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7.76k
sciq
sciq_01_10526
Excretion is the process of removing excess water and wastes from the body. what are the main organs of excretion?
[ "eyes", "brains", "lungs", "kidneys" ]
D
Excretion is the process of removing wastes and excess water from the body. It is one of the major ways the body maintains homeostasis. Although the kidneys are the main organs of excretion, several other organs also excrete wastes. They include the large intestine, liver, skin, and lungs. All of these organs of excret...
medmcqa
medmcqa_05_02601
Suspended animation may be seen with :
[ "Electrocution", "Strangulation / hanging", "Drowning", "Burn" ]
A
A i.e. Electrocution Suspended animation (i.e. apparent death) is seen in electrocution & apparently drowned (not drowning)Q
sciq
sciq_01_05392
Which two systems together provide support to the body and allow for movement?
[ "vascular and muscular", "skeletal and muscular", "muscular and nervous", "skeletal and digestive" ]
B
16.5 | Musculoskeletal System By the end of this section, you will be able to: • Discuss the axial and appendicular parts of the skeletal system • Explain the role of joints in skeletal movement • Explain the role of muscles in locomotion The muscular and skeletal systems provide support to the body and allow for movem...
sciq
sciq_01_03276
Chemical reactions always involve what?
[ "fuel", "energy", "heating", "physical change" ]
B
Chemical reactions always involve energy. Energy is a property of matter that is defined as the ability to do work. When methane burns, for example, it releases energy in the form of heat and light. Other chemical reactions absorb energy rather than release it.
medmcqa
medmcqa_05_04712
A 20 yrs adult presents with severe hypoplastic anemia. Which of the following represent the most effective treatment?
[ "IL-2", "a - interferon", "Anti thymocyte globulin", "Bone marrow transplant" ]
D
Bone marrow transplantation from matched siblings after a preparative regimen of high dose cyclophosphamide and antithymocyte globulin can cure up to 90% of patients aged less than 40 years with severe aplastic anemia. Ref: Current Medical Diagnosis and Treatment, 2012, Chapter 13; Harrison's Principle of Internal Medi...
sciq
sciq_01_10359
Respectively, which parts of the circulatory system carry blood from the heart toward capillaries, and return blood to the heart from capillaries?
[ "arteries and capillaries", "parasites and veins", "arteries and veins", "organs and veins" ]
C
openbookqa
obqa_02_04677
Bees are key to a flowers
[ "procreation", "water supply", "sun intake", "color" ]
A
A bee is a pollinating animal
medmcqa
medmcqa_05_04783
Total number of dehydrogenases in Krebs cycle
[ "3", "2", "4", "5" ]
C
There are total 4 dehydrogenases present in kreb's cycle: 1. Isocitrate dehydrogenase 2. a- Ketoglutarate dehydrogenase complex 3. Succinate dehydrogenase 4. Malate dehydrogenase
medmcqa
medmcqa_05_03390
for diagnosisng bulimia nervosa binge eating should be present for a dutration of
[ "once in 3 months", "once a week", "once in 2 months", "once a month" ]
B
Bulimia nervosa * Gender==== more common in females * Age=======adolescence * Comorbidity=== depression and social phobia * Duration====3 months * Criteria= * Binge eating at least once a week for 3 months * Uses laxatives, diuretics, self-induced vomiting * Association= * Impulsive behaviors * increased interest in se...
sciq
sciq_01_02181
What is the name of the wind belt nearest the equator?
[ "trade winds", "tropical gusts", "cyclones", "doldrums" ]
A
The wind belts have names. The Trade Winds are nearest the Equator. The next belt is the westerlies. Finally are the polar easterlies. The names are the same in both hemispheres.
sciq
sciq_01_06465
What is a gram stain used to identify ?
[ "different types of bacteria", "radioactivity", "acids or bases", "different types of liquids" ]
A
Different types of bacteria stain a different color when Gram stain is applied to them. This makes them easy to identify. Some stain purple and some stain red, as you can see in Figure below . The two types differ in their outer layers. This explains why they stain differently.
sciq
sciq_01_07047
What is contained in the skin of brightly colored poison dart frogs?
[ "spores", "poison", "toxins", "acid" ]
C
Adrian Pingstone (Wikimedia: Arpingstone). Brightly colored poison dart frogs have toxins in their skin . Public Domain.
ARC-Challenge
arc_04_02446
Which phrase best describes the mass of an object?
