04_00704
A fever is a response to a disease-causing agent infecting the body. Raising one's body temperature changes the shape of enzymes in the agent so it cannot reproduce. Which statement best describes a fever?
[ "A fever is an internal response to an external stimulus.", "A fever is an internal response to an internal stimulus.", "A fever is an external response to an external stimulus.", "A fever is an external response to an internal stimulus." ]
B
null
medmcqa
medmcqa_05_04335
A child presented with difficulty in seeing the blackboard in school. His teachers say that he frequently squeezes his eyes. Most probable cause is:
[ "Hypermetropia", "Myopia", "Presbyopia", "Astigmatism" ]
B
B i.e. Myopia Myopia or 'Sho sight' is a refractive error that most commonly presents as indistinct distant vision in which the light rays are focussed in front of the retina. As the maximum distance of clear vision is reduced the far point has come nearer. Myopia in children The child squeezes his eye in order to redu...
sciq
sciq_01_10849
What is needed by all known forms of life?
[ "water", "warmth", "air", "nitrogen" ]
A
Water is needed by all known forms of life.
openbookqa
obqa_02_01962
High humidity can damage materials which
[ "must remain dry to function", "will dry out unless they are soaked in water", "depend on abundance amounts of water vapor", "need to be kept wet" ]
A
An example of moisture is water vapor in the atmosphere
sciq
sciq_01_03210
Subducting plate and epicenter are terms related to what phenomenon?
[ "eruption", "earthquake", "tidal wave", "hurricane" ]
B
A cross section of earthquake epicenters. The depth outlines the subducting plate. There are shallow, intermediate, and deep earthquakes.
openbookqa
obqa_02_00058
The leaves of a plant benefit from?
[ "dog", "sun", "human", "dust" ]
B
chlorophyll is used for absorbing light energy by plants
sciq
sciq_01_01209
While still an early fetus, what is the skeleton made of?
[ "ligament", "membrane", "gel", "cartilage" ]
D
Early in the development of a human fetus, the skeleton is made entirely of cartilage. The relatively soft cartilage gradually turns into hard bone through ossification . This is a process in which mineral deposits replace cartilage. As shown in Figure below , ossification of long bones, which are found in the arms and...
math_qa
mathqa_03_03109
if x ^ 2 + ( 1 / x ^ 2 ) = 5 , x ^ 4 + ( 1 / x ^ 4 ) = ?
[ "23", "11", "12", "14" ]
A
"- > x ^ 4 + ( 1 / x ^ 4 ) = ( x ^ 2 ) ^ 2 + ( 1 / x ^ 2 ) ^ 2 = ( x ^ 2 + 1 / x ^ 2 ) ^ 2 - 2 x ^ 2 ( 1 / x ^ 2 ) = 5 ^ 2 - 2 = 23 . thus , the answer is a ."
sciq
sciq_01_01439
The combined gas law involves three properties of a gas - volume, absolute temperature, and what?
[ "pressure", "power", "direction", "time" ]
A
To this point, we have examined the relationships between any two of the variables of , , and , while the third variable is held constant. However, situations arise where all three variables change. The combined gas law expresses the relationship between the pressure, volume, and absolute temperature of a fixed amount ...
math_qa
mathqa_03_01985
the area of a circle is increased by 1500 % . by what percent has the diameter of the circle increased ?
[ "100 %", "500 %", "300 %", "600 %" ]
B
"the area of the circle is increased by 1500 % , thus the area is increased 16 times . the area of a circle it proportional to the square of the diameter ( area = π d ^ 2 / 4 ) , therefore the diameter must increase 4 times ( diameter increase 4 times = area increase 16 times ) , which is increase by 500 % . answer : b...
medmcqa
medmcqa_05_03533
First immunoglobulin to appear following infection-
[ "IgG", "IgM", "IgA", "IgE" ]
B
Ans. is 'b' i.e., IgM
math_qa
mathqa_03_04315
two trains are moving in the same direction at 72 kmph and 36 kmph . the faster train crosses a man in the slower train in 20 seconds . find the length of the faster train ?
