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7.76k
sciq
sciq_01_10228
During what period on earth was coal formed?
[ "Neoproterozoic era", "Neoproterozoic", "the carboniferous period", "Mesozoic" ]
C
The Carboniferous Period : Next, during the Carboniferous Period (360–290 million years ago), widespread forests of huge plants left massive deposits of carbon that eventually turned to coal. The first amphibians evolved to move out of the water and colonize land, but they had to return to the water to reproduce. Soon ...
sciq
sciq_01_07650
Are scissors simple or compound machines?
[ "lever", "neither", "simple", "compound" ]
D
Look at the scissors in Figure below . As you can see from the figure, scissors consist of two levers and two wedges. You apply force to the handle ends of the levers, and the output force is exerted by the blade ends of the levers. The fulcrum of both levers is where they are joined together. Notice that the fulcrum l...
openbookqa
obqa_02_02054
A rabbit might die if
[ "it has insufficient money to buy food", "all the greenery was burned in a fire", "all of the rabbit's prey has disappeared", "all the other rabbits shun it" ]
B
an animal requires enough nutrients to survive
openbookqa
obqa_02_03719
A/an __________________ is reusable
[ "liquid soap", "dish towel", "band-aid", "apple" ]
B
something reusable can be used more than once
sciq
sciq_01_03509
Which vitamin is made in the skin when it is exposed to sunlight?
[ "Riboflavin", "Vitamin C", "Vitamin B1", "vitamin d" ]
D
Some sunlight is good for your health. Vitamin D is made in the skin when it is exposed to sunlight. But getting too much sun can be unhealthy. A sunburn is a burn to the skin that is caused by overexposure to UV radiation from the sun's rays or tanning beds.
medmcqa
medmcqa_05_02170
Mizuo - phenomenon is seen in –
[ "Fundus albipathicus", "Fundus flavimaculatus", "Oguchi's disease", "Choroideremia" ]
C
Fundus changes of Oguchi's disease becomes normal after prolonged dark adaptation. This is called Mizuo-Nakamura phenomenon.
ARC-Challenge
arc_04_02674
A son can inherit traits
[ "only from his father", "only from his mother", "from both his father and his mother", "from either his father or his mother, but not from both" ]
C
null
sciq
sciq_01_00797
The tidal forces near what celestial phenomena are so great they can actually tear matter from a companion star?
[ "black holes", "wormholes", "large holes", "dwarf star" ]
A
Tides are not unique to Earth but occur in many astronomical systems. The most extreme tides occur where the gravitational force is the strongest and varies most rapidly, such as near black holes (see Figure 6.26). A few likely candidates for black holes have been observed in our galaxy. These have masses greater than ...
medmcqa
medmcqa_05_03908
Among the following which has the highest quantity of retinol per 100g of fruit?
[ "Papaya", "Orange", "Ripe mango", "Tomato" ]
C
Papaya contain 118mcg,orange contain 25mcg,tomato contain 84mcg,mangi contain 313mcg of retinol per 100g
openbookqa
obqa_02_01790
A large elephant is put on a device that can measure how much force is being applied based on its mass amount. That device is:
[ "atomic mass", "a weighter", "kilograms", "a scale" ]
D
a scale is used for measuring weight
medmcqa
medmcqa_05_04359
Principal site of acidification of urine ______
[ "image_question", "image_question", "image_question", "image_question" ]
D
Principal site of acidification of urine is collecting duct. Acidification occurs in both distal tubule and collecting duct, but collecting duct, but collecting duct is more impoant. The urinary pH of 4.5 (limiting pH) is normally reached in the collecting ducts. In the late distal tubules and collecting ducts, the tub...
math_qa
mathqa_03_03167
what is the unit digit in 4 ^ 100 ?
[ "0", "1", "6", "3" ]
C
unit digit in 4 ^ 100 = unit digit in [ ( 4 ^ 4 ) ^ 25 ] but unit digit in 4 ^ 4 = 6 unit digit 4 ^ 100 = 6 answer is c
openbookqa
obqa_02_02470
Which describes the proper usage of bird beaks?
[ "skinny beats are best for sucking blood, fat beaks eat only eggs", "skinny beaks work in only large spaces, fat beaks can only fit in narrow spaces", "skinny beaks work to reach small spaces, fat beaks crack nuts", "skinny beaks work to filet fish, fat beaks are useless" ]
C
a skinny beak is used for obtaining food by a bird from small spaces
math_qa
mathqa_03_02269
a fill pipe can fill 1 / 6 of cistern in 90 minutes in how many minutes , it can fill 5 / 6 of the cistern ?