[ "the weight of the object", "the volume of the object", "the amount of matter in the object", "the amount of gravitational pull on the object" ]
C
null
sciq
sciq_01_11003
What do nonvascular plants reproduce with?
[ "spores", "toxins", "photosynthesis", "vascular plants" ]
A
Nonvascular plants are low-growing, reproduce with spores, and need a moist habitat.
ARC-Easy
arc_04_02138
Scientists think that dolphins and whales may have evolved from a common ancestor. What evidence supports this hypothesis?
[ "They swim the same way.", "They eat the same food.", "They live in the same area of the ocean.", "They have similar anatomies." ]
D
null
openbookqa
obqa_02_04893
As altitude increases, the air temperature will do what?
[ "rise", "go up", "nosedive", "elevate" ]
C
as altitude increases , the temperature of the air will decrease
sciq
sciq_01_00050
A pulley changes the direction of the force t exerted by the cord without changing its what?
[ "longitude", "magnitude", "position", "latitude" ]
B
automobile axle drives a wheel, which has a much larger diameter than the axle. The MA is less than 1. (c) An ordinary pulley is used to lift a heavy load. The pulley changes the direction of the force T exerted by the cord without changing its magnitude. Hence, this machine has an MA of 1.
math_qa
mathqa_03_01204
when greenville state university decided to move its fine arts collection to a new library , it had to package the collection in 20 - inch by 20 - inch by 12 - inch boxes . if the university pays $ 0.40 for every box , and if the university needs 2.16 million cubic inches to package the collection , what is the minimum...
[ "$ 120", "$ 180", "$ 310", "$ 450" ]
B
"the volume of each box is 20 * 20 * 12 = 4800 cubic inches . number of boxes = 2 , 160,000 / 4800 = 450 boxes total cost = 450 × $ 0.4 = $ 180 the answer is b ."
medmcqa
medmcqa_05_00583
Membranous glomerulonephritis is associated with-
[ "Renal Venous thrombosis", "Hodgkin's disease", "Subepithelial immune deposits", "Hematuria" ]
A
Membranous nephropathy Membranous nephropathy is the most common cause of nephrotic syndrome in Caucasian adults. It is caused by antibodies (usually autoantibodies) directed at antigen(s) and venous thrombosis Antigens expressed on the surface of the podocytes, including the M-type phospholipase A2 receptor 1. While m...
math_qa
mathqa_03_00923
a can give b 80 meters start and c 200 meters start in a kilometer race . how much start can b give c in a kilometer race ?
[ "130.12", "130.43", "130.22", "111.0" ]
B
a runs 1000 m while b runs 920 m and c runs 800 m . the number of meters that c runs when b runs 1000 m , = ( 1000 * 800 ) / 920 = 869.56 m b can give c = 1000 - 869.56 = 130.43 m . answer : b
openbookqa
obqa_02_00172
Iron is used to make
[ "pottery clay for kilns", "baking sheet for cookies", "items that fasten roofing to roofs", "twist ties for bread bags" ]
C
iron nails are made of iron
sciq
sciq_01_03751
Water molds mostly live in water or moist?
[ "soil", "plants", "cells", "biomes" ]
A
Define physical change, and give examples of physical change.
medmcqa
medmcqa_05_04875
Substrate-level phosphorylation seen in a reaction catalysed in
[ "Succinate dehydrogenase", "Alpha-ketoglutarate dehydrogenase", "Succinyl CoA thiokinase", "Malate dehydrogenase" ]
C
Substrate level phosphorylation is catalysed by : (i) In glycolysis: Phosphoglycerate kinase, pyruvate kinase; and (ii) In TCA cycle: Succinate thiokinase.
sciq
sciq_01_09958
All seed plants and a few seedless vascular plants are what?
[ "protozoans", "heterosporous", "zygotes", "homosporous" ]
B
math_qa
mathqa_03_03326
two - third of a positive number and 49 / 216 of its reciprocal are equal . the number is :
[ "5 / 12", "7 / 12", "25 / 144", "144 / 25" ]
B
"let the number be x . then , 2 / 3 x = 49 / 216 * 1 / x x 2 = 49 / 216 * 3 / 2 = 49 / 144 x = 7 / 12 answer : b"
ARC-Challenge
arc_04_02813
Which equation is correctly balanced for hydrogen and oxygen reacting to form water?
