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medmcqa
medmcqa_05_02589
Sudha, a lot 20 year old female developed antibiotic associated pseudomembranous colotis caused by Costridium difficile. Whinch of the following drugs is most likely to be effective in the treatment of this disease?
[ "Ampicillin", "Clindamycin", "Metronidazole", "Chloramphenicol" ]
C
(Ref: KDT 6/e p791) Drugs used for the treatment of psudoembranours colitis are Metronidzole (Drug of choice) Vancomycin
sciq
sciq_01_10590
Terrestrial arthropods generally have internal surfaces specialized for what?
[ "gas exchange", "water uptake", "protection", "food gathering" ]
A
sciq
sciq_01_08306
The size and symmetry of a beetle’s or an elk’s antlers or a grasshopper’s song communicate rather clearly their state of what?
[ "need", "society", "problem", "health" ]
D
transient males. Since these loyal males already bond and cooperate with females, it may well be a simple matter for them to bond and cooperate with each other. In a semi-counter intuitive manner, the ability to bond with males could be selected for based on its effect on reproductive success with females. On the other...
sciq
sciq_01_00031
In order to create food, what do photosynthetic protists use?
[ "light energy", "thermal energy", "decayed matter", "hydrocarbons" ]
A
Photosynthetic protists use light energy to make food. They are major producers in aquatic ecosystems.
sciq
sciq_01_02292
What is the purpose of utilizing careful farming practices such as rotating crops or planting nutrient rich crops?
[ "improve soil quality", "improve sediment quality", "improve soil texture", "improve photosynthesis quality" ]
A
Careful farming helps to keep up soil quality each season. One way is to plant different crops each year. Another is to alternate the crops planted in each row of the field. These techniques preserve and replenish soil nutrients. Planting nutrient rich cover crops helps the soil. Planting trees as windbreaks, plowing a...
sciq
sciq_01_00879
What type of generations do plants alternate between during a life cycle?
[ "vitro and diploid", "haploid and clump", "algal and diploid", "haploid and diploid" ]
D
All plants have a life cycle that alternates between haploid and diploid generations. Plants vary in terms of which generation is dominant. Most modern plants have a dominant diploid generation.
sciq
sciq_01_00148
All forms of energy can be interconverted. three things can change the energy of an object: the transfer of heat, work performed on or by an object, or some combination of what?
[ "cold and energy", "humidity and work", "heat and work", "temperature and work" ]
C
All forms of energy can be interconverted. Three things can change the energy of an object: the transfer of heat, work performed on or by an object, or some combination of heat and work.
sciq
sciq_01_00739
What do angiosperms produce?
[ "scales", "flowers and fruit", "leaves", "needles" ]
B
a phosphate group, which contains phosphorus and oxygen.
sciq
sciq_01_00602
The best thermal conductors are also the best conductors of what, which is also related to the density of free electrons in them?
[ "pollution", "electricity", "sound", "light" ]
B
Note that in Table 14.3, the best thermal conductors—silver, copper, gold, and aluminum—are also the best electrical conductors, again related to the density of free electrons in them. Cooking utensils are typically made from good conductors.
sciq
sciq_01_01026
Boiling points increase with which kind of mass?
[ "universal mass", "protons mass", "molar mass", "lipid mass" ]
C
Carboxylic acids have high boiling points compared to other substances of comparable molar mass. Boiling points increase with molar mass.
sciq
sciq_01_08483
What larger theory is einstein's equation part of?
[ "cycle of relativity", "excess of relativity", "theory of relativity", "law of relativity" ]
C
Einstein’s equation is part of a larger theory called the theory of relativity. It is concerned with concepts such as motion and forces as well as mass and energy. Motion and forces are the focus of succeeding chapters.
ARC-Challenge
arc_04_02848
If a fox and an eagle eat some of the same organisms in an ecosystem, the relationship between the fox and the eagle could be classified as
[ "competition.", "mutualism.", "predation.", "parasitism." ]
A
null
ARC-Easy
arc_04_01145
Which of the following is one reason that quartz is classified as a mineral?