[ "450 min", "360 min", "240 min", "306 min" ]
A
"1 / 6 of the cistern can fill in 90 min 5 / 6 of the cistern can fill in = 90 * 6 * 5 / 6 = 450 min answer is a"
sciq
sciq_01_07706
What is a buildup of electric charges on objects?
[ "potential", "wattage", "conduction", "static" ]
D
Our Sun is a star , a sphere of plasma held together by gravity. It is an ordinary star that is extraordinarily important. The Sun provides light and heat to our planet. This star supports almost all life on Earth.
sciq
sciq_01_01459
What type of response do signal transductions within target cells bring about?
[ "psychological", "bacterial", "physiological", "resporatory" ]
C
sciq
sciq_01_09720
What sort of digestion do animals engage in?
[ "internal", "poison", "essential", "external" ]
A
Virtually all animals have internal digestion of food. Animals consume other organisms and may use special tissues and organs to digest them. (Other heterotrophs, such as fungi, absorb nutrients directly from the environment. ).
math_qa
mathqa_03_03375
if n is a positive integer , what is the remainder when ( 7 ^ ( 4 n + 2 ) ) ( 6 ^ n ) is divided by 10 ?
[ "1", "2", "4", "6" ]
C
this one took me bout 3 1 / 2 min . just testin numbers and what not . first notice that n is positive . save time by noticing thati worked out one solution where n = 0 only to find that thats not an option : p . 1 - 7 stands for ^ 1 thru 7 1 : 7 * 1 = 7 2 : 7 * 7 = 9 3 : 7 * 9 = 3 4 : 7 * 3 = 1 5 : 7 * 1 = 7 6 : 7 * 7...
sciq
sciq_01_03782
What part of the rainforest commonly has ferns and other ground plants?
[ "forest floor", "understory", "canopy layer", "emergent layer" ]
B
Ferns are common in the understory of the tropical rainforest.
openbookqa
obqa_02_03840
friction is used for stopping a vehicle by
[ "running", "singing", "smelting", "squeezing" ]
D
friction is used for stopping a vehicle by brakes
openbookqa
obqa_02_00786
The dispersal of what has a positive impact on plants?
[ "leaves", "bark", "branches", "kernels" ]
D
seed dispersal has a positive impact on a plant
ARC-Easy
arc_04_01249
What is the best way for a marine scientist to determine the eating habits of sharks?
[ "Tag one shark and monitor its eating habits for one day.", "Tag one shark and monitor its eating habits for one year.", "Tag several sharks and monitor their eating habits for one day.", "Tag several sharks and monitor their eating habits for one year." ]
D
null
medmcqa
medmcqa_05_03566
Cells are attached to their basal laminas by:
[ "Hemidesmosomes", "Macula adherens", "Zonula adherens", "Zonula occludens" ]
A
Hemidesmosomes are specialized junctional complexes, that contribute to the attachment of epithelial cells to the underlying basement membrane. Macula adherens or desmosomes provide mechanical adhesion by linking the cytoskeleton of adjacent cells together. Zonula adherens or adhering junctions cause the epithelial cel...
medmcqa
medmcqa_05_03629
What is the average number of mites found on the body in a person suffering from regular scabies?
[ "2-Jan", "10-May", "15-Oct", "15 - 20" ]
C
The difference between Norwegian scabies and regular scabies is the number of mites found on the infected individual. Regular scabies usually causes a person to host about 10 to 15 (range 3-50) mites at a time; a patient who has Norwegian scabies has thousands to millions.
sciq
sciq_01_00954
Trophic level 4 = tertiary consumers that eat what kind of consumers?
[ "primary consumers", "secondary consumers", "herbivores", "insects" ]
B
Trophic level 4 = tertiary consumers that eat secondary consumers.
sciq
sciq_01_01953
What do the muscles of the gastrointestinal tract do?
[ "keep food moving", "stop digestion", "break down food", "secrete stomach acid" ]
A
Organs of the GI tract are covered by muscles that contract to keep food moving along. A series of involuntary muscle contractions moves rapidly along the tract, like a wave travelling through a spring toy. The muscle contractions are called peristalsis. The diagram in Figure below shows how peristalsis works.
sciq
sciq_01_06080
What type of change occurs when matter changes chemically into an entirely different substance with different chemical properties?
[ "physical", "genetic", "chemical", "material" ]
C
Did you ever make a "volcano," like the one in Figure below , using baking soda and vinegar? What happens when the two substances combine? They produce an eruption of foamy bubbles. This happens because of a chemical change. A chemical change occurs when matter changes chemically into an entirely different substance wi...
sciq
sciq_01_07023
What is the measure of the amount of energy found in sound waves?