[ "H_{2} + O_{2} -> H_{2}O", "2H_{2} + O_{2} -> 2H_{2}O", "4H + O_{2} -> 2H_{2}O", "H_{2} + O -> H_{2}O" ]
B
null
openbookqa
obqa_02_03618
Sara sorted her marbles into glass ones and marbles made of crystal. This is an example of
[ "classifying", "weighing", "clarifying", "justifying" ]
A
classifying is when one sorts something by type
openbookqa
obqa_02_02269
A person wants to dry pips from sunflowers and then can plant those pips knowing that they have enough
[ "financing", "nutriment", "grain", "solar wind" ]
B
a seed is used for storing food for a new plant
sciq
sciq_01_00428
What is the base of nearly all food chains on earth?
[ "photosynthesis", "synthesis", "glycolysis", "atherosclerosis" ]
A
Photosynthesis is the base of nearly all food chains on Earth. This is true of marine food chains, too.
ARC-Easy
arc_04_00291
A drain cleaner consists of sodium hydroxide and aluminum. When the drain cleaner is added to water, bubbles of hydrogen are produced, and the solution becomes very hot. Which of these best describes what happens to form the bubbles when the cleaner is added to water? F
[ "chemical reaction", "Condensation", "A physical change", "Evaporation" ]
A
null
openbookqa
obqa_02_02292
A bird species may decide to relocate to hotter areas when weather
[ "sears", "cools", "warms", "burns" ]
B
migration is when animals move themselves from a cooler climate to a warmer climate for the winter
openbookqa
obqa_02_02085
Which of the following is likely to eat berries?
[ "a sparrow", "a lobster", "a tiger", "a walrus" ]
A
birds sometimes eat berries
sciq
sciq_01_07956
What force pulls people and objects toward the center of the earth?
[ "magnetism", "variation", "motion", "gravity" ]
D
You are already very familiar with Earth’s gravity. It constantly pulls you toward the center of the planet. It prevents you and everything else on Earth from being flung out into space as the planet spins on its axis. It also pulls objects above the surface, from meteors to skydivers, down to the ground. Gravity betwe...
sciq
sciq_01_03677
What are the smallest particles of elements that maintain their unique properties?
[ "molecules", "atoms", "electrons", "protons" ]
B
A: The discovery of particles smaller than atoms doesn’t mean that we should scrap the entire theory. Atoms are still known to be the smallest particles of elements that have the properties of the elements. Also, it is atoms—not particles of atoms—that combine in fixed proportions in compounds. Instead of throwing out ...
openbookqa
obqa_02_03148
A plane taking off from an airport will seem what as it flies away
[ "empty", "smaller", "the same", "bigger" ]
B
as distance to an object increases , that object will appear smaller
medmcqa
medmcqa_05_00184
Most common cause of Auto splenectomy
[ "Sickle cell anemia", "SLE", "Pneumococcal sepsis", "Thalassemia" ]
A
A,b,C are causes of Auto splenectomy m/c cause is sickle cell anemia.
sciq
sciq_01_04614
What is the limiting factor for bacteria in a dish?
[ "space", "material", "speed", "density" ]
A
The blades of simple leaves are not divided. This provides the maximum surface area for collecting sunlight.
sciq
sciq_01_01865
Photoautotrophs and chemoautotrophs are two basic types of what?
[ "consumers", "decomposers", "autotrophs", "plants" ]
C
Producers are organisms that produce food for themselves and other organisms. They use energy and simple inorganic molecules to make organic compounds. The stability of producers is vital to ecosystems because all organisms need organic molecules. Producers are also called autotrophs . There are two basic types of auto...
openbookqa
obqa_02_01586
An object that contains gas often goes
[ "in circles", "forward", "down", "up" ]
D
a balloon contains gas
sciq
sciq_01_10244
The simplest example of what type of 'organ system' is the gastrovascular cavity found in organisms with only one opening for the process?
[ "digestive", "respiratory", "cardiovascular", "nervous" ]
A
Invertebrate Digestive Systems Animals have evolved different types of digestive systems to aid in the digestion of the different foods they consume. The simplest example is that of a gastrovascular cavity and is found in organisms with only one opening for digestion. Platyhelminthes (flatworms), Ctenophora (comb jelli...
sciq
sciq_01_00127
While the egg is developing, other changes are taking place in the uterus. it develops a thick lining that is full of what?
