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7.76k
medmcqa
medmcqa_05_02267
WHO Rose questionnaire is for
[ "DVT assessment", "Alcohol addiction", "Angina assessment", "Arrhythmia assessment" ]
C
.
sciq
sciq_01_02334
What do you call a group of cells of the same kind that performs the same function?
[ "organ system", "nucleus", "tissue", "molecule" ]
C
Specialized cells may be organized into tissues. A tissue is a group of cells of the same kind that performs the same function. For example, muscle cells are organized into muscle tissue. The function of muscle tissue is to contract in order to move the body or its parts.
medmcqa
medmcqa_05_00215
Bergmeister papilla are present on the:
[ "Anterior corneal surface", "Near the optic disc", "Anterior lens surface", "Posterior lens surface" ]
B
Ans. Near the optic disc
math_qa
mathqa_03_01793
how much interest will $ 10,000 earn in 3 months at an annual rate of 6 % ?
[ "$ 250", "$ 150", "$ 450", "$ 550" ]
B
"soln : - 6 months = 1 / 4 of year ; 6 % = 6 / 100 = 3 / 50 ; $ 10,000 ( principal ) * 3 / 50 ( interest rate ) * 1 / 4 ( time ) = $ 150 . answer : b"
medmcqa
medmcqa_05_04724
Best treatment for menigioma with low recurrence rate is
[ "Tumour excision with cyst of dura mater removal", "Excision surgery followed by radiotherapy", "Chemotherapy", "Preop embolization + Excision surgery" ]
A
Surgical treatment should be, wherever possible, total excision. If this includes the site of dural attachment, the recurrence rate is less than 10 per cent. Incomplete excision of the dural attachment will result in a recurrence rate of between 20 and 30 per cent. Subtotal excision will result in 40 pet cent showing p...
sciq
sciq_01_00205
What two ways may light be transmitted?
[ "absorption and refraction", "refracted or scattered", "reflected or refracted", "magnified or scattered" ]
B
Transmitted light may be refracted or scattered. When does each process occur?.
math_qa
mathqa_03_01258
a light has a rating of 110 watts , it is replaced with a new light that has 30 % higher wattage . how many watts does the new light have ?
[ "143", "145", "156", "134" ]
A
"final number = initial number + 30 % ( original number ) = 110 + 30 % ( 110 ) = 110 + 33 = 143 . answer a"
openbookqa
obqa_02_03515
If a person is going to be in an area with acid rain, the organs in the body can be unharmed because of
[ "outer organ protection", "being given immunity", "using sunscreen", "taking vitamins" ]
A
skin is used for protecting the body from harmful substances
sciq
sciq_01_06586
The earliest cells were prokaryotes, surrounded by a cell membrane but lacking which key structure?
[ "lysosomes", "nucleus", "ribosomes", "mitochondria" ]
B
The first organisms were made of only one cell ( Figure below ). The earliest cells were prokaryotes . Prokaryotic cells are surrounded by a cell membrane. They do not have a nucleus. Their organelles are free in the cell. The cells get their nutrients directly from the water they live in. The cells need to use these n...
sciq
sciq_01_10319
What term is used to express the measurement of how high land is above sea level?
[ "distance", "latitude", "elevation", "knots" ]
C
Elevation measures how high land is above sea level. It gets colder as you go higher above sea level, which is why you see snow-capped mountains.
math_qa
mathqa_03_04370
if x + y = 14 , x - y = 60 , for integers of x and y , x = ?
[ "37", "35", "25", "20" ]
A
"x + y = 14 x - y = 60 2 x = 74 x = 37 answer is a"
ARC-Easy
arc_04_01435
How does an ecosystem benefit when leaves fall from a tree and decompose on the soil?
[ "Nutrients are released into the soil.", "Soil erosion decreases.", "Carbon dioxide is absorbed by the soil.", "Soil temperature decreases." ]
A
null
openbookqa
obqa_02_04021
I can use a ruler to measure
[ "The smell of popcorn", "the space between my toes", "The length of air", "how angry I am" ]
B
a ruler is used for measuring the length of an object
openbookqa
obqa_02_01380
Alternative fuel is usually a renewable what?
[ "sound", "meal", "drink", "asset" ]
D
alternative fuel is usually a renewable resource
math_qa
mathqa_03_04026
if a man buys 1 liter of milk for 12 rs . and mixes it with 20 % water and sells it for 15 rs then what is the % age of gain . . .
[ "30", "40", "50", "60" ]
C
quantity after adding 20 % water = 1.2 liter sp of 1.2 lit . @ 15 rs . / liter = 15 * 1.2 = 18 rs cp = 12 rs / lit . % profit = 100 * ( 18 - 12 ) / 12 = 50 answer : c
medmcqa
medmcqa_05_01938
Dalrymple's sign is seen in-
[ "Thyroid ophthalmopathy", "Orbital cellulitis", "Choroidal melanoma", "Posterior vitreal detachment" ]
A
*Impoant signs of thyroid ophthalmopathy:- 1)Bilateral exophthalmos 2)Dalrymple's sign 3)Von Graefe's sign 4)Stellwag's sign 5)Mobius's sign 6)Jellinek's sign 7)Joffroy's sign 8)Enroth's sign 9)Grifford's sign Ref: Yanuff & Duker 3rd/e p.786
math_qa
mathqa_03_02779
elena purchased brand x pens for $ 4.00 apiece and brand y for $ 2.20 apiece . if elena purchased a total of 12 of these pens for $ 42.00 , how many brand x pens did she purchase ?