[ "decibels", "frequency", "intensity", "density" ]
C
A friend whispers to you in class in a voice so soft that you have to lean very close to hear what he’s saying. Later that day, your friend shouts to you across the football field. Now his voice is loud enough for you to hear him clearly even though he’s many meters away. Obviously, sounds can vary in loudness. Loudnes...
sciq
sciq_01_02216
What is the mildest type of brain injury?
[ "concussion", "dementia", "blunt trauma", "hydrocephalus" ]
A
The mildest and most common type of brain injury is a concussion . This is a bruise on the surface of the brain. It may cause temporary problems such as headache, drowsiness, and confusion. Most concussions in young people occur when they are playing sports, especially contact sports like football. Other sports, like s...
sciq
sciq_01_01853
The cycle of copper reacting is a good example of what principle?
[ "conservation of momentum", "conservation of mass", "law of inertia", "conservation of energy" ]
B
A series of chemical reactions where an initial amount of copper reacts with nitric acid, goes into solution, and disappears. Then a series of reactions proceed, only to have the copper metal recovered. The copper cycle is a good illustration of how mass is conserved in a given chemical reaction.
math_qa
mathqa_03_04517
if a solid sphere of radius 10 cms is moulded into 8 spherical solid balls of equal radius , then surface area of each ball ( in sq . cm ) is ?
[ "100 π'", "101 / π'", "99 π / 12'", "54 / 13 π'" ]
A
explanation : 4 / 3 π x 10 x 10 x 10 = 8 x 4 / 3 π rxrxr r = 5 4 π x 5 x 5 = 100 π answer is a
openbookqa
obqa_02_04750
If a plant is being nourished throughout all of itself, the reason is most likely
[ "plastic tubes", "internal tubes", "interior walls", "metal tubes" ]
B
phloem transports materials through the plant
math_qa
mathqa_03_00068
in town x , 64 percent of the population are employed , and 50 percent of the population are employed males . what percent of the employed people in town x are females ?
[ "16 %", "22 %", "32 %", "40 %" ]
B
"we are asked to find the percentage of females in employed people . total employed people 64 % , out of which 50 are employed males , hence 14 % are employed females . ( employed females ) / ( total employed people ) = 14 / 64 = 22 % answer : b ."
openbookqa
obqa_02_04587
Which would likely reproduce?
[ "copiers", "waterfowl", "rocks", "rivers" ]
B
An example of reproduction is laying eggs
sciq
sciq_01_08054
Focused on evolution, the studies of what man have reshaped and influenced all aspects of biology?
[ "charles darwin", "scopes", "Albert Einstein", "Linnaeus" ]
A
Evolution focuses on past life forms and how they turned into present life forms. The history of life on Earth demonstrates how the first cells formed, turned into simple life forms, and then became more complex plants and animals. The studies of Charles Darwin have reshaped and influenced all aspects of biology. The m...
math_qa
mathqa_03_02521
a man swims downstream 48 km and upstream 18 km taking 3 hours each time , what is the speed of the man in still water ?
[ "2", "8", "9", "11" ]
D
"48 - - - 3 ds = 16 ? - - - - 1 18 - - - - 3 us = 6 ? - - - - 1 m = ? m = ( 16 + 6 ) / 2 = 11 answer : d"
sciq
sciq_01_02435
What is muscle tissue that is attached to the bone called?
[ "skeletal tisse", "ligament", "cartilage", "epithelial tissue" ]
A
Muscle tissue that is attached to bone is skeletal muscle . Whether you are blinking your eyes or running a marathon, you are using skeletal muscle. Contractions of skeletal muscle are voluntary, or under conscious control. Skeletal muscle is the most common type of muscle in the human body, so it is described in more ...
medmcqa
medmcqa_05_03512
Persistent low C3 complement level is not found in
[ "Post streptococcal glomerulonephritis", "Mesangiocapillary glomerulonephritis", "Cryoglobulinemia", "SLE" ]
A
Ans. is 'a' i.e. poststreptococcal glomerulonephritis In post streptococcal glomerulonephritis the serum complement level is decreased transiently (not persistently)They classically return to normal within 6-8 weeks.Persistently decreased complement level after this period should suggest another disease.Also knowMembra...
math_qa
mathqa_03_03376
how many even number in the range between 8 to 100 inclusive are not divisible by 3
[ "15", "30", "32", "33" ]
C
"we have to find the number of terms that are divisible by 2 but not by 6 ( as the question asks for the even numbers only which are not divisible by 3 ) for 2 , 8,10 , 12,14 . . . 100 using ap formula , we can say 100 = 10 + ( n - 1 ) * 2 or n = 47 . for 6 , 12,18 , . . . 96 using ap formula , we can say 96 = 12 + ( n...
sciq
sciq_01_07851
When magma reaches the surface through cracks in the earth's crust, what occurs?
