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7.76k
sciq
sciq_01_02723
What are commonly used to control insect pests, but can have harmful effects on the environment?
[ "insecticides", "Herbicides", "toxins", "fertilizers" ]
A
Insecticides are commonly used to control insect pests, but they can have harmful effects on the environment.
math_qa
mathqa_03_02322
the vertex of a rectangle are ( 1 , 0 ) , ( 9 , 0 ) , ( 1 , 2 ) and ( 9 , 2 ) respectively . if line l passes through the origin and divided the rectangle into two identical quadrilaterals , what is the slope of line l ?
[ "5", "4", "1 / 2", "1 / 5" ]
D
if line l divides the rectangle into two identical quadrilaterals , then it must pass through the center ( 5 , 1 ) . the slope of a line passing through ( 0,0 ) and ( 5 , 1 ) is 1 / 5 . the answer is d .
sciq
sciq_01_08749
Most geological activity takes place where?
[ "ocean floor", "center of plates", "at plate boundaries", "high altitudes" ]
C
Most geological activity takes place at plate boundaries. But some activity does not. Much of this intraplate activity is found at hot spots. Hotspot volcanoes form as plumes of hot magma rise from deep in the mantle.
medmcqa
medmcqa_05_02270
Radiosensitive stage of cell cycle
[ "G2", "M", "S", "G1" ]
A
Radiation and cell cycle M phase followed by g2-m interphase is when the cell is radiosensitive. (g2m interphase > G2 > M) The cell is vulnerable to radiation in the stage of mitosis (m), less so during synthesis (s) and relatively insensitive during resting periods.Four impoant processes that occur after radiation exp...
sciq
sciq_01_07172
Creep, which usually takes place where the ground freezes and thaws frequently, involves movement of particles due to what force?
[ "gravity", "wind", "friction", "normal" ]
A
Creep usually takes place where the ground freezes and thaws frequently. Soil and rock particles are lifted up when the ground freezes. When the ground thaws, the particles settle down again. Each time they settle down, they move a tiny bit farther down the slope because of gravity.
sciq
sciq_01_04870
Which type of tides are created when the sun and moon's tides match?
[ "Neap tides", "weak tides", "low tides", "spring tides" ]
D
When the Sun's and Moon's tides match, there are spring tides. When the two tides are opposed, there are neap tides.
ARC-Easy
arc_04_01401
Which is a learned behavior?
[ "A dog uses its tongue to drink.", "A robin holds a branch with its feet.", "A chimpanzee digs for termites with a stick.", "A worm moves to the top of flooded ground." ]
C
null
sciq
sciq_01_03578
What is the name of the process in which solid food waste is passed out of the body?
[ "extinction", "regurgitation", "evaporation", "elimination" ]
D
Some substances in food cannot be broken down into nutrients. They remain behind in the digestive system after the nutrients are absorbed. Any substances in food that cannot be digested and absorbed pass out of the body as solid waste. The process of passing solid food waste out of the body is called elimination.
sciq
sciq_01_09713
What takes over the synthesis and secretion of progesterone throughout pregnancy as the corpus luteum degenerates?
[ "vagina", "ovaries", "placenta", "uterus" ]
C
The placenta takes over the synthesis and secretion of progesterone throughout pregnancy as the corpus luteum degenerates. Like estrogen, progesterone suppresses FSH and LH. It also inhibits uterine contractions, protecting the fetus from preterm birth. This hormone decreases in late gestation, allowing uterine contrac...
sciq
sciq_01_03825
What are the primary causes of bone fractures?
[ "sideways impact or bending", "spiral impact or bending", "step impact or bending", "overuse" ]
A
Each ionic compound has its own unique name that comes from the names of the ions.
openbookqa
obqa_02_02665
What requires nutrients to grow and heal?
[ "birds", "computers", "dirt", "metals" ]
A
an animal requires enough nutrients to maintain good health
math_qa
mathqa_03_03826
i bought two books ; for rs . 480 . i sold one at a loss of 15 % and other at a gain of 19 % and then i found each book was sold at the same price . find the cost of the book sold at a loss ?