[ "It can be manufactured.", "It comes in different colors.", "It has a specific crystal structure.", "It can be melted at high temperatures." ]
C
null
math_qa
mathqa_03_00309
if 4 : 6 : : x : 36 , then find the value of x
[ "24", "22", "28", "30" ]
A
explanation : treat 4 : 6 as 4 / 6 and x : 36 as x / 36 , treat : : as = so we get 4 / 6 = x / 36 = > 6 x = 144 = > x = 24 option a
medmcqa
medmcqa_05_01295
Hydatid cyst is caused by?
[ "Trypanosoma cruzi", "Taenia solium", "Taenia saginata", "Echinococcus granulosus" ]
D
Hydatid disease Caused by ingestion of eggs of echinococcal species. Definitive host is the dog Intermediate hosts are sheep
sciq
sciq_01_09391
Why do crystals have relatively sharp and well-defined melting points?
[ "uniform intermolecular forces", "variable intermolecular forces", "particular intermolecular forces", "angular intermolecular forces" ]
A
Deformation of the ionic crystal causes one plane of atoms to slide along another. The resulting repulsive interactions between ions with like charges cause the layers to separate. Crystals tend to have relatively sharp, well-defined melting points because all the component atoms, molecules, or ions are the same distan...
sciq
sciq_01_04290
What keeps various species from mating and reproducing outside their own species?
[ "brain organ incompatibility", "digestive system incompatibility", "reproductive organ incompatibility", "cancer organ incompatibility" ]
C
Figure 18.19 The shape of the male reproductive organ varies among male damselfly species, and is only compatible with the female of that species. Reproductive organ incompatibility keeps the species reproductively isolated.
openbookqa
obqa_02_04533
A creature of a certain age lays a clutch, so it is probably a
[ "deer", "hare", "falcon", "bear" ]
C
some adult animals lay eggs
ARC-Easy
arc_04_02130
Certain flowers will open for twelve hours and then close. Which stimulus do the flowers respond to when they open and then when they close for that time period?
[ "light levels", "moon phases", "seasonal temperatures", "carbon dioxide levels" ]
A
null
medmcqa
medmcqa_05_00169
Commonest cause of loss of vision in non- proliferative diabetic retinopathy is –
[ "Vitreous heamorrhage", "Macular edema", "Detachment of retina", "Subretinal haemorrhage" ]
B
Macular edema is the most common cause of loss of vision in NPDR.
math_qa
mathqa_03_03828
sheela deposits rs . 4500 in bank savings account . if this is 28 % of her monthly income . what is her monthly income in ?
[ "22000", "27000", "16071", "16789" ]
C
"explanation : 28 % of income = rs . 4500 100 % of income = 4500 x 100 / 28 = rs . 16071 answer : c"
sciq
sciq_01_01360
Migration and hibernation are examples of behaviors that occur on what temporal basis?
[ "weekly", "nocturnal", "daily", "annual" ]
D
Many animal behaviors occur in repeated cycles. Migration and hibernation are examples of behaviors with annual cycles. Sleeping and waking are examples of behaviors with daily cycles.
ARC-Challenge
arc_04_02781
The temperature at which water freezes enables water to exist in which two forms on Earth?
[ "freshwater rivers and saltwater oceans", "liquid oceans and solid glaciers", "atmospheric vapor and cloud droplets", "water in soil and water in plants" ]
B
null
openbookqa
obqa_02_01234
What kind of organisms decay?
[ "harvested turnips", "alive humans", "sleeping dogs", "hibernating bears" ]
A
dead organisms decay
ARC-Challenge
arc_04_03169
Which characteristic of a bird most likely aids in obtaining food found in small places?
[ "webbed feet", "large body", "soft feathers", "skinny beak" ]
D
null
medmcqa
medmcqa_05_00711
Intracranial calcification with cystic lesion in plain X-Ray skull is seen in
[ "Meningioma", "Glioma", "Craniopharyngioma", "Meduloblastoma" ]
C
C i.e. Craniopharyngioma - Most common cause of intra cranial calcification = Pineal body calcificationQ - Most common calcifying brain tumor in child = CraniopharyngiomaQ > Oligodendroglioma - Craniopharyngioma causes characteristic suprasellar calcification with cystic appearanceQ - Craniopharyngioma arises from remn...
sciq
sciq_01_06641
Momentum is a vector quantity that has the same direction as what?