[ "volcanic eruption", "magma eruption", "volcanic explosion", "tsunami" ]
A
All volcanoes share the same basic features. First, mantle rock melts. The molten rock collects in magma chambers that can be 160 kilometers (100 miles) beneath the surface. As the rock heats, it expands. The hot rock is less dense than the surrounding rock. The magma rises toward the surface through cracks in the crus...
sciq
sciq_01_08782
In the past, biologists grouped living organisms into five kingdoms: animals, plants, fungi, protists, and what?
[ "pathogens", "trees", "bacteria", "lizards" ]
C
Carl Woese and the Phylogenetic Tree In the past, biologists grouped living organisms into five kingdoms: animals, plants, fungi, protists, and bacteria. The organizational scheme was based mainly on physical features, as opposed to physiology, biochemistry, or molecular biology, all of which are used by modern systema...
medmcqa
medmcqa_05_03620
Mutation in NPHS 1 gene causes which of the following disease?
[ "Alport syndrome", "Congenital finish type nephritic syndrome", "Focal segmental glomerulonephritis", "nail patella syndrome" ]
B
Ans. B. Congenital Finnish type nephritic syndromeCongenital nephrotic syndrome Finnish type is a genetic condition of the kidney that begins early in development during pregnancy or within the first three months of life. The syndrome is characterized by a group of symptoms, including protein in the urine (proteinuria)...
sciq
sciq_01_06651
What are the two main components in a battery?
[ "anode and a vortex", "vortex and a cathode", "anode and a cathode", "filter and a cathode" ]
C
Zinc is an important component of many kinds of batteries. This metal is mined as zinc compounds, one of which is zinc carbonate. To obtain the pure metal, the ore must go through the following chemical processes:.
sciq
sciq_01_05275
Subshells are subdivisions of what groupings of electrons that can be found surrounding atoms?
[ "isotopes", "orbitals", "analogous", "globals" ]
B
Carbon (atomic number 6) has six electrons. Four of them fill the 1s and 2s orbitals. The remaining two electrons occupy the 2p subshell. We now have a choice of filling one of the 2p orbitals and pairing the electrons or of leaving the electrons unpaired in two different, but degenerate, p orbitals. The orbitals are f...
ARC-Easy
arc_04_00385
Which tool would a student use to measure wind speed?
[ "compass", "barometer", "anemometer", "weather vane" ]
C
null
sciq
sciq_01_02025
What are two types of frozen percipitation?
[ "rain and hail", "ice and frost", "snow and hail", "icycles and icebergs" ]
C
Snow falls when water vapor condenses as ice crystals. The air temperature is below freezing all the way to the ground, so the ice crystals remain frozen. They fall as flakes. Sleet forms when snow melts as it falls through a layer of warm air and then refreezes. It turns into small, clear ice pellets as it passes thro...
medmcqa
medmcqa_05_03696
The term post traumatic epilepsy refers to seizures occurring
[ "Within moments of head injury.", "Within 7 days of head injury.", "Within several weeks to months after head injury.", "Many years after head injury." ]
C
Posttraumatic epilepsy (PTE) is a recurrent seizure disorder that apparently results from injury to the brain. This injury may be due to multiple types of head insults often labled traumatic brain injury (TBI). There is an increase in PTE due to increasing TBI. PTE must be differentiated from posttraumatic seizures (PT...
math_qa
mathqa_03_00610
a and b invests rs . 5000 and rs . 6000 in a business . after 4 months , a withdraws half of his capital and 2 months later , b withdraws one - third of his capital . in what ratio should they share the profits at the end of the year ?
[ "2 : 3", "82 : 31", "32 : 45", "34 : 89" ]
A
"a : b ( 5000 * 4 ) + ( 2500 * 8 ) : ( 6000 * 6 ) + ( 4000 * 6 ) 40000 : 60000 2 : 3 answer : a"
openbookqa
obqa_02_00691
Where does an object feel the least pressure?
[ "a riverbed", "a puddle", "a lake bed", "the ocean floor" ]
B
as an object descends into water , the pressure on that object will increase
ARC-Easy
arc_04_01833
A student recorded the amount of rain that fell in one year in his city. What is the best way for him to organize his information?
[ "diagram", "graph", "journal", "map" ]
B
null
sciq
sciq_01_02463
What phenomenon involves the forcing of a substance into a cell against its concentration gradient?