[ "rs . 28", "rs . 280", "rs . 140", "rs . 70" ]
B
x * ( 85 / 100 ) = ( 480 - x ) 119 / 100 x = 280 answer : b
math_qa
mathqa_03_03919
if 20 % of 30 is greater than 25 % of a number by 2 , the number is :
[ "16", "24", "20", "32" ]
A
explanation : = > 20 / 100 * 30 - 25 / 100 * x = 2 = > x / 4 = 4 so x = 16 answer : a
openbookqa
obqa_02_02604
Which of these items contains a fat soluble vitamin?
[ "dog", "yogurt", "cat", "water" ]
B
dairy is a source of Vitamin D
ARC-Challenge
arc_04_02407
Bluebirds prefer to live near open, grassy places. Where would you most likely find a bluebird?
[ "a dam", "a beach", "a ball field", "a parking lot" ]
C
null
sciq
sciq_01_09556
What type of amplitudes and wavelengths avoid detection in deep water?
[ "high and long", "low and long", "low and wide", "high and wide" ]
B
An underwater earthquake creates a tsunami this way: The movement of the crust displaces water. The displacement forms a set of waves. The waves travel at jet speed through the ocean. Since the waves have low amplitudes and long wavelengths, they are unnoticed in deep water. As the waves reach shore they compress. They...
openbookqa
obqa_02_02570
If our globe is split in half, the innards would be
[ "stony", "ice", "hollow", "gold" ]
A
Earth 's surface is made of rock
sciq
sciq_01_03961
The community of all of the living and nonliving parts of an environment is known as what?
[ "habitat", "population", "ecosystem", "biodiversity" ]
C
math_qa
mathqa_03_03171
a train 300 meters long completely crosses a 300 meters long bridge in 45 seconds . what is the speed of the train is ?
[ "32", "48", "29", "27" ]
B
"s = ( 300 + 300 ) / 45 = 600 / 45 * 18 / 5 = 48 answer : b"
medmcqa
medmcqa_05_00404
DNA repair proofreading in prokaryotes are caused by
[ "DNA Polymerase I", "DNA Polymerase II", "DNA Polymerase III", "Gyrase" ]
B
The in vivo functionality of Pol II is under debate, yet consensus shows that Pol II is primarily involved as a backup enzyme in prokaryotic DNA replication.The enzyme has 5' - 3' DNA synthesis capability as well as 3' - 5' exonuclease proofreading activity.DNA Pol II interacts with multiple binding paners common with ...
sciq
sciq_01_11500
What causes the particles of medium to move parallel to the direction of the wave?
[ "longitudinal waves", "mechanical waves", "fluid waves", "Sound waves." ]
A
Longitudinal waves cause the particles of medium to move parallel to the direction of the wave.
openbookqa
obqa_02_04735
Poison causes harm to what things?
[ "vibrant", "mineral", "dead", "decaying" ]
A
poison causes harm to living things
openbookqa
obqa_02_03303
If a patch of land gets six inches of rainfall each month, then that is the amount of the
[ "storm", "quiet", "gathered moisture", "puddles" ]
C
rainfall is the amount of rain an area receives
sciq
sciq_01_01940
Lymph vessels, like veins, have what objects that prevent the backflow of fluid?
[ "pores", "fibers", "valves", "pumps" ]
C
sciq
sciq_01_10871
When magma heats groundwater, it may come to the surface as a hot spring or a what?
[ "volcano", "cave", "geyser", "pond" ]
C
When magma heats groundwater, it may come to the surface as a hot spring or a geyser.
sciq
sciq_01_08653
Androgen secretion and sperm production are both controlled by hypothalamic and which other hormones?
[ "Testes", "adrenal", "salivary", "pituitary" ]
D
sciq
sciq_01_00423
The process of the cytoplasm splitting apart and the cell pinching in two is known as what?
[ "electrolysis", "cytokinesis", "budding", "mitosis" ]
B
The cell wall grows toward the center of the cell. The cytoplasm splits apart, and the cell pinches in two. This is called cytokinesis .
math_qa
mathqa_03_03969
a scuba diver descends at a rate of 32 feet per minute . a diver dive from a ship to search for a lost ship at the depth of 6400 feet below the sea level . . how long will he take to reach the ship ?