[ "270", "277", "200", "257" ]
C
"relative speed = ( 72 - 36 ) * 5 / 18 = 2 * 5 = 10 mps . distance covered in 27 sec = 20 * 10 = 200 m . the length of the faster train = 200 m . answer : c"
sciq
sciq_01_10041
What are the tiny sacs in the lungs where gas exchange takes place?
[ "alveoli", "vacuoles", "ganglion", "chambers" ]
A
Pneumonia is an illness that occurs when the alveoli, the tiny sacs in the lungs where gas exchange takes place, become inflamed and filled with fluid. When a person has pneumonia, gas exchange cannot occur properly across the alveoli. Pneumonia can be caused by many things. Infection by bacteria, viruses, fungi, or pa...
ARC-Easy
arc_04_00436
What would a warm air mass over the ocean most likely cause?
[ "earthquake", "snowfall", "tsunami", "rainfall" ]
D
null
sciq
sciq_01_02277
What type of joint is the knee joint?
[ "hinge joint", "ball joint", "condyloid joint", "pivot joint" ]
A
Hinge Joint. The knee joint is a hinge joint. Like a door hinge, a hinge joint allows backward and forward movement.
sciq
sciq_01_10404
What is the term for water that falls from clouds?
[ "precipitation", "atmosphere", "lightning", "wind" ]
A
Precipitation is water that falls from clouds. It may fall as liquid or frozen water. Types of frozen precipitation include snow, sleet, freezing rain, and hail.
medmcqa
medmcqa_05_03853
Most important epidemiological tool used for assessing disability in children is –
[ "Activities of Daily Living (ADL) scale.", "Wing's Handicaps, Behaviour and Skills (HBS) Schedule", "Binet and Simon IQ tests", "Physical Quality of Life Index (PQL 1)" ]
B
There have been many attempts to measure or record in standardized form the aspects of behaviors, psychological function and social performance One of the most important is Wing's Comprehensive Handicaps, II Behavior and Skills (HBS) schedule It has been used in epidemiological studies to assess the total child popul...
sciq
sciq_01_02921
Seed plants that produce seeds in the ovaries of their flowers are known as what?
[ "spores", "gymnosperms", "angiosperms", "conifers" ]
C
Angiosperms are seed plants that produce seeds in the ovaries of flowers. Today, they are by far the most diverse type of seed plants. In fact, the vast majority of all modern plants are angiosperms. There are hundreds of thousands of species of them. The apple tree in Figure below is an example of a common angiosperm.
sciq
sciq_01_08065
Attraction of a material by a magnet is an example of what type of property?
[ "transitive", "thermal", "chemical", "physical" ]
D
Iron filings are attracted by a magnet. This is a physical property of iron but not of most other materials, including sand. How could you use this difference in physical properties to separate a mixture of iron filings and sand?.
ARC-Challenge
arc_04_02732
Which is a major function of the vacuoles found in cells?
[ "to store water and food for cells", "to release energy for cells", "to control what enters and leaves cells", "to provide protection for cells" ]
A
null
sciq
sciq_01_10575
Early in the development of a human fetus, the skeleton is made entirely of what?
[ "cartilage", "anterior", "bones", "membrane" ]
A
Early in the development of a human fetus, the skeleton is made entirely of cartilage. The relatively soft cartilage gradually changes to hard bone through ossification. This is a process in which mineral deposits replace cartilage in bone. At birth, several areas of cartilage remain, including the ends of the long bon...
medmcqa
medmcqa_05_04883
Thierisch graft is which type of graft
[ "Partial thickness", "Full thickness", "Pedicle", "Patch" ]
A
Ans. a (Partial thickness). (Ref. Bailey and Love, 25th/pg. 395)SPLIT THICKNESS (THIERSCH)FULL THICKNESS (WOLFE)Donor site factor; 1 Large area availableSmaller area available2 Donor site heals spontaneouslyDonor site must be closed3 Reusable donor siteDonor site scarsReceipient site factors; 1 Poor colour matchGood co...
openbookqa
obqa_02_02755
Which of the following substances likely contains plant seeds?
[ "sweat", "poop", "urine", "blood" ]
B
plant requires seed dispersal for reproduction
math_qa
mathqa_03_04506
jean drew a gumball at random from a jar of pink and blue gumballs . since the gumball she selected was blue and she wanted a pink one , she replaced it and drew another . the second gumball also happened to be blue and she replaced it as well . if the probability of her drawing the two blue gumballs was 16 / 36 , what...