[ "primary active transport", "secondary transport", "active absorption", "osmosis" ]
A
During active transport, specialized integral membrane proteins recognize the substance and allows it access. Essentially this process is forcing a ion or molecule to cross the membrane when normally it would not. Moving a substance against its concentration gradient is known as primary active transport , and the prote...
math_qa
mathqa_03_01229
a can do a piece of work in 21 days and b in 28 days . together they started the work and b left after 4 days . in how many days can a alone do the remaining work ?
[ "22", "88", "27", "14" ]
D
"let a worked for x days . x / 21 + 4 / 28 = 1 = > x / 21 = 6 / 7 = > x = 18 a worked for 18 days . so , a can complete the remaining work in 18 - 4 = 14 days . answer : d"
medmcqa
medmcqa_05_04826
A 35 year old female complains of clear mucoid non offensive vaginal discharge without pruritus. She is infected due to tubal damage. The cervix appears inflamed on per speculum examination. What is the most likely cause?
[ "Bacterial vaginosis", "Chlamydia", "Gonorrhea", "Trichomonas" ]
B
Ans. is b, i.e. chlamydiaIn the question patient is complaining of vaginal discharge without pruritus. The cervix is also inflamed, i.e. cervicitis is also present and she has a tubal cause of infertility, which means the organism is leading to PID (i.e. rules out Trichomonas and Bacterial Vaginosis).Now we have 2 opti...
sciq
sciq_01_09673
What are materials that have high resistance to electric current called?
[ "motion reducers", "power insulators", "cooling insulators", "electric insulators" ]
D
Materials that have high resistance to electric current are called electric insulators . Wood, rubber, and plastic are examples of electric insulators. Dry air is also an electric insulator.
openbookqa
obqa_02_02866
Rain storms and blizzards can be very dangerous to drive in due to the amount of precipitation they produce, which will do what to the roads visibility?
[ "make it worse", "Make it tasty", "make it better", "make it hot" ]
A
a decrease in visibility while driving can cause people to crash their car
sciq
sciq_01_08755
What is the term for the early growth and development of a plant embryo inside a seed?
[ "rumination", "germination", "fertilization", "secretion" ]
B
A seed is a reproductive structure that contains an embryo and a food supply, called endosperm. Both the embryo and endosperm are enclosed within a tough outer coating, called a hull (or shell). You can see these parts of a seed in Figure below . An embryo is a zygote that has already started to develop and grow. Early...
medmcqa
medmcqa_05_04121
Response to iron in iron deficiency anemia is denoted by -
[ "Restoration of enzymes", "Reticulocytosis", "Increase in iron binding capacity", "Increase in hemoglobin" ]
B
Oral iron therapy is continued long enough both to correct anaemia and to replenish the body iron stores. The response to oral iron therapy is observed by reticulocytosis which begins to appear in 3-4 days with a peak in about 10 days. References: Textbook of Pathology Seventh edition Author: Harsh Mohan Page No.276
sciq
sciq_01_02701
The first period of the paleozoic era was called what?
[ "carboniferous", "permian", "ordovician", "cambrian" ]
D
The first period of the Paleozoic Era was the Cambrian. By the beginning of the Paleozoic, organisms evolved shells. Shells could hold their soft tissues together. Shells could protect them from predators and from drying out. Some organisms evolved external skeletons. These are called exoskeletons . Organisms with hard...
sciq
sciq_01_04724
Along with nerve tissue, what kind of tissue are lecithins and cephalins important constituents of?
[ "skin tissue", "lung tissue", "heart tissue", "brain tissue" ]
D
(a) Amino alcohols are commonly found in phosphoglycerides, which are evident in its structural formula (b). There are two common types of phosphoglycerides. Phosphoglycerides containing ethanolamine as the amino alcohol are called phosphatidylethanolamines orcephalins. Cephalins are found in brain tissue and nerves an...
sciq
sciq_01_00181
What are variants of genes called?
[ "allergens", "antigens", "alleles", "mutations" ]
C
Recall that our DNA is wound into chromosomes . Each of our chromosomes contains a long chain of DNA that encodes hundreds, if not thousands, of genes. Each of these genes can have slightly different versions from individual to individual. These variants of genes are called alleles . Each parent only donates one allele...