[ "inertia", "object energy", "object ' s velocity", "initial speed" ]
C
Momentum is a vector quantity that has the same direction as the velocity of the object.
ARC-Easy
arc_04_01719
A student heated a pan of soup on a stove. While stirring the soup with a metal spoon, the student noticed the spoon became very warm. What is the most likely reason the spoon became warm?
[ "The stirring action heated the spoon.", "Warm air in the room heated the spoon.", "Heat from the soup was transferred to the spoon.", "The student's hand transferred heat to the spoon." ]
C
null
openbookqa
obqa_02_02557
What will increase as the animal eats more food?
[ "starvation", "trees", "belly size", "hunger" ]
C
as the amount of food an animal eats increases , the weight of that animal will increase
sciq
sciq_01_02312
What branch of science offers an overview of the physiology of humans?
[ "geology", "marine biology", "engineer", "human biology" ]
D
Human Biology provides an overview of the physiology of humans, from the skin inward. In addition to the skin, the skeletal, muscular, nervous, circulatory, respiratory, digestive, excretory, immune, and reproductive systems are described.
sciq
sciq_01_09586
When cardiac muscle contracts, the heart does what?
[ "irregular heartbeat", "pumps blood", "cardiac arrest", "heart murmur" ]
B
Cardiac muscle is found only in the walls of the heart. It is striated, or striped, because its muscle fibers are arranged in bundles. Contractions of cardiac muscle are involuntary. This means that they are not under conscious control. When cardiac muscle contracts, the heart beats and pumps blood.
sciq
sciq_01_01698
Filter feeders, such as sponges, pump water into their body through what structures?
[ "lungs", "pores", "valves", "fibers" ]
B
Sponges are filter feeders. They pump water into their body through their pores. The water flows through a large central cavity called the spongocoel (see Figure above ). As the water flows by, specialized collar cells filter out food particles such as bacteria. Collar cells have tiny hairs that trap the particles. The...
medmcqa
medmcqa_05_04707
Supero-lateral boundary of axillary dissection is?
[ "Clavi-pectoral fascia", "Brachial plexus", "Axillary artery", "Axillary vein" ]
D
ANSWER: (D) Axillary veinREF: Grays anatomy, 39th edition, page 841Also see Anatomy Q1 Dec 2010"Axillary node clearance can be defined as clearing the axillary contents bounded by the axillary skin laterally, latissimus dorsi, teres major and subscapularis posteriorly, the lower border of the axillary vein superiorly, ...
openbookqa
obqa_02_01180
The Appalachians reach amazing heights because of how stone
[ "blew up", "piles together", "melted lava", "created anchors" ]
B
the Appalachians were formed by rock folding
sciq
sciq_01_11023
By what kind of change can a chemical change be reversed?
[ "another thermal change", "another carbon change", "another radioactive change", "another chemical change" ]
D
Because chemical changes result in different substances, they often cannot be undone. Some chemical changes can be reversed, but only by other chemical changes.
sciq
sciq_01_04794
Water moving up the plane and evaporating from the leaves is a process known as what?
[ "transpiration", "propagation", "evaporation", "sublimation" ]
A
Water also moves through the living organisms in an ecosystem. Plants soak up large amounts of water through their roots. The water then moves up the plant and evaporates from the leaves in a process called transpiration . The process of transpiration, like evaporation, returns water back into the atmosphere.
math_qa
mathqa_03_02990
a car traveled from san diego to san francisco at an average speed of 63 miles per hour . if the journey back took twice as long , what was the average speed of the trip ?
[ "24 .", "32 .", "36 .", "42 ." ]
D
"let the time taken be = x one way distance = 63 x total distance traveled = 2 * 63 x = 126 x total time taken = x + 2 x = 3 x average speed = 126 x / 3 x = 42 answer : d"
openbookqa
obqa_02_02929
What statement is true?
[ "whales need oxygen", "whales need fishing", "whales need mercury", "whales need boats" ]
A
an animal requires oxygen for to breathe
math_qa
mathqa_03_04405
90 is increased by 50 % . find the final number .