[ "large arteries", "amniotic fluid", "white blood cells", "tiny blood vessels" ]
D
While the egg is developing, other changes are taking place in the uterus. It develops a thick lining that is full of tiny blood vessels. The lining prepares the uterus to receive a fertilized egg if fertilization actually takes place.
medmcqa
medmcqa_05_01394
Study of designing equipment and devices that fit the human body, it&;s movements and it&;s cognitive abilities is
[ "Economics", "Ergonomics", "Bionomics", "Socionomics" ]
B
Study of designing equipment and devices that fit the human body, it&;s movements and its cognitive abilities is ergonomics The object of ergonomics is " to achieve the best mutual adjustment of man and his work, for the improvement of human efficiency and well-being"Park 23e pg: 803
math_qa
mathqa_03_04364
if 50 % of ( x - y ) = 40 % of ( x + y ) then what percent of x is y ?
[ "2.5 %", "11 %", "5 %", "15 %" ]
B
"50 % of ( x - y ) = 40 % of ( x + y ) ( 50 / 100 ) ( x - y ) = ( 40 / 100 ) ( x + y ) 5 ( x - y ) = 4 ( x + y ) x = 9 y x = 9 y therefore required percentage = ( ( y / x ) x 100 ) % = ( ( y / 9 y ) x 100 ) = 11 % answer is b ."
ARC-Challenge
arc_04_02736
Which of these is a composite material?
[ "a glass window", "a bronze statue", "an aluminum can", "a fiberglass bumper" ]
D
null
openbookqa
obqa_02_00348
The source of a type of energy we use is a
[ "planet", "star", "meteor", "rock" ]
B
the sun is the source of solar energy called sunlight
medmcqa
medmcqa_05_01811
Wire loop lesions are seen in
[ "SLE", "Diabetic nephropathy", "Benign nephrosclerosis", "Wegener's granulomatosis" ]
A
Ref Harrison 17/e p2077; Robbins 8/e p218;9/e p224 Subendothelial deposits create a homogenous thickness iof the capillary wall called wire loop lesson.which can be seen on light microscopy
math_qa
mathqa_03_03067
when a merchant imported a certain item , she paid a 7 percent import tax on the portion of the total value of the item in excess of $ 1,000 . if the amount of the import tax that the merchant paid was $ 109.90 , what was the total value of the item ?
[ "$ 1940", "$ 2150", "$ 2360", "$ 2570" ]
D
let x be the value of the item . 0.07 * ( x - 1000 ) = 109.90 x = 2570 the answer is d .
sciq
sciq_01_09406
The white mountains in new hampshire are part of what province?
[ "geologic", "appalachian", "montreal", "antarctic" ]
B
The White Mountains in New Hampshire are part of the Appalachian province. The mountains are only around 6,000 feet high.
sciq
sciq_01_07919
A major disturbance in what results in an episode of severe weather called a storm?
[ "the oceans", "the core", "the ozone layer", "the atmosphere" ]
D
A storm is an episode of severe weather. It is caused by a major disturbance in the atmosphere. Types of storms include thunderstorms, tornadoes, and hurricanes.
math_qa
mathqa_03_00781
how many numbers between 1000 and 5000 are exactly divisible by 225 ?
[ "16", "18", "19", "12" ]
B
explanation : first multiple of 225 after 1000 is 1125 ( 225 ã — 5 ) and last multiple of 225 before 5000 is 4950 ( 225 ã — 22 ) total number are l + a / d = 4950 - 1125 / 225 + 1 = 18 answer is b
medmcqa
medmcqa_05_04422
The operation of choice for the below condition
[ "Division of annular ring", "Gastrojejunostomy", "Duodenojejunostomy", "Pancreaticoduodenal tom" ]
C
The treatment of annular pancreas is duodenojejunostomy or gastrojejunostomy either of which bypasses the obstruction. According to Bailey and Love duodenoduodenostomy or duodenojejunostomy are usual operation. Obstructing pancreatic ring must not be simply divided. Since this may not relieve the obstruction and pancre...
medmcqa
medmcqa_05_03664
Which of following is not seen in nephritic syndrome:
[ "Edema", "Hematuria", "Hypertension", "Hypocholesterolemia" ]
D
d. Hypocholesterolemia(Ref: Nelson's 20/e p 2521-2528, Ghai 8/e p 477-482)Features of nephritic syndrome are: Hematuria and RBC casts, Nephritic range Proteinuria (<3.5g/day), hence edema is present, Hypertension, Uremia and Oliguria.
sciq
sciq_01_11454
During interphase of what process, each chromosome is duplicated, and the sister chromatids formed during synthesis are held together at the centromere region by cohesin proteins?