math_qa
mathqa_03_01999
a boat moves down stream at the rate of 1 km in 6 minutes and upstream at the rate of 1 km in 10 minutes . the speed of current is
[ "2 kmph", "3 kmph", "4 kmph", "5 kmph" ]
A
if speed ( in kmph ) of the boat = b and current = c , then in downstream time taken ( in hrs . ) = 1 / ( b + c ) = 6 / 60 = 1 / 10 or b + c = 10 - - - ( i ) & in upstream time taken ( in hrs . ) = 1 / ( b - c ) = 10 / 60 = 1 / 6 or b - c = 6 - - - ( ii ) from ( i ) & ( ii ) , b = 8 , c = 2 answer : a
medmcqa
medmcqa_05_03146
For phage typing, how many phages of staphylococcus aureus are used -
[ "12", "15", "20", "23" ]
D
Ans. is 'd' i.e., 23 o Bacteriophage typing of staphylococcus is based on susceptibility of cocci to bacteriphages.o This is carried out by pattern method where a set of 23 standard typing phages of S. aureus is used to type staphylococcal isolates and distinguish them from one another by their patterns of susceptibili...
medmcqa
medmcqa_05_01649
Which of the following is a first-generation Cephalosporin used for surgical prophylaxis?
[ "Ceftriaxone", "Cefoxitin", "Cefazolin", "Cefepime" ]
C
First-Generation Cephalosporins: include - Cefazolin, Cephalexin, Cephradine, Cefadroxil, Cephalothin and Cephapirin Cefazolin is good for skin preparation as it is active against skin infections from S.pyogenes and MRSA. It is administered Intramuscular or Intravenous (i.e Parenteral drug).It is a drug of choice for s...
sciq
sciq_01_02424
If environmental conditions deteriorate, many species can form protective what?
[ "shells", "cysts", "fibers", "proteins" ]
B
medmcqa
medmcqa_05_02870
A 63-year-old man developed a transient episode of vertigo, slurred speech, diplopia, and paresthesia. He is symptom-free now, and clinical examination is entirely normal. His past medical history is significant for hypertension and dyslipidemia. Which of the following is the most likely cause for symptoms?
[ "posterior circulation transient ischemic attack (TIA)", "anterior communicating artery aneurysm", "hypertensive encephalopathy", "pseudobulbar palsy" ]
A
Posterior circulation TIA is suggested by the transient episodes. The basilar artery is formed by the two vertebral arteries and supplies the pons, the midbrain, and the cerebellum. With vertebrobasilar TIAs, tinnitus, vertigo, diplopia, ataxia, hemiparesis, and bilateral visual impairment are common findings.
math_qa
mathqa_03_02873
the ratio of the adjacent angles of a parallelogram is 5 : 10 . also , the ratio of the angles of quadrilateral is 5 : 6 : 7 : 12 . what is the sum of the smaller angle of the parallelogram and the second largest angle of the quadrilateral ?
[ "168 °", "228 °", "144 °", "224 °" ]
C
"the measures of the adjacent angles of a parallelogram add up to be 180 ° given so , 5 x + 10 x = 180 ° or , 15 x = 180 ° or , x = 12 ° hence the angles of the parallelogram are 60 ° and 120 ° further it is given we know sum of all the four angles of a quadrilateral is 360 ° so , 5 y + 6 y + 7 y + 12 y = 360 ° or , 5 ...
sciq
sciq_01_05261
All compounds, whether ionic or covalent, must be what?
[ "electrically neutral", "metallic neutral", "organic neutral", "abnormal neutral" ]
A
When chemists synthesize a new compound, they may not yet know its molecular or structural formula. In such cases, they usually begin by determining itsempirical formula, the relative numbers of atoms of the elements in a compound, reduced to the smallest whole numbers. Because the empirical formula is based on experim...
math_qa
mathqa_03_01791
on dividing 161 by a number , the quotient is 10 and the remainder is 1 . find the divisor .
[ "a", "b", "c", "d" ]
C
"d = ( d - r ) / q = ( 161 - 1 ) / 10 = 160 / 10 = 16 c )"
math_qa
mathqa_03_00624
a , b and c have rs . 500 between them , a and c together have rs . 200 and b and c rs . 360 . how much does c have ?
[ "60", "78", "267", "29" ]
A
"a + b + c = 500 a + c = 200 b + c = 360 - - - - - - - - - - - - - - a + b + 2 c = 560 a + b + c = 500 - - - - - - - - - - - - - - - - c = 60 answer : a"
sciq
sciq_01_00136
What occurs when groups from the same species stop mating because of something other than physical or geographic separation?
[ "sympatric speciation", "invasive speciation", "complementary speciation", "extinction" ]
A
Sympatric speciation occurs when groups from the same species stop mating because of something other than physical or geographic separation. The behavior of two groups that live in the same region is an example of such separation. The separation may be caused by different mating seasons, for example. Sympatric speciati...
sciq
sciq_01_00108
How many different types of taste can be detected by taste buds?
[ "hundreds", "five", "two", "three" ]
B
sciq
sciq_01_07717
What happens to energy in a closed system?