[ "100", "110", "135", "140" ]
C
"final number = initial number + 50 % ( original number ) = 90 + 50 % ( 90 ) = 90 + 45 = 135 . answer c"
openbookqa
obqa_02_03476
One way to encourage seeds to grow might be
[ "throwing the seeds away", "telling the plants to grow up", "using a table lamp", "mowing down the grass to nothingness" ]
C
seeds may sprout when buried in soil
math_qa
mathqa_03_01375
the cost price of 7 articles is equal to the selling price of 5 articles . what is the profit percent ?
[ "10 %", "20 %", "30 %", "40 %" ]
D
"5 * sp = 7 * cp sp = 1.4 * cp the profit percent is 40 % . the answer is d ."
math_qa
mathqa_03_00665
if | 5 x - 30 | = 100 , then find the sum of the values of x ?
[ "1", "- 2", "12", "- 3" ]
C
"| 5 x - 30 | = 100 5 x - 30 = 100 or 5 x - 30 = - 100 5 x = 130 or 5 x = - 70 x = 26 or x = - 14 sum = 26 - 14 = 12 answer is c"
ARC-Easy
arc_04_00126
The Sun appears to move across the sky each day, rising in the east and setting in the west. What causes this apparent motion?
[ "the rotation of Earth on its axis", "the revolution of the Sun around Earth", "the Earth’s distance from the Sun", "the properties of Earth’s atmosphere" ]
A
null
ARC-Challenge
arc_04_02186
Which is a nonrenewable resource?
[ "oil", "trees", "solar energy", "food crops" ]
A
null
openbookqa
obqa_02_01865
A full moon is visible
[ "bimonthly", "biweekly", "every two months", "every four weeks" ]
D
each of the moon 's phases usually occurs once per month
sciq
sciq_01_07865
What is the most abundant element in the universe?
[ "nitrogen", "helium", "carbon", "hydrogen" ]
D
Isotopes of Hydrogen Hydrogen, the most abundant element in the universe, is the ultimate source of all other elements by the process of nuclear fusion. (For more information on nuclear fusion, seeChapter 20 "Nuclear Chemistry". ) Table 21.2 "The Isotopes of Hydrogen" compares the three isotopes of hydrogen, all of whi...
openbookqa
obqa_02_01082
What might happen if too much heat is transferred to an object?
[ "freezing", "solidifying", "burning", "moving" ]
C
if too much heat is transferred to an object then that object may burn
openbookqa
obqa_02_03696
Why do companies heat up milk before they bottle it?
[ "the milk is probably sour", "it tastes bad that way", "small organisms could make you sick", "the cow could get angry" ]
C
pasteurization reduces the amount of bacteria in milk
sciq
sciq_01_02132
Vertebrates. from the smallest of fish to us. one of the main features we all have in common is our what?
[ "warm blood", "hair", "backbone", "laying eggs" ]
C
Vertebrates. From the smallest of fish to us. One of the main features we all have in common is our backbone. Vertebrates describes main biological features of fish, amphibians, reptiles, birds, and mammals.
sciq
sciq_01_07141
What is the term for individuals of a species that live in a particular habitat?
[ "biosphere", "population", "family", "ecosystem" ]
B
CHAPTER SUMMARY 45.1 Population Demography Populations are individuals of a species that live in a particular habitat. Ecologists measure characteristics of populations: size, density, dispersion pattern, age structure, and sex ratio. Life tables are useful to calculate life expectancies of individual population member...
math_qa
mathqa_03_03960
the charge for a single room at hotel p is 40 percent less than the charge for a single room at hotel r and 10 percent less than the charge for a single room at hotel g . the charge for a single room at hotel r is what percent greater than the charge for a single room at hotel g ?
[ "15 %", "20 %", "40 %", "50 %" ]
D
"p = 0.6 r = 0.9 g r = 0.9 g / 0.6 = 1.5 * g thus r is 50 % greater than g . the answer is d ."
math_qa
mathqa_03_04235
the population of bacteria culture doubles every 2 minutes . approximately how many minutes will it take for the population to grow from 1000 to 500000 bacteria ?