[ "digestion", "meiosis", "apoptosis", "mitosis" ]
B
Chapter 11 1 Figure 11.9 Yes, it will be able to reproduce asexually. 2 C 4 D 6 C 8 C 10 C 12 B 14 During the meiotic interphase, each chromosome is duplicated. The sister chromatids that are formed during synthesis are held together at the centromere region by cohesin proteins. All chromosomes are attached to the nucl...
medmcqa
medmcqa_05_03341
Which of the following body secretions is maximum:
[ "Salivary", "Gastric", "Sweat", "Lacrimal" ]
B
Option 1 - Overall, the three pairs of salivary glands that drain into the mouth, supply 1000 to 1500 mL of saliva per day. Option 2 - Gastric secretion adds about 2.5 L per day to the intestinal contents. Option 3 - The insensible water loss amounts to 50ml/h in humans. During muscular exertion in a hot environment, s...
ARC-Easy
arc_04_00317
In a lab investigation, a student notes that two metal blocks have the same mass. Based on this observation, if the two blocks were put on opposite sides of a balance, they would best represent
[ "balanced forces.", "unbalanced forces.", "equal and opposite reactions.", "objects in motion." ]
A
null
sciq
sciq_01_10440
What type of solid has atoms arranged in a repeating pattern?
[ "hydrocarbons", "ions", "crystals", "metals" ]
C
Some solids are not crystals. Glass, or the rock obsidian, are solid. However, they are not crystals. In a crystal , the atoms are arranged in a pattern. This pattern is regular and it repeats. The image below shows how the atoms are arranged in halite (table salt) ( Figure below ). Halite contains atoms of sodium and ...
math_qa
mathqa_03_04312
if x < y < z and y - x > 1 , where x is an even integer and y and z are odd integers , what is the least possible value of z - x ?
[ "6", "3", "8", "9" ]
B
"we have : 1 ) x < y < z 2 ) y - x > 1 3 ) x = 2 k ( x is an even number ) 4 ) y = 2 n + 1 ( y is an odd number ) 5 ) z = 2 p + 1 ( z is an odd number ) 6 ) z - x = ? least value z - x = 2 p + 1 - 2 k = 2 p - 2 k + 1 = 2 ( p - k ) + 1 - that means that z - x must be an odd number . we are asked to find the least value ...
medmcqa
medmcqa_05_02855
What is the use of the instrument shown here?
[ "To catch bleeding artery", "Occlude bowel", "Vascular clamp", "Clip the towel" ]
D
Ans. (d) Clip the towel* Towel clips are used to hold the sterile dressing after drape in position* Some surgeons use this to hold and retract the tongue outside for intra oral surgeries.
medmcqa
medmcqa_05_03890
Which of the following is not mediated through negative feed back mechanism -
[ "BP", "GH formation", "Thrombus formation", "ACTH release" ]
C
Ans. is 'c' i.e.. Thrombus formation Negative feedback systemo Most control systems in the body act by negative feedback.o In this if some factor become excessive, a control system initates negative feedback, which consist of series of changes that return the factor towards a certain mean value,o Examples are:# ACTH se...
math_qa
mathqa_03_01107
if the number is decreased by 5 and divided by 7 the result is 7 . what would be the result if 34 is subtracted and divided by 10 ?
[ "4", "7", "8", "2" ]
D
"explanation : let the number be x . then , ( x - 5 ) / 7 = 7 = > x - 5 = 49 x = 54 . : ( x - 34 ) / 10 = ( 54 - 34 ) / 10 = 2 answer : option d"
sciq
sciq_01_10825
What is the name of the bone that forms the forehead?
[ "upper bone", "high bone", "frontal bone", "forebone" ]
C
Frontal Bone The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella (see Figure 7.5). The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin, is the supraorbital foramen, the o...
openbookqa
obqa_02_02711
Which of the following is most likely to occur?
[ "an archaeologist finds an ancient crustacean in magma", "an archaeologist finds an ancient crustacean in limestone", "an archaeologist finds an ancient human in limestone", "an archaeologist finds an ancient human in magma" ]
B
organisms can be preserved in sedimentary rock
medmcqa
medmcqa_05_01300
Protein separation based on moleular size -
[ "HPLC", "Gel filtration chromatography", "Salting out", "Affinity chromatography" ]
B
Ans. is 'b' i.e., Gel filtration chromatographyProperty of protein usedMethodProtein solubility'Salting out' or salt extraction (precipitation of protein by ammonium sulfate)Molecular sizeo Gel filtration chromatography (molecular-sieve chromatography or size exclusion chromatography)o Ultracentrifugationo SDS-PAGE (So...
sciq
sciq_01_03695
What are are segmented invertebrates in phylum annelida called?