[ "is wasted", "is replicated", "is destroyed", "is conserved" ]
D
Energy is conserved in a closed system. That is, if you add up all the energy of an object(s) at one time it will equal all the energy of said object(s) at a later time. A closed system is a system where no energy is transferred in or out. The total energy of the universe is a constant (i. e. it does not change). The p...
openbookqa
obqa_02_03440
Wide tree rings mean
[ "happiness", "thriving", "money", "magic" ]
B
as the amount of available water decreases , tree-growth rings will become narrower
medmcqa
medmcqa_05_04038
For 1 peptide bond formation how many high energy phosphate bonds are required:
[ "0", "1", "2", "4" ]
D
D i.e. 4
sciq
sciq_01_04617
What theory says stresses build on both sides of a fault?
[ "seismic load theory", "Big Bang theory", "Geiger theory", "elastic rebound theory" ]
D
Elastic rebound theory. Stresses build on both sides of a fault. The rocks deform plastically as seen in Time 2. When the stresses become too great, the rocks return to their original shape. To do this, the rocks move, as seen in Time 3. This movement releases energy, creating an earthquake.
sciq
sciq_01_04167
What type of disease is muscular dystrophy?
[ "a wasting disease", "mutation", "contagious disease", "infectious disease" ]
A
Muscular dystrophy is a term encompassing a variety of muscle wasting diseases. The most common type, Duchenne Muscular Dystrophy (DMD) , affects cardiac and skeletal muscle, as well as some mental functions. DMD is caused by a defective gene for dystrophin, a protein prevalent in skeletal and cardiac muscles. DMD is a...
sciq
sciq_01_07929
If the experimental value is less than the accepted value, the error is what?
[ "effective", "positive", "negative", "caused" ]
C
If the experimental value is less than the accepted value, the error is negative. If the experimental value is larger than the accepted value, the error is positive. Often, error is reported as the absolute value of the difference in order to avoid the confusion of a negative error. The percent error is the absolute va...
sciq
sciq_01_00630
What kind of summers do humid continental climates have?
[ "dry summers", "wet summers", "cold summers", "warm summers" ]
C
Humid continental climates have warm winters and cold summers. Subarctic climates have cool short summers and very cold winters.
medmcqa
medmcqa_05_02978
Which substance enters the urea cycle and gets regenerated
[ "Ornithine", "Aspartate", "Citrulline", "Fumarate" ]
A
Hence, Urea cycle is also called Ornithine cycle. Note: Fumarate does not enter the cycle, it is a by product of the cycle.
medmcqa
medmcqa_05_01353
Which organism has a special predilection towards placenta?
[ "Neisseria meningitides", "Haemophilus influenzae", "Moraxella catarrhalis", "Brucella" ]
D
Brucella has special predilection towards placenta, probably due to the presence in it of erythritol, which has a stimulating effect on brucella in culture Ref: Textbook of microbiology; Ananthanarayan and paniker's; 10th edition; Pg:347
ARC-Easy
arc_04_01573
Vascular plants have tissue called xylem. Which of these is transported by the xylem?
[ "food made by the plant", "water needed by the plant", "pollen for plant reproduction", "carbon dioxide for photosynthesis" ]
B
null
openbookqa
obqa_02_03436
What do humans do to poison the air?
[ "tailoring old clothing items", "using a plastic bottle to create a self water for a plant", "placing plastic into big lakes", "using old T-shirts to make a blanket" ]
C
polluting means something poisonous is added to an environment causing harm to the environment
sciq
sciq_01_03266
What is the type of landscape that occurs at higher latitudes than deserts, has short grasses and low bushes, and are dry because they are in continental interiors?
[ "steppe", "plains", "plateau", "tundra" ]
A
Other dry climates get a little more precipitation. They are called steppes . These regions have short grasses and low bushes ( Figure below ). Steppes occur at higher latitudes than deserts. They are dry because they are in continental interiors or rain shadows.
sciq
sciq_01_02293
What do communication satellites carry and use to provide energy during their missions?
[ "geothermal panels", "batteries", "solar panels", "infrared panels" ]
C
Communications satellites carry solar panels to provide energy for their missions.
math_qa
mathqa_03_02789
a number with an interesting property : when i divide it by 2 , the remainder is 1 . when i divide it by 3 , the remainder is 2 . when i divide it by 4 , the remainder is 3 . when i divide it by 5 , the remainder is 4 . when i divide it by 6 , the remainder is 5 . when i divide it by 7 , the remainder is 6 . when i div...
[ "2588", "2474", "2254", "2519" ]
D
d 2519 the number has to end in 9 . looked brute force for small numbers . 59 and 119 were promising , but no cigar . then looked for agreement among 39 + multiples of 40 , 69 + multiples of 70 and 89 + multiples of 90 smallest one was 2519 .
sciq
sciq_01_09730
What are the most numerous organisms in the world?