[ "200 minutes", "240 minutes", "220 minutes", "210 minutes" ]
A
"time taken to reach = 6400 / 32 = 200 minutes answer : a"
math_qa
mathqa_03_04920
find the principle on a certain sum of money at 6 % per annum for 2 2 / 5 years if the amount being rs . 1120 ?
[ "979", "1288", "2778", "2682" ]
A
"1120 = p [ 1 + ( 6 * 12 / 5 ) / 100 ] p = 979 answer : a"
math_qa
mathqa_03_01376
in a college , 50 % of total 400 arts students are locals . 25 % of students from 100 science students are locals and 85 % of total 120 commerce students are locals . what is the total percentage of locals from arts , science and commerce .
[ "322", "340", "333", "327" ]
D
locals from arts = 50 % of 400 = 200 locals from science = 25 % of 100 = 25 locals from commerce = 85 % of 120 = 102 total locals = 200 + 25 + 102 = 327 d
openbookqa
obqa_02_03067
A scale can measure
[ "javascript", "intentions", "guitar picks", "thoughts" ]
C
a scale is used for measuring weight
sciq
sciq_01_03515
The relationships between groups of different species makes up a ___________.
[ "food chain", "community", "species", "family" ]
B
A community is made up of the relationships between groups of different species. For example, the desert communities consist of rabbits, coyotes, snakes, birds, mice and such plants as sahuaro cactus, ocotillo, and creosote bush. Community structure can be disturbed by such dynamics as fire, human activity, and over-po...
openbookqa
obqa_02_02632
Magnets in ear pieces convert sound waves into
[ "ear aches", "radio stations", "Brain cancer", "direct current" ]
D
telephones convert sound energy into electrical energy
openbookqa
obqa_02_04918
An example of seed dispersal is animals eating what?
[ "dirt", "hard shells", "grass", "animals" ]
B
An example of seed dispersal is animals eating seeds
sciq
sciq_01_09526
What enthalpy change is observed in an exothermic reaction?
[ "no change", "entropy", "negative", "positive" ]
C
The reaction is exothermic and thus the sign of the enthalpy change is negative.
openbookqa
obqa_02_02565
Moles are underground a lot of the time, and since few animals live there, they are unlikely to be
[ "dirty", "killed by others", "in dirt", "near worms" ]
B
living underground can be used for hiding from predators
sciq
sciq_01_05978
What type of scientist uses earth-orbiting telescopes?
[ "anthropologist", "biologist", "astrologer", "astronomer" ]
D
Astronomers use many tools to study things in space. Earth-orbiting telescopes view stars and galaxies from the darkness of space ( Figure below ). They may have optical and radio telescopes to see things that the human eye can't see. Spacecraft travel great distances to send back information on faraway places.
sciq
sciq_01_03014
What are 2 common growth patterns of population?
[ "exponential and economical", "organic and inorganic", "migratory and logistic", "exponential and logistic" ]
D
Populations may show different patterns of growth. The growth pattern depends partly on the conditions under which a population lives. Two common growth patterns are exponential growth and logistic growth. Both are represented in Figure below .
openbookqa
obqa_02_00428
An electric car causes
[ "more CO2 emissions", "equal CO2 emissions", "electric emissions", "less CO2 emmissions" ]
D
an electric car uses less gasoline than a regular car
openbookqa
obqa_02_04933
Animals are unable to grow or remain healthy without
[ "proper sustenance", "ice", "restaurants", "socks" ]
A
an animal requires nutrients to grow and heal
sciq
sciq_01_06842
What do many mollusks secrete for their protection?
[ "calcareous shell", "microscopic shell", "mucus", "sedimentation shell" ]
A
15.4 Mollusks and Annelids The phylum Mollusca is a large, mainly marine group of invertebrates. Mollusks show a variety of morphologies. Many mollusks secrete a calcareous shell for protection, but in other species, the shell is reduced or absent. Mollusks are protostomes. The dorsal epidermis in mollusks is modified ...
sciq
sciq_01_02197
What is the term for a mountain-building event?
[ "erosion", "orogeny", "volcanism", "glaciation" ]
B
A mountain-building event is called an orogeny . Orogenies take place over tens or hundreds of millions of years. Continents smash into each other. Microcontinents and island arcs smash into continents. All of these events cause mountains to rise.
sciq
sciq_01_04354
Mitochondria are thought to have evolved from what kind of cells?