[ "fungi", "corals", "annelids", "flatworms" ]
C
Annelids are segmented invertebrates in Phylum Annelida. They include earthworms, polychaete worms, and leeches. Annelids have a coelom and several organ systems. Their body segments may have a variety of different structures such as tentacles or suckers. Annelids may be predators, parasites, filter feeders, or decompo...
sciq
sciq_01_09483
Plant-like protists are autotrophs, meaning they make their own what?
[ "molds", "spores", "flowers", "food" ]
D
Plant-like protists are autotrophs, meaning they make their own food.
sciq
sciq_01_06868
Which single most factor is responsible for the extinction of hundreds of species of birds?
[ "habitat", "animal actions", "diet", "human actions" ]
D
Hundreds of species of birds have gone extinct as a result of human actions. A well-known example is the passenger pigeon. It was once the most common bird in North America, but over-hunting and habitat destruction led to its extinction in the 1800s. Habitat destruction and use of the pesticide DDT explain the recent e...
sciq
sciq_01_06951
What are the properties of solutions called that depend only on the concentration of dissolved particles and not on their identity?
[ "platyhelminth properties", "platyhelminth properties​", "colligative properties", "platyhelminth properties" ]
C
The vapor pressure of a solution is lower than that of the pure solvent at the same temperature. This decrease in vapor pressure is one example of a colligative property . Colligative properties are properties of solutions that depend only on the concentration of dissolved particles and not on their identity.
openbookqa
obqa_02_03178
If a high percentage of water is visible in the air?
[ "this is called heat and it is unsafe to drive in", "this is called fog and it is safe to drive in", "this is called heat and is safe to drive in", "this is called fog and is unsafe to drive in" ]
D
fog is formed by water vapor condensing in the air
medmcqa
medmcqa_05_02302
Biological Amnesia is
[ "Presenile Dementia", "Lack of interest", "Opioid drug addiction", "Hypothyroidism" ]
A
Thiamine deficiency, hypoglycemia, hypoxia (including carbon monoxide poisoning), and herpes simplex encephalitis all have a predilection to damage the temporal lobes, paicularly the hippocampi, and thus can be associated with the development of amnestic disorders. The below image show major causes of amnestic disorder...
sciq
sciq_01_02784
Most protists are aquatic organisms and need what kind of environment to survive?
[ "cold", "dry", "warm", "moist" ]
D
Most protists are aquatic organisms. They need a moist environment to survive. They are found mainly in damp soil, marshes, puddles, lakes, and the ocean. Some protists are free-living organisms. Others are involved in symbiotic relationships. They live in or on other organisms, including humans.
sciq
sciq_01_03177
What is a process in which some substances change into different substances?
[ "a toxic reaction", "a chemical reaction", "a thermodynamic reaction", "a bio reaction" ]
B
A chemical reaction is a process in which some substances change into different substances. In a chemical reaction, bonds break in reactants and new bonds form in products.
sciq
sciq_01_02325
Pressure has a significant effect on the solubility of what state of matter?
[ "water", "mixtures", "gases", "solids" ]
C
Pressure has very little effect on the solubility of solids or liquids, but has a significant effect on the solubility of gases. Gas solubility increases as the partial pressure of a gas above the liquid increases. Suppose a certain volume of water is in a closed container with the space above it occupied by carbon dio...
openbookqa
obqa_02_03843
Another term for wind energy is clean energy because the wind and air contains
[ "Seven", "under energy", "zero pollutants", "moon" ]
C
a windmill does not create pollution
sciq
sciq_01_01154
Elemental carbon is a black, dull-looking solid that conducts heat and this?
[ "light", "vibration", "electricity", "energy" ]
C
Elemental carbon is a black, dull-looking solid that conducts heat and electricity well. It is very brittle and cannot be made into thin sheets or long wires. Of these properties, how does carbon behave as a metal? How does carbon behave as a nonmetal?.
medmcqa
medmcqa_05_00543
An increase in contractility is demonstrated on a Frank-Starling diagram by
[ "Increased cardiac output for a given end-diastolic volume", "Increased cardiac output for a given end-systolic volume", "Decreased cardiac output for a given end-diastolic volume", "Decreased cardiac output for a given end-systolic volume" ]
A
The frank-starling law of the hea states that when increased quantities of blood flow into the hea, the increased blood stretches the walls of the hea chambers. As a result of the stretch, the cardiac muscle contracts with increased force, and this action empties the extra blood that has entered from the systemic circu...
sciq
sciq_01_03501
A solute generally does what to the freezing point of a solvent?