[ "1 / 49", "4 / 7", "3 / 7", "1 / 3" ]
D
"the probability of drawing a pink gumball both times is the same . the probability that she drew two blue gumballs = 16 / 36 = ( 2 / 3 ) * ( 2 / 3 ) therefore probability that the next one she draws is pink = 1 / 3 option ( d )"
ARC-Easy
arc_04_01687
When an octopus feels threatened, it can release black ink into the water. The ink MOST likely helps the octopus
[ "move quickly through the water.", "breathe oxygen from the water.", "hide from predators.", "use food faster." ]
C
null
sciq
sciq_01_01721
Living things get energy from food in a process called respiration, which releases what gas back into the atmosphere?
[ "carbon dioxide", "oxygen", "nitrogen", "hydrogen" ]
A
Carbon doesn’t stop there. Living things get energy from food in a process called respiration. This releases carbon dioxide back into the atmosphere. The cycle then repeats.
medmcqa
medmcqa_05_02509
Early change of pulmonary edema in CXR:
[ "Batswing appearance", "Pleural effusion", "Kerley B lines", "Ground gram lung field" ]
C
Ans. Kerley B lines
math_qa
mathqa_03_04408
a dog breeder currently has 9 breeding dogs . 6 of the dogs have exactly 1 littermate , and 3 of the dogs have exactly 2 littermates . if 2 dogs are selected at random , what is the probability q that both selected dogs are not littermates ?
[ "1 / 6", "2 / 9", "5 / 6", "7 / 9" ]
C
"we have three pairs of dogs for the 6 with exactly one littermate , and one triplet , with each having exactly two littermates . so , in fact there are two types of dogs : those with one littermate - say a , and the others with two littermates - b . work with probabilities : choosing two dogs , we can have either one ...
math_qa
mathqa_03_02863
if the numerator of a fraction be increased by 20 % and its denominator be diminished by 10 % , the value of the fraction is 20 / 21 . find the original fraction ?
[ "1 / 2", "3 / 5", "4 / 7", "5 / 7" ]
D
"let the original fraction be x / y then , 120 % of x / 90 % of y = 20 / 21 120 x / 90 y = 20 / 21 x / y = 5 / 7 answer is d"
openbookqa
obqa_02_04199
thermal energy insulators are often good electrical insulators like:
[ "metallic rocks on the ground", "fan on the ceiling", "the rubber sandwiched between two iron slabs", "metal knives for sale" ]
C
wood is an electrical energy insulator
medmcqa
medmcqa_05_04681
Which of the following is most common symptom of tetanus
[ "Risus sardonicus", "Trismus", "Hyperreflexia", "Tonic clonic convulsion" ]
B
Trismus, due to spasm of masseter and pterygoids is the most common symptom of tetanus.
openbookqa
obqa_02_03304
If you touch a wall wart which hasn't been on in weeks, it'll feel
[ "very warm", "cold", "hot", "moderately warm" ]
B
electrical current running through a wire causes that wire to heat up
medmcqa
medmcqa_05_01558
Which radiological procedure is used for studying vesico-ureteric reflux?
[ "Ascending pyelogram", "Cystogram", "Intravenous urogram", "Micturition cystourethrogram" ]
D
The diagnosis of vesico ureteric reflux is made using micturition cystourethrogram. Other techniques used in diagnosing vesico ureteric reflux are simple or delayed cystography or voiding cinefluoroscopy. In a case of vesico ureteral reflux, cystogram may show one of the following findings: Persistently dilated lower u...
math_qa
mathqa_03_00718
the average height of 20 girls out of a class of 50 is 142 cm . and that of the remaining girls is 149 cm . the average height of the whole class is :
[ "146.2 cms", "146.5 cms", "146.9 cms", "142.2 cms" ]
A
"explanation : average height of the whole class = ( 20 × 142 + 30 × 149 / 50 ) = 146.2 cms answer a"
sciq
sciq_01_06825
What are large sheets of ice that cover relatively flat ground called?