[ "10", "12", "14", "18" ]
D
2000 ^ 12000 ^ 22000 ^ 32000 ^ 4 . . . . . . . 2000 ^ 9 population increases in this sequence taking 9 * 2 = 18 answer : d
sciq
sciq_01_07039
Why must values of specific heat be looked up in tables?
[ "difficult to understand", "difficult to memorize", "lack of formulas", "difficult to calculate" ]
D
Values of specific heat must generally be looked up in tables, because there is no simple way to calculate them. In general, the specific heat also depends on the temperature. Table 14.1 lists representative values of specific heat for various substances. Except for gases, the temperature and volume dependence of the s...
medmcqa
medmcqa_05_01734
The time interval between diagnosid by early detection of screening and diagnosis by other means is -
[ "Serial interval", "Lead time", "Time lag", "Latent period" ]
B
.lead time is the advantage gained by screening.that is the period between diagnosis by early detection and diagnosis by other means.the benefits are alwaysd evaluated in terms of outcomes..lead time is the advantage gained by screening.that is the period between diagnosis by early detection and diagnosis by other mean...
sciq
sciq_01_00793
A chemical property describes the ability of a substance to undergo a specific what?
[ "chemical change", "weight Change", "liquid change", "radiation change" ]
A
A chemical property describes the ability of a substance to undergo a specific chemical change. A chemical property of iron is that it is capable of combining with oxygen to form iron oxide, the chemical name of rust. The more general term for rusting and other similar processes is corrosion. Other terms that are commo...
math_qa
mathqa_03_01839
the proportion of water to alcohol in solution a is 2 : 1 and the proportion of water to alcohol in solution b is 2 : 3 . if an equal amount of each solution is mixed together , what is the concentration of alcohol in the new solution ?
[ "46.7 %", "47.3 %", "48.4 %", "50.6 %" ]
A
"let v be the total volume of the new solution . then a volume of v / 2 was added from each solution a and b . the amount of alcohol added to the new solution was : ( 1 / 3 ) ( v / 2 ) + ( 3 / 5 ) ( v / 2 ) = v / 6 + 3 v / 10 = 14 v / 30 = 7 v / 15 . the concentration of alcohol is 7 / 15 = 46.7 % the answer is a ."
medmcqa
medmcqa_05_00240
Statutory body (shown in symbol) has been established under the act passed in
[ "2000", "2002", "2006", "2013" ]
C
2006
medmcqa
medmcqa_05_01103
Which of the following structure is known as the centre for 'sleep switch'?
[ "Suprachiasmatic nucleus", "Ventro lateral preoptic area", "Neo coex", "Nucleus of tractus solitarius" ]
B
Ventro lateral preoptic area in anterior hypothalamus plays a key role in regulation of sleep. It acts as a sleep generating nucleus thus it serves as a centre for sleep switch. Suprachiasmatic nucleus is responsible for the circadian rhythm. Ref: Ganong's Review of Medical Physiology, 23rd Edition, Page 236
sciq
sciq_01_10213
What corrosive substances capable of dissolving many metals can cause contamination if spilled?
[ "acids", "ions", "salts", "bases" ]
A
Acids can dissolve many metals; a spilled acid can lead to contamination.
openbookqa
obqa_02_01371
What animal is cold-blooded?
[ "cats", "dogs", "tree hopper", "rats" ]
C
an amphibian is cold-blooded
sciq
sciq_01_05268
What is the only way to completely avoid stis?
[ "cover your mouth", "avoid sexual contact", "oral sex", "contraceptive use" ]
B
The only completely effective way to prevent infection with STIs is to avoid sexual contact and other risky behaviors. Using condoms can lower the risk of becoming infected with STIs during some types of sexual activity. However, condoms are not foolproof. Pathogens may be present on areas of the body not covered by co...
ARC-Challenge
arc_04_02951
A city wants to build a dam nearby to increase water supplies. Which question is most important to ask about the environmental effects of building the dam?
[ "How long will it take to build?", "How much concrete is needed?", "How will the lake be used for recreation?", "How will the dam affect fish populations?" ]
D
null
ARC-Easy
arc_04_01910
The temperature in a hot star is high enough to pull electrons away from atoms. What state of matter results from this process?