[ "regulates it", "lowers it", "raises it", "increases it" ]
B
A solute generally lowers the freezing point of a solvent, which is called freezing point depression. For example, spreading salt on an icy road melts the ice.
sciq
sciq_01_07276
As a battery is depleted what happens to its internal resistance?
[ "stagnates", "changes", "increases", "reduces" ]
C
The internal resistance r can behave in complex ways. As noted, r increases as a battery is depleted. But internal resistance may also depend on the magnitude and direction of the current through a voltage source, its temperature, and even its history. The internal resistance of rechargeable nickel-cadmium cells, for e...
sciq
sciq_01_03117
What secures teeth in the mouth?
[ "socket", "plug", "muscles", "cartilage" ]
A
Anatomy of a Tooth The teeth are secured in the alveolar processes (sockets) of the maxilla and the mandible. Gingivae (commonly called the gums) are soft tissues that line the alveolar processes and surround the necks of the teeth. Teeth are also held in their sockets by a connective tissue called the periodontal liga...
sciq
sciq_01_00189
Inside the nasal area of the skull, the nasal cavity is divided into halves by the what?
[ "cerebral cortex", "cell wall", "nasal septum", "cytoplasm" ]
C
Inside the nasal area of the skull, the nasal cavity is divided into halves by the nasal septum. The upper portion of the nasal septum is formed by the perpendicular plate of the ethmoid bone and the lower portion is the vomer bone. Each side of the nasal cavity is triangular in shape, with a broad inferior space that ...
math_qa
mathqa_03_00673
a milk man has 20 liters of milk . if he mixes 5 liters of water , which is freely available , in 20 liters of pure milk . if the cost of pure milk is rs . 18 per liter , then the profit of the milkman , when he sells all the mixture at cost price is :
[ "22", "25", "27", "29" ]
B
"explanation : when the water is freely available and all the water is sold at the price of the milk , then the water gives the profit on the cost of 20 liters of milk . therefore , profit percentage = \ inline \ frac { 5 } { 20 } \ times 100 = 25 % % [ profit % = \ inline \ frac { profit } { cost \ : price } \ times 1...
openbookqa
obqa_02_02410
A cow will gain energy from eating
[ "dandelions", "eggs", "frogs", "birds" ]
A
cows only eat plants
ARC-Easy
arc_04_00428
A layer of solid brittle rock comprises the outer 100 kilometers of Earth. This layer, which contains both the crust and the upper mantle, is called the
[ "core.", "sediment.", "lithosphere.", "hemisphere." ]
C
null
sciq
sciq_01_04983
How many processes contribute to the emergence of viral diseases?
[ "three", "four", "one", "two" ]
A
sciq
sciq_01_04913
What do you call the lower layer of soil that is permanently frozen, and is a frequent feature of tundra?
[ "solid", "underfoot", "permafrost", "solvent" ]
C
Polar climates are found near the North and South Poles. They also occur on high mountains at lower latitudes. The summers are very cool, and the winters are frigid. Precipitation is very low because it’s so cold. The growing season is very short. Tundra prefers areas of permafrost. Permafrost is a lower layer of soil ...
sciq
sciq_01_02869
Made of hot, solid rock, the mantle is beneath what layer of the earth?
[ "liquid", "volcanic", "core", "crust" ]
D
Beneath the crust is the mantle . The mantle is made of hot, solid rock. They know this because of seismic waves, meteorites, and the heat that comes from inside the planet. Mantle rock is mostly peridotite , which is rich in iron and magnesium ( Figure below ). Peridotite is rare at Earth's surface.
medmcqa
medmcqa_05_01249
A newborn baby has multiple hemorrhages. Clotting studies demonstrate an elevated prothrombin time. An abnormality of which of the following biochemical processes is likely present in this patient?
[ "Conversion of homocysteine to methionine", "Conversion of methylmalonyl CoA to succinyl CoA", "Degradation of cystathionine", "Formation of gamma-carboxyglutamate residues" ]
D
Deficiency of vitamin K produces a clotting disorder characterized by an elevated prothrombin time and easy bleeding, paicularly in neonates (hemorrhagic disease of the newborn). The biochemical basis for this hemorrhagic tendency is that glutamate residues on Factors II (Thrombin), VII, IX, and X must be conveed to ga...
sciq
sciq_01_09484
In what form do plants and animals store sugar for later use?