[ "land glaciers", "rocky glaciers", "cellular glaciers", "continental glaciers" ]
D
Continental glaciers are large ice sheets that cover relatively flat ground. These glaciers flow outward from where the greatest amounts of snow and ice accumulate.
openbookqa
obqa_02_02291
Which of these most closely resembles how clouds come into being?
[ "making beer", "distilling liquor", "driving a car", "baking bread" ]
B
water vapor condensing in clouds causes rain
openbookqa
obqa_02_04694
Which is likely to cause a spark?
[ "ocean sand", "wet dirt", "swamp mud", "loose brush" ]
D
dry wood easily burns
math_qa
mathqa_03_02055
what is the rate percent when the simple interest on rs . 9100 amount to rs . 455 in 3 years ?
[ "3.7 %", "5.7 %", "6.7 %", "8.7 %" ]
A
"455 = ( 4100 * 3 * r ) / 100 r = 3.7 % answer : a"
ARC-Easy
arc_04_01565
What motion causes day and night?
[ "revolution of Earth", "revolution of the Moon", "rotation of Earth", "rotation of the Moon" ]
C
null
medmcqa
medmcqa_05_00533
Treatment of choice in attention deficit hyperactivity disorder is:
[ "Haloperidol", "Imipramine", "Alprazolam", "Methylphenidate" ]
D
Ans. D: MethylphenidatePsychomotor stimulants like dextroamphetamine, methylphenidate, and pemoline have beneficial effects in ADHD when given for 1-3 months. Methylphenidate is preferred.Attention deficit hyperactivity disorder/ADHD/AD and HD/ADDIt is a developmental disorder.It is primarily characterized by "the co-e...
openbookqa
obqa_02_00510
I left a statue outside away from water for 100 years, when I come back it is significantly smaller, why?
[ "The Wind", "Birds", "Tiny Trolls", "Ants" ]
A
wind causes erosion
sciq
sciq_01_04001
What shape is each face of a tetrahedron?
[ "asymmetric triangle", "oval", "trapezoid", "equilateral triangle" ]
D
In order to maximize their distance from one another, the four groups of bonding electrons do not lie in the same plane. Instead, each of the hydrogen atoms lies at the corners of a geometrical shape called a tetrahedron. The carbon atom is at the center of the tetrahedron. Each face of a tetrahedron is an equilateral ...
sciq
sciq_01_01719
The idea of evolution has been around for centuries. in fact, it goes all the way back to the ancient greek philosopher named?
[ "Pluto", "Galileo", "Xerxes", "aristotle" ]
D
The idea of evolution has been around for centuries. In fact, it goes all the way back to the ancient Greek philosopher Aristotle. However, evolution is most often associated with Charles Darwin. Darwin published a book on evolution in 1859 titled On the Origin of Species . In the book, Darwin stated the theory of evol...
ARC-Easy
arc_04_01706
In the human body the digestion of proteins takes place primarily in which two organs?
[ "Mouth and stomach", "Stomach and small intestine", "Liver and gall bladder", "Pancreas and large intestine" ]
B
null
medmcqa
medmcqa_05_02866
Tumour most sensitive to radiotherapy is
[ "Osteogenic sarcoma", "Ewing's sarcoma", "Multiple myeloma", "Osteoclastoma" ]
B
EWING'S SARCOMA: This is highly malignant tumour occurring between the age of 10-20 years, sometimes up to 30 years. This is a highly radiosensitive tumour, melts quickly but recurs. In most cases, distant metastasis has occurred by the time diagnosis is made. Treatment consists of control of local tumour by radiothera...
medmcqa
medmcqa_05_03347
Pacemaker is indicated in which of the following condition: September 2007
[ "Acute myocardial infarction with first degree AV block", "Acute myocardial infarction with fascicular block", "Sick sinus syndrome", "Sick sinus syndrome" ]
C
Ans. C: Sick sinus syndrome Pacemaker indications Absolute indications for pacemaker placement include the following: Sick sinus syndrome Symptomatic sinus bradycardia Tachy-brady syndrome Atrial fibrillation with sinus node dysfunction Third-degree block/Complete AV block Chronotropic incompetence (inability to increa...
ARC-Easy
arc_04_00846
Many areas of Massachusetts have small deep ponds called kettle ponds. Which of the following best explains the formation of these ponds?