[ "gas", "solid", "liquid", "plasma" ]
D
null
openbookqa
obqa_02_02394
A deer eats plants, which are producers, and they also
[ "eat marshmallows", "burn bridges", "eat cats", "create sugars" ]
D
a producer is a source of sugar in an ecosystem
ARC-Challenge
arc_04_02885
If a child scrapes his foot on a piece of rusty metal, it is important to get medical treatment because the
[ "metal is corrosive to the skin.", "foot carries large amounts of bacteria.", "foot is the most sensitive part of the body.", "metal may be contaminated and cause infection." ]
D
null
sciq
sciq_01_01269
What structure consists of an outer layer of cells called the trophoblast and an inner cell mass called the embryoblast?
[ "blastocyst", "cell wall", "cytoplasm", "nucleus" ]
A
Blastocyst. The blastocyst consists of an outer layer of cells called the trophoblast and an inner cell mass called the embryoblast. The blastocyst fluid-filled cavity is also known as the blastocoel or blastocoele.
ARC-Easy
arc_04_00312
What is the highest temperature that water can reach in a pot on a stove?
[ "50°C", "90°C", "100°C", "212°C" ]
C
null
ARC-Easy
arc_04_01301
Solar radiation is a combination of light with different wavelengths. Which type of ray can harm human skin the most?
[ "infrared", "microwave", "ultraviolet", "visible" ]
C
null
sciq
sciq_01_07968
The hydroxyl radical is highly reactive because it has what?
[ "unpaired electron", "unpaired neutron", "paired proton", "paired electron" ]
A
Because the hydroxyl radical has an unpaired electron, it is highly reactive. (This is true of any substance with unpaired electrons, known as a free radical. ) This hydroxyl radical can react with all kinds of biological molecules (DNA, proteins, enzymes, and so on), causing damage to the molecules and disrupting phys...
openbookqa
obqa_02_01720
Birds are a vehicle for spreading the seeds of what?
[ "winds", "dissent", "flame", "oaks" ]
D
birds are a vehicle for spreading the seeds of a plant
sciq
sciq_01_10817
Sublimation and deposition involve direct transitions between solid and gas without going through which state?
[ "chemical", "homeostasis", "liquid", "carbon" ]
C
Sublimation and deposition involve direct transitions between solid and gas without going through the liquid state.
openbookqa
obqa_02_04247
the Grand Canyon was formed by the Colorado River doing what over long periods of time?
[ "blazing", "melting", "moving steadily", "evaporating" ]
C
the Grand Canyon was formed by the Colorado River flowing over long periods of time
openbookqa
obqa_02_01281
Bats use the organs on the side of their heads to
[ "receive short radio pulses", "hold up their sunglasses", "create lift for flight", "attract a potential mate" ]
A
bats can echolocate
ARC-Easy
arc_04_00247
Which is a process that occurs during photosynthesis?
[ "Plants take in oxygen and release sugar.", "Plants take in sugar and release minerals.", "Plants take in minerals and release carbon dioxide.", "Plants take in carbon dioxide and release oxygen." ]
D
null
math_qa
mathqa_03_02452
to produce an annual income of rs . 1200 from a 12 % stock at 90 , the amount of stock needed is :
[ "rs . 10,000", "rs . 10,800", "rs . 14,400", "rs . 16,000" ]
A
solution for an income of rs . 12 , stock needed = rs . 100 . for an income of rs . 1200 , stock needed = rs . 100 / 12 x 1200 = 10000 answer a
ARC-Challenge
arc_04_03163
Wind is becoming more common as a source of energy. Wind farms require large open spaces for the wind turbines. A negative consequence of this technology is wind turbines
[ "are an inexpensive source of energy.", "cause little pollution to the environment.", "may hurt the flying animals in the area.", "are a renewable source of energy." ]
C
null
sciq
sciq_01_03900
What can be defined simply, as a change in position?