[ "ancient matrix", "ancient prokaryotic", "ancient phosphorylation", "ancient ribosome" ]
B
Mitochondria are thought to have evolved from ancient prokaryotic cells.
medmcqa
medmcqa_05_04801
Closed bite is seen in which type of malocclusion?
[ "Class I", "Class II div I", "Class II div 2", "Class III" ]
C
The term ‘closed bite’ or ‘deep bite’ describes a condition of excessive overbite, where the vertical measurement between the maxillary and mandibular incisal margins is excessive when the mandible is brought into habitual or centric occlusion. It is the main finding of Class II div 2.  Key Concept: Deep bite may prese...
medmcqa
medmcqa_05_01621
A child is diagnosed to have tuberous sclerosis. Which of the following skin lesion is not associated?
[ "Ash leaf spot", "Shagreen patches", "Adenoma sebacium", "Xanthoderma" ]
D
(D) Xanthoderma # TUBEROUS SCLEROSIS is a genetic disorder affecting cellular differentiation and proliferation, which results in hamadoma formation in many organs (eg, skin, brain, eye, kidney, and heart).> Skin lesions (found in 70-80% of cases)> Characteristic lesions are angiofibromas, previously known by a misnome...
openbookqa
obqa_02_02986
When the Earth is tilted on its axis, as it always is, certain tilts will make it summer one once continent
[ "and birds fly around the moon", "and beans grow on the other side", "and another's celebrating Halloween", "and a desert on another" ]
C
the Earth being tilted on its axis causes ones side of the Earth to receive less energy from the Sun than the other side
openbookqa
obqa_02_04904
A frog would most likely eat
[ "a cockroach", "another frog", "a maple leaf", "a mouse" ]
A
a frog eats insects
sciq
sciq_01_04099
What is the source of most electricity?
[ "the Sun", "air", "coal", "methane" ]
C
Coal is the source of most electricity.
sciq
sciq_01_01425
Where does an object gain or lose it's energy to during travel through a potential difference?
[ "wave field", "electric field", "particle field", "magnetic field" ]
B
The energy that the object gains or loses when traveling through a potential difference is supplied (or absorbed) by the electric field --- there is nothing else there. Therefore, it follows that electric fields contain energy .
sciq
sciq_01_01104
A black solid by itself, this element is incredibly important because of what it makes when it combines with many other elements, including oxygen?
[ "lead", "dioxide", "hydrogen", "carbon" ]
D
Carbon is an element. By itself, it’s a black solid. You can see a lump of carbon in Figure below . Carbon is incredibly important because of what it makes when it combines with many other elements. Carbon can form a wide variety of substances. For example, in the air, carbon combines with oxygen to form the gas carbon...
sciq
sciq_01_05150
What is the name of the major sex hormone in females?
[ "estrogen", "glucose", "testosterone", "insulin" ]
A
Two functions of the female reproductive system are producing eggs and secreting estrogen. Eggs are female gametes. Estrogen is the major sex hormone in females. The female reproductive system also supports a developing fetus and gives birth to an infant.
math_qa
mathqa_03_03211
the length of a rectangular plot is thrice its breadth . if the area of the rectangular plot is 972 sq m , then what is the breadth of the rectangular plot ?
[ "16", "17", "18", "19" ]
C
"let the breadth of the plot be b m . length of the plot = 3 b m ( 3 b ) ( b ) = 972 3 b 2 = 972 b 2 = 324 b = 18 m . answer : option c"
math_qa
mathqa_03_03351
a doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 120 pounds . if the typical dosage is 2 cubic centimeters per 10 pounds of the body weight , by what percent was the prescribed dosage lesser than the typical dosage ?
[ "8 %", "- 37.5 %", "11 %", "12.5 %" ]
B
typical dosage per 10 pound of the body weight = 2 c . c typical dosage per 120 pound of the body weight = 2 * ( 120 / 10 ) = 2 * 12 = 24 c . c dosage prescribed by doctor for 120 pound patient = 18 c . c % prescribed dosage greater than the typical dosage = ( 18 - 24 / 16 ) * 100 % = ( - 6 / 16 ) * 100 % = - 37.5 % an...
openbookqa
obqa_02_04110
A thing that is weathered from a large item to tiny items has existed for an amount of time over between
[ "a week and a month", "a month and a decade", "a day and some weeks", "a minute and an hour" ]
B
weathering usually occurs over a period of many years
ARC-Challenge
arc_04_02930
Which statement best explains why a car that is rolling on a level surface will eventually come to a stop?