[ "avalanche", "wind erosion", "glacial depression", "sediment deposition" ]
C
null
medmcqa
medmcqa_05_03638
Incubation period for Nector americanus -
[ "1 week", "2 weeks", "3 weeks", "5-6 weeks" ]
D
Ans. is 'd' i.e., 5-6 weeks o Following penetration, N-americanus migrates to the lung within about 10 days.o After 3-5 weaks, it passes through the GIT and attaches to the intestinal mucosa, where it matures into the adult worm and may stay for up to ~ 5 yearso The average period between larva penetration and egg prod...
sciq
sciq_01_09875
The cell theory and the theory of evolution by natural selection are basic to all fields in what branch of science?
[ "rock science", "zoology", "chemistry", "life science" ]
D
Each field of life science has its own specific body of knowledge and relevant theories. However, two theories are basic to all of the life sciences. They form the foundation of every life science field. They are the cell theory and the theory of evolution by natural selection. Both theories have been tested repeatedly...
sciq
sciq_01_11514
What is the leading cause of lung cancer?
[ "chewing tobacco", "tobacco smoke", "heredity", "tuberculosis" ]
B
Tobacco smoke contains dozens of carcinogens, including nicotine and formaldehyde. Exposure to tobacco smoke is the leading cause of lung cancer.
math_qa
mathqa_03_00903
in a competitive examination in state a , 6 % candidates got selected from the total appeared candidates . state b had an equal number of candidates appeared and 7 % candidates got selected with 79 more candidates got selected than a . what was the number of candidates appeared from each state ?
[ "7000", "7900", "6000", "5000" ]
B
"state a and state b had an equal number of candidates appeared . in state a , 6 % candidates got selected from the total appeared candidates in state b , 7 % candidates got selected from the total appeared candidates but in state b , 79 more candidates got selected than state a from these , it is clear that 1 % of the...
sciq
sciq_01_03563
The period immediately following the transmission of an impulse in a nerve or muscle, in which a neuron or muscle cell regains its ability to transmit another impulse, is called the ______ period.
[ "refractory", "interstitial", "activation", "extraction" ]
A
The deadly nerve gas Sarin irreversibly inhibits acetycholinesterase. What effect would Sarin have on muscle contraction? After depolarization, the membrane returns to its resting state. This is called repolarization, during which voltagegated sodium channels close. Potassium channels continue at 90% conductance. Becau...
math_qa
mathqa_03_00577
running at their respective constant rates , machine x takes 2 days longer to produce w widgets than machine y . at these rates , if the two machines together produce 5 / 4 w widgets in 3 days , how many days would it take machine x alone to produce 5 w widgets ?
[ "4", "30", "8", "10" ]
B
"let y produce w widgets in y days hence , in 1 day y will produce w / y widgets . also , x will produce w widgets in y + 2 days ( given , x takes two more days ) hence , in 1 day x will produce w / y + 2 widgets . hence together x and y in 1 day will produce { w / y + w / y + 2 } widgets . together x and y in 3 days w...
sciq
sciq_01_05548
What do the cells in the front of a volvox typically develop to help swim towards light?
[ "eyespots", "sunspots", "vertebrates", "tumors" ]
A
Each Volvox , shown in Figure above , is a colonial organism. It is made up of between 1,000 to 3,000 photosynthetic algae that are grouped together into a hollow sphere. The sphere has a distinct front and back end. The cells have eyespots, which are more developed in the cells near the front. This enables the colony ...
medmcqa
medmcqa_05_03779
Final acceptor of electrons in ETC is:
[ "Cyt c", "Oxygen", "FADH2", "CoQ" ]
B
Ans. B. Oxygen(Ref: Harper 31/e page 123)Electrons are transferred in the ascending order of redox potential, the final oxygen electron acceptor is oxygen.
medmcqa
medmcqa_05_03144
Patients with hemophilia a have bleeding disorder because of -
[ "Lack of platelet aggregation", "Lack of reaction accelerator during activation of factor X in coagulation cascade", "Neutralization of antithrombin III", "Release of Thromboxane A2" ]
B
Ans. is 'b' i.e., Lack of reaction accelerator during activation of factor X in coagulation cascade
math_qa
mathqa_03_03424
a shopkeeper sold an article offering a discount of 5 % and earned a profit of 23.5 % . what would have been the percentage of profit earned if no discount had been offered ?