[ "primates", "jellyfish", "insects", "reptiles" ]
C
Insects are arthropods in the class Hexapoda. They are the most numerous organisms in the world.
sciq
sciq_01_05168
What mammalian feature serves functions such as filtration and keeping the body warm?
[ "shivering", "sensory organs", "hair", "sweat" ]
C
Hair serves many functions such as acting as a filter and keeping the body warm.
ARC-Challenge
arc_04_02255
Water enters a cell and waste material leaves a cell through the cell membrane. Based on this information, the cell membrane is
[ "semi-permeable.", "transparent.", "rigid.", "impermeable." ]
A
null
sciq
sciq_01_08038
Why can't fungi make their own food like plants do?
[ "no hydrogen", "no cells", "no organelles", "no chloroplasts" ]
D
Fungi cannot make their own food like plants can, since they do not have chloroplasts and cannot carry out photosynthesis. Fungi are more like animals because they are heterotrophs, as opposed to autotrophs, like plants, that make their own food. Fungi have to obtain their food, nutrients and glucose, from outside sour...
medmcqa
medmcqa_05_04047
Culex tritaenorrhyncus transmits -
[ "Dengue fever", "Yellow fever", "KFD", "Japanese encephalitis" ]
D
Vector Diseases transmitted Culex Bancroftian filariasis JE West Nile Fever Anopheles Malaria Filaria (outside India) Aedes Yellow fever Dengue Chikungunya Rift Valley Fever Mansonia Brugian filariasis and Chikungunya REF: PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE, 25TH EDITION, PG NO. 832
openbookqa
obqa_02_02382
Kettles are lakes which are formed when chunks of glaciers
[ "freeze", "drown", "float", "dissipate" ]
D
a kettle is formed when chunks of ice left by glaciers melt
sciq
sciq_01_08853
Are the majority of archaea chemotrophs or photosynthetic?
[ "photosynthetics", "autotrophs", "chemotrophs", "neither" ]
C
Most archaea are chemotrophs and derive their energy and nutrients from breaking down molecules in their environment. A few species of archaea are photosynthetic and capture the energy of sunlight. Unlike bacteria, which can be parasites and are known to cause a variety of diseases, there are no known archaea that act ...
sciq
sciq_01_00145
When a series of measurements is precise but not what, the error is usually systematic?
[ "accurate", "length", "color", "velocity" ]
A
0 .033 g 1 .117 g × 100 = 3 .0% When a series of measurements is precise but not accurate, the error is usually systematic. Systematic errors can be caused by faulty instrumentation or faulty technique. The difference between accuracy and precision is demonstrated in Skill Builder ES7.
sciq
sciq_01_08188
What direction are sediments deposited?
[ "vertically", "diagonally", "horizontally", "magnetic poles" ]
C
Sediments are deposited horizontally so sedimentary rock layers are originally horizontal.
sciq
sciq_01_11377
The process of moving from areas of high amounts to areas of low amounts is called what?
[ "transfer", "deposition", "diffusion", "filtration" ]
C
They will all blend together. The dyes will move through the water until an even distribution is achieved. The process of moving from areas of high amounts to areas of low amounts is called diffusion.
sciq
sciq_01_00441
What term describes the orientation of a body lying face-down?
[ "Under", "Diagnal", "prone", "Supine" ]
C
A body that is lying down is described as either prone or supine. Prone describes a face-down orientation, and supine describes a face up orientation. These terms are sometimes used in describing the position of the body during specific physical examinations or surgical procedures.
sciq
sciq_01_10574
What element, which often forms polymers, has a unique ability to form covalent bonds with many other atoms?
[ "iron", "oxygen", "hydrogen", "carbon" ]
D
Carbon has a unique ability to form covalent bonds with many other atoms. It can bond with other carbon atoms as well as with atoms of other elements. Because of this ability, carbon often forms polymers. A polymer is a large molecule that is made out of many smaller molecules that are joined together by covalent bonds...
sciq
sciq_01_10377
Where do most cubozoans live?
[ "arctic oceans", "lakes", "rivers", "tropical oceans" ]
D
sciq
sciq_01_05597
Which types of muscles cause bones to move when they retract?
[ "active muscles", "working muscles", "bone muscles", "skeletal muscles" ]
D
Skeletal muscles are attached to the skeleton and cause bones to move when they contract.
openbookqa
obqa_02_00689
A magnifying glass would be useless in viewing?
[ "tadpole", "ant", "sand grain", "elephant" ]
D
magnifying glass is used to see small things by making objects appear bigger