[ "Frictional forces oppose the motion of the car.", "Forward motion slowly runs out as energy is expended.", "The natural state of an object is to be at rest.", "Inertia acting on an object will dissipate." ]
A
null
sciq
sciq_01_02026
The bond between the two nitrogen atoms is a what?
[ "double bond", "triple bond", "quadruple bond", "single bond" ]
B
Solution 1. The bond between the two nitrogen atoms is a triple bond. The Lewis diagram for N2 is as follows:.
medmcqa
medmcqa_05_04847
Hypochloremia, hypokalemia and alkalosis are seen in
[ "Hirschsprung's disease", "Congenital hyperophic pyloric stenosis", "Esophageal atresia", "Jejunal atresia" ]
B
Biochemical abnormality in congenital hyperophic pyloric stenosis is a regular feature of AIIMS and AI examinations it has been repeated several times. The biochemical abnormalities seen are: Hypokalemia Hypochloremia Alkalosis and Paradoxical aciduria Ref : Schwaz 9/e p59
sciq
sciq_01_02627
The properties of liquids are intermediate between those of gases and solids but are more similar to?
[ "oils", "gases", "solids", "plasma" ]
C
The properties of liquids are intermediate between those of gases and solids but are more similar to solids. In contrast to intramolecular forces, such as the covalent bonds that hold atoms together in molecules and polyatomic ions, intermolecular forces hold molecules together in a liquid or solid. Intermolecular forc...
ARC-Easy
arc_04_01931
Earth is composed of layers of material with different properties. Which of the following is most likely to be in constant motion?
[ "core", "mantle", "oceanic crust", "continental crust" ]
B
null
medmcqa
medmcqa_05_03031
The enzyme deficient in erythropoietic porphyria is:
[ "PBG deaminase", "Uroporphyrin II cosynthetase", "Coprophyrin", "Ferrochelatase" ]
D
- Erythropoietic protoporphyria is due to deficiency of enzyme ferrochelataseQ.- All porphyrias are autosomal dominant (AD) except congenital erythropoietic porphyria (autosomal recessive, AR), ALA dehydratase (porphobilinogen) deficiency (AR) and X-linked protoporphyria (X-linked).
sciq
sciq_01_09164
What do we call structures that are similar in related organisms because they were inherited from a common ancestor?
[ "homologous", "filamentous", "monogamous", "polylogous" ]
A
Homologous structures are structures that are similar in related organisms because they were inherited from a common ancestor. These structures may or may not have the same function in the descendants. Figure below shows the hands of several different mammals. They all have the same basic pattern of bones. They inherit...
medmcqa
medmcqa_05_04721
Intravascular hemolysis is NOT associated with:
[ "Clostridium tetani", "Baonella bacilliformis", "Plasmodium falciparum", "Babesia microti" ]
A
Baonella bacilliformis, Plasmodium falciparum and Babesia microti infects RBC s and produces intravascular hemolysis. Clostridium tetani produces exotoxins which is responsible for the clinical manifestations and is not associated with hemolysis. Ref: Harrisons principles of internal medicine, 18th edition, Page: 1099.
medmcqa
medmcqa_05_02281
A 30 year old woman presents to a physician with rather non-specific complaints of fatigue, malaise, low-grade fever, and ahralgias. Screening serum chemistries demonstrate an elevated BUN. The urine shows proteinuria. Testing for which of the following will be most helpful for making the diagnosis?
[ "Anticentromeric antibody", "Antimitochondrial antibody", "Antinuclear antibody", "Anti-TSH receptor antibody" ]
C
Systemic lupus erythematosus is a orite on board examinations, and should be considered in any 15- to 45-year-old woman with chronic, poorly defined symptoms. Clues that help are malar rash, anti-double-stranded DNA antibodies, and renal involvement. Antinuclear antibody is a good screening test (it is also positive in...
medmcqa
medmcqa_05_02535
Which of the following anti-thyroid drugs are safe in pregnancy
[ "Carbimazole", "Iodine", "Propylthiouracil", "Methimazole" ]
C
PTU is safe after 1st trimester of pregnancy for hypehyroidism In 1st trimester -it causes liver damage in the fetus liver will develop by the end of 1st trimester so PTU can be given from 2nd trimester
math_qa
mathqa_03_02718
if p # q denotes the least common multiple of p and q , then t = ( ( 12 # 16 ) # ( 18 # 24 ) ) = ?