[ "28.5", "27.675", "30", "data inadequate" ]
C
"giving no discount to customer implies selling the product on printed price . suppose the cost price of the article is 100 . then printed price = 100 × ( 100 + 23.5 ) / ( 100 − 5 ) = 100 × 247 / 190 = 130 hence , required % profit = 130 – 100 = 30 % answer c"
medmcqa
medmcqa_05_00568
Charecteristic of smooth muscle cells in intestineMarch 2005
[ "Does not have actin and myosin", "Cannot do sustained contraction", "It contracts when stretched in the absence of any extrinsic innervation", "Does not require calcium for contraction" ]
C
Ans. C: It contracts when stretched in the absence of any extrinsic innervationUnitary smooth muscle (as present in a walls of a hollow viscus) is characterized by the instability of its membrane potential and by the fact that it shows continuous, irregular contractions that are independent of its nerve supply. This ma...
medmcqa
medmcqa_05_00233
Most common brain tumor in adults?
[ "Glioma", "Metastases", "Meningioma", "Astrocytoma" ]
B
Metastases is the most common type of brain tumor id adults. Most common primary for Metastases is lung.
medmcqa
medmcqa_05_04521
In a neuron, graded electrogenesis occurs at:
[ "Soma-dendritic zone", "Initial segment", "Axon", "Nerve ending" ]
A
Graded electrogenesis is local potential generation of which occurs in dendrite or, soma. Neurons generally have some important zones: A receptor, or dendritic zone, where multiple local potential generated by synaptic connections are integrated; A site where propagated action potentials are generated (the initial se...
medmcqa
medmcqa_05_02867
Type of wave in Metabolic Encephalopathy-
[ "Alpha", "Beta", "Gamma", "Delta" ]
D
Harrison's principles of internal medicine 17th edition. *The type of EEG in metabolic encephalopathy typically reveals generalized slowing.(Delta waves -slower than 4/s).
openbookqa
obqa_02_03016
Which can be used to create a prism?
[ "dried dung", "pine martens", "teak", "jello" ]
D
a prism refracts light
sciq
sciq_01_05424
At transform plate boundaries, two plates move in which directions?
[ "opposite", "same", "north and south", "parallel" ]
A
At transform plate boundaries, two plates move in opposite direction.
ARC-Challenge
arc_04_02825
Which set of descriptions correctly states the difference between a population and a community?
[ "Population: one species in an area Community: one species worldwide", "Population: organisms in a small area Community: organisms in a large area", "Population: living parts of an area Community: living and nonliving parts of an area", "Population: one type of organism in an area Community: many types of org...
D
null
medmcqa
medmcqa_05_02750
"Orphan Annie eye nuclei" is characteristic histologic feature of which of the following thyroid malignancy ?
[ "Papillary carcinoma of thyroid", "Medullary carcinoma of thyroid", "Anaplastic carcinoma of thyroid", "Follicular carcinoma of thyroid" ]
A
Orphan Annie nuclei is a characteristic intranuclear inclusion seen mainly in papillary carcinoma of thyroid. Ultrastructurally they are seen as membrane bound spheroidal masses of cytoplasm intruding into the nuclei. Intranuclear inclusions are less commonly seen in hyalinizing trabecular adenomas, medullary carcinoma...
sciq
sciq_01_02169
Rising air currents carry water vapor into what?
[ "stratosphere", "atmosphere", "ionosphere", "troposphere" ]
B
Rising air currents carry water vapor into the atmosphere. As the water vapor rises in the atmosphere, it cools and condenses. Condensation is the process in which water vapor changes to tiny droplets of liquid water. The water droplets may form clouds. If the droplets get big enough, they fall as precipitation —rain, ...
medmcqa
medmcqa_05_00446
Most common chromosomal anomoly in miscarriage
[ "Down's syndrome", "Turner's syndrome", "Trisomy 16", "Edward syndrome" ]
C
Most common Chromosomal anomoly in miscarriage Trisomy 16.
openbookqa
obqa_02_02717
What requires photosynthesis to grow?
[ "sunlight", "local flora", "power plants", "plant toys" ]
B
a plant requires photosynthesis to grow