[ "velocity", "motion", "speed", "gravity" ]
B
You can see several examples of people or things in motion in Figure below . You can probably think of many other examples. You know from experience what motion is, so it may seem like a straightforward concept. Motion can also be defined simply, as a change in position. But if you think about examples of motion in mor...
sciq
sciq_01_02532
The distance between the crests of electromagnetic waves is called what?
[ "crest", "wavelength", "trough", "variation" ]
B
math_qa
mathqa_03_01383
find the value of x : x ² + 6 x + 9 .
[ "9", "- 1", "- 3", "3" ]
C
that quadratic is factored as follows : x ² + 6 x + 9 = ( x + 3 ) ( x + 3 ) . lesson 17 . now , it is easy to see that that both factors will be 0 when x = - 3 . the solution is : x = - 3 c
sciq
sciq_01_09145
Where does electric power originate?
[ "power plants", "magnets", "the Sun", "coal mines" ]
A
Power plants are where electric power originates. They have electric generators that generate electric current through electromagnetic induction.
sciq
sciq_01_05959
What scale measures acidity?
[ "frequency scale", "ph scale", "richter scale", "salinity scale" ]
B
Note that Earth's axis of rotation is tilted. The axis is not perpendicular to the plane of the ecliptic. This plane is the one that solar system bodies are mostly lined up in.
medmcqa
medmcqa_05_02851
Cells are most radiosensitive in:
[ "S-phase", "M-phase", "G1-phase", "G0–phase" ]
B
Cells are most radiosensitive in G2-M interphase. Cells are least radiosensitive in S phase.
openbookqa
obqa_02_01217
After exiting the gym, the man's heart rate was most likely?
[ "higher", "lower", "normal", "fluctuating" ]
A
as energy required for an activity increases , pulse will increase
openbookqa
obqa_02_02956
Which would likely be a chemical reaction
[ "an ember", "oil and water", "steel and iron", "play dog" ]
A
chemical reactions cause chemical change
ARC-Easy
arc_04_01288
Homes that are built to be environmentally friendly because they use energy more efficiently than other homes are called "green" homes. "Green" homes often have reflective roofs and walls made of recycled materials. The windows in these energy-saving homes are double-paned, meaning each window has two pieces of glass. ...
[ "chemical energy", "mechanical energy", "a renewable energy source", "a nonrenewable energy source" ]
C
null
math_qa
mathqa_03_04572
a , b and c can complete a piece of work in 24 , 6 and 12 days respectively . working together , they will complete the same work in :
[ "33 / 7", "43 / 7", "24 / 7", "19 / 7" ]
C
if a can do a piece of work in n days , then a ' s 1 day ' s work = 1 / n ( a + b + c ) ' s 1 day ' s work = 1 / 24 + 1 / 6 + 1 / 12 = 7 / 24 so , all the three together will complete the job in = 24 / 7 days answer : c
math_qa
mathqa_03_00145
100 liter solution of cool - drink is made from 10 % jasmine water . if 5 liters of jasmine and 10 liters of water were added to the solution , what percent of the solution is jasmine ?
[ "1 / 13", "2 / 23", "3 / 31", "4 / 15" ]
B
denominator 100 + 5 + 10 115 numerator 100 * 0.1 = 10 - - - > jasmine water 10 + 5 = 15 - - - > new content of jasmine water in new solution ratio 3 / 23 answer is b
sciq
sciq_01_04180
What system includes lymph organs, lymph vessels, lymph, and lymph nodes?
[ "immature", "immune", "digestion", "nervous" ]
B
The immune system includes lymph organs, lymph vessels, lymph, and lymph nodes.
math_qa
mathqa_03_04299
the average age of students of a class is 15.8 years . the average age of boys in the class is 16.4 years and that of the girls is 15.4 years . the ration of the number of boys to the number of girls in the class is :
[ "2 : 5", "2 : 3", "2 : 4", "2 : 1" ]
B
"let the ratio be k : 1 . then , k * 16.4 + 1 * 15.4 = ( k + 1 ) * 15.8 = ( 16.4 - 15.8 ) k = ( 15.8 - 15.4 ) = k = 0.4 / 0.6 = 2 / 3 required ratio = 2 / 3 : 1 = 2 : 3 . answer : b"
openbookqa
obqa_02_04875
something in a cold place becomes what?