[ "216", "180", "144", "108" ]
C
"there are several ways to find the least common multiple of two numbers . in this case , the most efficient method is to use the greatest common factor : ( a * b ) / ( gcf ab ) = lcm ab the greatest common factor of 12 and 16 is 4 . so , 12 # 16 = 12 * 16 / 4 = 48 . the greatest common factor of 18 and 24 is 6 . so , ...
math_qa
mathqa_03_00385
a number when divided by 45 , gives 30 as quotient and 0 as remainder . what will be the remainder when dividing the same number by 15
[ "a", "b", "c", "d" ]
A
explanation : p ÷ 45 = 30 = > p = 30 * 45 = 1350 p / 15 = 1350 / 15 = 90 , remainder = 0 answer : option a
openbookqa
obqa_02_01537
Which animal eats prey?
[ "beetle", "horse", "rabbit", "buffalo" ]
A
predators eat prey
medmcqa
medmcqa_05_01867
Number of RBC excreted per day in urine is
[ "1 million", "2 million", "3 million", "4 million" ]
A
(A) 1 million# Microscopic Heamaturia: A few RBC can be found in urine of normal people. The upper limit of normal for RBC excretion is 1 million per 24 hours> Transient microscopic heamaturia can occur following rigorous exercise , sexual inter course , or from menstrual contamination
sciq
sciq_01_03180
What weakly scatters visible light?
[ "air", "Reflection", "space", "water" ]
A
The color of a material is due to the ability of its atoms to absorb certain wavelengths while reflecting or reemitting others. A simple red material, for example a tomato, absorbs all visible wavelengths except red. This is because the atoms of its hydrocarbon pigment (lycopene) have levels separated by a variety of e...
medmcqa
medmcqa_05_02650
Fractional excretion of sodium < 1 is seen in
[ "Pre renal azotemia", "Acute tubular necrosis", "Acute ureteral obstruction", "Interstitial nephritis" ]
A
Ans. is 'a' i.e., Pre renal azotemia * Urine Diagnostic Indices in differentiation of prerenal Vs Intrinsic Renal FailureDiagnostic IndexPrerenalARFIntrinsic Renal ARF* Fractional Excretion of Na<1> 1* Urine Sodium Concentration (mmol/L)<10>20* Urine Creatinine to Plasma Creatinine ratio>40<20* Urine osmolality (mosmol...
openbookqa
obqa_02_03821
Which object would have more tightly packed matter
[ "gold", "gas", "wood", "water" ]
A
an organism is a source of organic matter
sciq
sciq_01_04710
Some terrestrial species breathe through their skin and oral cavity because they lack what?
[ "nose", "windpipe", "mouth", "lungs" ]
D
openbookqa
obqa_02_02567
A bird that finds itself endangered is
[ "sees others of its species in large amounts", "friendly with many other birds", "glad to have so much company", "unlikely to meet more of its type" ]
D
endangered means low in population
openbookqa
obqa_02_03949
the cells of golden retrievers can
[ "spontaneously combust", "change colors", "liquify", "specialize" ]
D
the cells of multicellular organisms can specialize
sciq
sciq_01_10157
What part of the plant, in general, is responsible for transport and storage of water and minerals?
[ "pistil", "leaves", "petals", "stems" ]
D
Stems are needed for transport and storage. Their vascular tissue carries water and minerals from roots to leaves. It carries dissolved sugar from the leaves to the rest of the plant. Without this connection between roots and leaves, plants could not survive high above the ground in the air. In many plants, ground tiss...
ARC-Easy
arc_04_01152
A scientist was examining a large boulder that was covered with lichens (a combination of fungi and algae). He chipped a piece of the rock and placed it under a microscope. He observed that the surface of the rock was breaking down underneath the lichen. Which was the scientist most likely observing?