[ "processing polysaccharides", "management polysaccharides", "carrying polysaccharides", "storage polysaccharides" ]
D
medmcqa
medmcqa_05_02999
Major site of protein glycosylation is
[ "ER and golgi body", "Ribosome and golgi body", "ER and ribosome", "Ribosome and cytoplasm" ]
A
Because many glycosylation reactions occur within the lumen of the Golgi apparatus, carrier systems (permeases and transpoers) are required to transpo nucleotide sugars across the Golgi membrane.Ref: Harpers Illustrated Biochemistry, 30th edition, page no: 572
medmcqa
medmcqa_05_02558
Which drug is given as a single dose to prevent mother to child HIV transmission: March 2007
[ "Didanosine", "Nevirapine", "Acyclovir", "Nelfinavir" ]
B
Ans. B: Nevirapine Majority of mother to child transmission of HIV-1 occurs during the intrapaum period. Mechanism of veical transmission include infection after rupture of the membranes and direct contact of the fetus with infected secretions of blood from the maternal genital tract. Nevirapine is a non-nucleoside rev...
sciq
sciq_01_04534
What does an electric field surround?
[ "charged ions", "negative particle", "a charged particle", "neutral particles" ]
C
An electric field is a space surrounding a charged particle where the particle exerts electric force.
math_qa
mathqa_03_01951
if you add all the numbers on your mobile phone except 9 , what is the answer ?
[ "45", "28", "65", "36" ]
D
"we have to add 0 to 8 to find the answer . therefore 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 = 36 answer is d"
math_qa
mathqa_03_00154
if two integers x , y ( x > y ) are selected from - 10 to 5 ( inclusive ) , how many possible cases are there ?
[ "105", "120", "190", "210" ]
B
"if two integers x , y ( x > y ) are selected from - 10 to 5 ( inclusive ) , how many possible cases are there ? a . 150 b . 180 c . 190 d . 210 e . 240 - - > 16 c 2 = 16 * 15 / 2 = 120 . therefore , the answer is b ."
openbookqa
obqa_02_00746
A seismometer can note how earthquakes are
[ "small", "fast", "strong", "long" ]
C
a seismometer is used to measure the strength or magnitude of an earthquake
medmcqa
medmcqa_05_00456
Asymmetric Moro &;s reflex at birth is indicative of:
[ "HIE", "Brain damage", "Erb's palsy", "Kernicterus" ]
C
Ans. c. Erb's palsy (Ref: Care of Newborn 7/e p334; Ghai 6/e p146; CPDT 18/e p7)Asymmetric Moro's reflex at birth is indicative of Erb's palsy.Moro's Reflex:Obtained by placing the infant in a semi-upright position. The head is momentarily allowed to fall backward, with immediate resupport by the examiner's hand.The ch...
ARC-Challenge
arc_04_02722
In certain species of plants, purple flowers (P) are dominant to white flowers (p). If two heterozygous plants are crossed, what will be the phenotype of the offspring?
[ "100% purple flowers", "100% white flowers", "75% white flowers, 25% purple flowers", "25% white flowers, 75% purple flowers" ]
D
null
sciq
sciq_01_00075
What is the common word for potential difference in a circuit?
[ "watt", "velocity", "voltage", "frequency" ]
C
Conceptual Questions 19.1 Electric Potential Energy: Potential Difference 1. Voltage is the common word for potential difference. Which term is more descriptive, voltage or potential difference? 2. If the voltage between two points is zero, can a test charge be moved between them with zero net work being done? Can this...
openbookqa
obqa_02_01088
Sedimentary rock is where you'll find most
[ "pterodactyl bodies", "flutes", "pebbles", "wings." ]
A
nearly all fossils are found in sedimentary rock
ARC-Challenge
arc_04_02219
An ice cube placed in sunlight melts quickly. Which BEST explains this event?
[ "The Sun is far away.", "The Sun makes heat.", "The ice cube is a solid.", "The ice cube looks clear." ]
B
null
ARC-Challenge
arc_04_02851
Which factor best explains how many diseases, such as cancer, are formed within the body?
[ "A traumatic injury to the body has occurred.", "A disruption in the cell cycle has taken place.", "A response by the immune system was triggered by an allergic reaction.", "A mutation occurred during the process of crossing over." ]
B
null
sciq
sciq_01_08282
What are all tissues external to the vascular cambium called?
[ "nucleus", "membranes", "bark", "larvae" ]
C