[ "warmish", "toasty", "hot", "chilly" ]
D
something in a cold place becomes cold
medmcqa
medmcqa_05_03459
Which of the following is the reference standard on which classification of protein-energy malnutrition is based –
[ "Gomez classification", "10th percentile of weight for age of ICMR", "80% of the 50th percentile of weight of ICMR", "80% of the 50th percentile of weight for age of American standard" ]
D
For national and international comparisons and for monitoring, "reference or standard values" of growth are essential. The well known reference standards are - 1. Harvard (or Boston) standards Not in common used Have been replaced by WHO reference values 2. WHO reference values Most commonly used reference values f...
medmcqa
medmcqa_05_04886
Which disease is caused by anti-phospholipase 2 antibody:
[ "MPGN", "MGN", "FSGN", "MCD" ]
B
Ans. b. MGNMEMBRANOPROLIFERATIVE GLOMERULONEPHRITIS (MPGN)Type I--subendothelial immune complex (IC) deposits with granular IF; "tram-track" appearance on PAS stain (See figure A) and HandE stain (See figure B) due to GBM splitting caused by mesangial in growth.Type II--also called dense deposit disease.MPGN is a nephr...
medmcqa
medmcqa_05_01935
Subtype of leprosy with maximum number of TH -1 cells -
[ "TT", "BB", "LL", "Borderline leprosy" ]
A
Ans. is 'a' i.e., TT TT --4. Max. no. of CD4 - T cells (TH -1) 11, --II. Max. no. of CD8 - T cells
sciq
sciq_01_04701
Fertilizer runoff can create what type of zones in the ocean?
[ "barren zones", "hot zones", "dead zones", "fresh zones" ]
C
Fertilizer runoff can create dead zones in the ocean.
openbookqa
obqa_02_03329
Which two events are guaranteed to each happen in a 24 hour cycle?
[ "a large star appearing and disappearing", "an earthquake and a tornado", "a rainbow and a tsunami appearing", "a dog barking and a vitamin being eaten" ]
A
the sun setting occurs once per day
sciq
sciq_01_03209
In frequency, the larger the air column, the larger the what?
[ "absorption", "mass", "gravity", "wavelength" ]
D
a) The water forms the bottom of the tube and thus where the node of the wave will be. Thus the air column is where the sound wave can exist. The larger the air column, the larger the wavelength. Frequency is inversely proportional to wavelength, thus the tube with the smallest air column will have the highest frequenc...
medmcqa
medmcqa_05_04524
Ectopic pregnancy differs from threatened aboion by :
[ "Minimal vaginal bleeding", "Pain follows bleeding", "Uterine size corresponds to gestational age", "Manifests at an early age" ]
D
Ans. is d i.e. Manifests at an early age This is a tough one : as it is quite difficult to differentiate between Ectopic pregnancy and threatened aboion on the clinical grounds. Ectopic pregnancy Vs Manifests at an early age Symptom-chronology : Abdominal pain is followed by bleeding. Pain is the main symptom. Fainting...
medmcqa
medmcqa_05_02000
Not used for treating acute iron poisoning:March 2009
[ "Desferrioxamine", "BAL", "Magnesium hydroxide", "Hemodialysis" ]
B
Ans. B: BALChelation with desferrioxamine is the mainstay of therapy.It is indicated for serum iron levels >350 mcg/ dL with evidence of toxicity or >500 mcg/ dL regardless of signs or symptoms.Because adsorption to activated charcoal is minimal, whole bowel irrigation is the GI decontamination (polyethylene glycol) is...
sciq
sciq_01_03469
Ticks spread bacteria that causes what condition?
[ "Malaria", "Dengue fever", "Rabies", "lyme disease" ]
D
Bacterial Disease Vectors. Ticks spread bacteria that cause Lyme disease. Deerflies spread bacteria that cause tularemia.
openbookqa
obqa_02_02870
In saltwater, a squid's method of locomotion results in water being
[ "pushed in front of it", "sung about by Jethro Tull", "displaced in the Great Lakes", "displaced directly behind it" ]
D
a squid produces thrust by pushing water out of its body