[ "the interaction between abiotic factors", "the effects of chemical weathering", "the process of deposition", "the effects of abrasion" ]
B
null
sciq
sciq_01_10616
What helps sound travel in waves?
[ "speaker placements", "temperatures", "gases", "molecules" ]
C
Sound is a form of energy that travels in waves. Sound waves cannot travel through empty space, but they can travel through gases. Gases in the air allow us to hear most of the sounds in our world. Because of air, you can hear birds singing, horns tooting, and friends laughing. Without the atmosphere, the world would b...
sciq
sciq_01_08803
Where in the lungs does gas exchange between the air and blood takes place?
[ "left lobe", "alveoli", "bronchial tube", "ganglion" ]
B
The alveoli in the lungs are where gas exchange between the air and blood takes place. Each alveolus is surrounded by a network of capillaries. When you inhale, air in the alveoli has a greater concentration of oxygen than does blood in the capillaries. The difference in oxygen concentration causes oxygen to diffuse fr...
openbookqa
obqa_02_03288
If you are stuck in the desert and need your water to last you, it is best to
[ "throw it away", "hit it", "safeguard it", "sell it" ]
C
conserving water can be used for survival in a dry environment
math_qa
mathqa_03_01923
a pipe can empty 3 / 4 th of a cistern in 12 mins . in 8 mins , what part of the cistern will be empty ?
[ "1 / 2", "3 / 7", "4 / 9", "3 / 8" ]
A
3 / 4 - - - - 12 ? - - - - - 8 = = > 1 / 2 a
medmcqa
medmcqa_05_00750
A 23 year old patient had fever since 2 weeks presents with mitral valve vegetation. Patient is a intravenous drug abuser. Most common cause of endocarditis in this patient is :
[ "S.aureus", "S.epidermidis", "Enterococcus", "Viridans Streptococci" ]
C
i.v. drug abusers Lt. sided endocarditis – Enterococcus Rt. sided endocarditis – S.aureus
sciq
sciq_01_00898
The group 18 gases that have 8 valence electrons are referred to as what type of gases?
[ "important", "metal", "novel", "noble" ]
D
A common way to keep track of valence electrons is with Lewis electron dot structures . In an electron dot structure, each atom is represented by its chemical symbol, and each valence electron is represented by a single dot. Note that only valence electrons are shown explicitly in these diagrams. For the main group ele...
math_qa
mathqa_03_01113
a boy goes to his school from his house at a speed of 3 km / hr and returns at a speed of 2 km / hr . if he takes 5 hours in going and coming . the distance between his house and school is ?
[ "3", "4", "6", "5" ]
C
"average speed = ( 2 * 3 * 2 ) / ( 3 + 2 ) = 12 / 5 km / hr . distance traveled = 12 / 5 * 5 = 12 km . distance between house and school = 12 / 2 = 6 km . answer : c"
medmcqa
medmcqa_05_02210
Which off the following is an oncogenic retrovirus?
[ "HTLV-1", "HPV", "EBV", "HBV" ]
A
Ans: A (HTLV-1) Ref: Jawetz, Mel nick & Adel bergs Textbook of Medical Microbiology, 25th Edition. 2010Explanation:* Viruses which produce tumors in either their natural host or experimental animals or induce malignant transformation in cell cultures are called oncogenic viruses.RNA virusesCANCERHCVHTLV1HIVHepatocellul...
sciq
sciq_01_00784
What side of a mountain does the rainshadow effect occur on?
[ "starboard", "windward", "the leeward side", "due north" ]
C
Rainshadow effect occurs on the leeward side of a mountain range.
medmcqa
medmcqa_05_03831
Which of the following is not an established antimicrobial drug synergism at clinical level?
[ "Amphotericin B and flucytosine in cryptococcal meningitis", "Carbenicillin and gentamicin in pseudomonal infections", "Penicillin and tetracycline in bacterial meningitis", "Trimethoprim and sulfamethoxazole in coliform infections" ]
C
Combination of a bacteriostatic and a bactericidal drug in most cases is antagonistic. Bactericidal drugs act on fast multiplying organisms whereas bacteriostatic drugs inhibit the growth. Here, penicillins are bactericidal whereas tetracyclines are bacteriostatic.
sciq
sciq_01_07506
What important process takes place in specialized tissue inside plant leaves?
[ "reproduction", "mitosis", "photosynthesis", "pollination" ]
C
specialized tissue inside plant leaves where photosynthesis takes place.
ARC-Easy
arc_04_00463
Which is a nonrenewable natural resource that is used to make electrical energy?
[ "coal", "wind", "water", "thermal" ]
A
null
medmcqa
medmcqa_05_02951
In Weber's syndrome there is:
[ "3rd nerve palsy", "4th nerve palsy", "5th nerve", "7th nerve" ]
A
Ans. 3rd nerve palsy
sciq
sciq_01_10093
Growth and development in humans is most rapid during what two stages?
[ "infancy and adolescence", "teen and adults", "flutter and adolescence", "bounce and adolescence" ]
A
Growth and development are most rapid during infancy and slower throughout the rest of childhood until adolescence.
openbookqa
obqa_02_02469
Which animal will hide the best when seeking food
[ "rabbit", "chameleon", "cat", "spider" ]
B
camouflage can be used for hunting for food
medmcqa
medmcqa_05_01751
Muehrcke lines in nails are seen in
[ "Nephrotic syndrome", "Barer syndrome", "Nail patella syndrome", "Acute tubular necrosis" ]
A
Ans. is 'a' i.e., Nephrotic syndrome
medmcqa
medmcqa_05_03181
Mitochondrial DNA is
[ "Closed circular", "Nicked circular", "Linear", "Open circular" ]
A
Mitochondrial DNA (mtDNA or mDNA) is the DNA located in mitochondria, cellular organelles within eukaryotic cells that conve chemical energy from food into a form that cells can use, adenosine triphosphate (ATP). Ref-Harpers illustrated biochemistry 30/e p585
sciq
sciq_01_01988
What is each half of the cerebrum called?
[ "demisphere", "a describe", "a biplane", "a hemisphere" ]
D
The cerebrum is divided into a right and left half ( Figure above ). Each half of the cerebrum is called a hemisphere. The two hemispheres are connected by a thick bundle of axons called the corpus callosum . It lies deep inside the brain and carries messages back and forth between the two hemispheres.
ARC-Challenge
arc_04_02397
Students dropped different rocks into sand to simulate meteorite impacts. Their goal was to determine which rock made the deepest crater. Which variable should the students control in order to have the most accurate results?
[ "the height from which the rocks are dropped", "the average time it takes the rocks to fall", "the density of the rocks", "the mass of the rocks" ]
A
null
sciq
sciq_01_03360
When gas particles heat up and gain energy, what do they do?
[ "stop", "move slower", "move faster", "go up" ]
C
When gas particles heat up and gain energy, they move faster. This increases their collisions with each other and their container, causing greater pressure.
medmcqa
medmcqa_05_00806
An Organized collection of the values of the various variables which will be used for fuher analysis in an epidemiological study is known as
[ "Data set", "Sample", "Statistics", "Population" ]
A
Data consists of discrete observations of attributes or events. They carry little meaning when considered alone; Data needs to be transformed into information by reducing them, summarizing them and adjusting them for variations Information is transferred to intelligence through integration and processing with experienc...
sciq
sciq_01_03406
What is the bending of waves around a corner called?
[ "propulsion", "reflection", "absorption", "diffraction" ]
D
Diffraction is the bending of waves around a corner.
math_qa
mathqa_03_03263
4 dice are thrown simultaneously on the board . find the probability show the same face .
[ "1 / 213", "1 / 215", "1 / 216", "2 / 113" ]
C
"the total number of elementary events associated to the random experiments of throwing four dice simultaneously is : = 6 × 6 × 6 × 6 = 64 = 6 × 6 × 6 × 6 = 64 n ( s ) = 64 n ( s ) = 64 let xx be the event that all dice show the same face . x = { ( 1,1 , 1,1 , ) , ( 2,2 , 2,2 ) , ( 3,3 , 3,3 ) , ( 4,4 , 4,4 ) , ( 5,5 ,...
openbookqa
obqa_02_04272
Avoiding fossil fuel usage is an example of what?
[ "keeping natural", "destroying", "eliminating", "burning" ]
A
An example of conservation is not using fossil fuel