[ "4", "5", "6", "7" ]
C
4 x + 2.8 y = 42 - - > multiply by 2.5 ( to get the integers ) - - > 10 x + 7 y = 105 - - > only one positive integers solutions x = 6 and y = 5 ( how to solve : 7 y must have the last digit of 5 in order the last digit of the sum to be 5 ) . answer : c .
sciq
sciq_01_07758
What do we call any way that animals act, either alone or with other animals.
[ "animal communication", "typical behavior", "animal behavior", "animal habits" ]
C
Animal behavior is any way that animals act, either alone or with other animals.
math_qa
mathqa_03_01673
a dishonest shopkeeper professes to sell pulses at the cost price , but he uses a false weight of 960 gm . for a kg . his gain is … % .
[ "4.16 %", "5.36 %", "4.26 %", "6.26 %" ]
A
"his percentage gain is 100 * 40 / 960 as he is gaining 40 units for his purchase of 960 units . so 4.16 % . answer : a"
math_qa
mathqa_03_03180
the sum of money will be double itself in 10 years and simple interest find rate of interest ?
[ "10 %", "15 %", "20 %", "25 %" ]
A
t = 10 years p = principle amount = x a = total amount = 2 x si = simple interest = a - p = 2 x - x = x r = 100 si / pt = 100 x / 10 x = 10 % answer is a
medmcqa
medmcqa_05_02400
Establishment of fetoplacental circulation seen at
[ "11 to 13 days", "20 to 22 days", "7 days", "25 to 26 days" ]
B
Ref. DC Dutta's Textbook of Obstetrics. Pg 36   Implantation of 12-16 cell stage occurs in the endometrium on the anterior and posterior wall of the body near the fundus on the 6th day following fertilization. Then the deeper penetration of the human blastocyst is called interstitial implantation, which happens by app...
sciq
sciq_01_09177
What is the term for a galaxy that is a rotating disk of stars and dust?
[ "spiral galaxy", "cosmic galaxy", "Milky Way", "nebula" ]
A
A spiral galaxy is a rotating disk of stars and dust. In the center is a dense bulge of material. Several spiral arms come out from the center. Spiral galaxies have lots of gas and dust and many young stars. The image below ( Figure below ) shows a spiral galaxy from the side. You can see the disk and central bulge.
ARC-Easy
arc_04_01780
In what way does society benefit from research on diseases?
[ "New illnesses will develop.", "Doctors will visit their patients at home.", "More families will move closer to hospitals.", "Many illnesses will be prevented or cured." ]
D
null
math_qa
mathqa_03_04861
a multiple choice test consists of 4 questions , and each question has 5 answer choices . in how many f ways can the test be completed if every question is unanswered ?
[ "24", "120", "625", "720" ]
C
"5 choices for each of the 4 questions , thus total f of 5 * 5 * 5 * 5 = 5 ^ 4 = 625 ways to answer all of them . answer : c ."
ARC-Easy
arc_04_00218
Minerals are formed by which process?
[ "magma cooling", "fault lines moving", "metamorphosis", "sedimentation" ]
A
null
ARC-Challenge
arc_04_02966
What precaution must be taken by students when making observations of the Sun?
[ "Use only new equipment.", "Use a very strong telescope.", "Project image onto a piece of cardboard.", "Look at the Sun only in the morning." ]
C
null
ARC-Easy
arc_04_01720
Where does a landslide begin?
[ "a low hill", "a plain", "a mountain", "a basin" ]
C
null
sciq
sciq_01_06481
What do you call the process of a solid becoming a liquid?
[ "boiling", "vaporizing", "melting", "freezing" ]
C
Substances can change phase—often because of a temperature change. At low temperatures, most substances are solid; as the temperature increases, they become liquid; at higher temperatures still, they become gaseous. The process of a solid becoming a liquid is called melting (an older term that you may see sometimes is ...
medmcqa
medmcqa_05_00490
Knee with leg x- ray of an adolescent boy is shown. Probable diagnosis:
[ "Chondromyxoid fibroma", "Osteosarcoma", "Bone cyst with fracture", "Osteitis Fibrosis cystica" ]
A
Chondromyxoid Fibroma Disease of adolescent Knee X-ray Sclerotic lesion around the coex in the tibia. . Small eccentric lytic lesion which lie parallel to the long axis of the bone. * Bone cyst with fracture will show a larger lesion and is mostly unilateral. * Osteitis Fibrosis cystica will present with multiple lesio...
medmcqa
medmcqa_05_02823
Treatment of choice for salmonella typhi ?
[ "Cephalexin", "Gentamicin", "Co-trimoxazole", "Ciprofloxacin" ]
D
Ans. is `d' i.e., Ciprofloxacin Treatment of Typhoid fever o Empirical treatment ---> Ceftriaxone, Azithromycin. o Fully susceptible ---> Ciprofloxacin (First line), Amioxicil lin (second line), Chloramphenicol, Trimethoprim - Sulfamethoxazole. o Multidrug resistant ---> Ciprofloxacin, Ceptriaxone, Azithromycin. o Nali...
sciq
sciq_01_00269
Which kind of genetics approach involves mutating or deleting genes provides researchers with clues about gene function?
[ "reverse genetics", "possible genetics", "impossible genetics", "inverse genetics" ]
A
Watch this short video (http://openstaxcollege. org/l/transgenic) explaining how scientists create a transgenic animal. Although the classic methods of studying the function of genes began with a given phenotype and determined the genetic basis of that phenotype, modern techniques allow researchers to start at the DNA ...
sciq
sciq_01_07512
Hydrocarbons are combined with oxygen in a series of enzymatic steps to product water, carbon dioxide, and energy, which is stored in the form of what?
[ "energy", "reactive molecules", "dormant molecules", "light" ]
B
The process of cellular respiration can be thought of as a highly controlled version of a combustion reaction. We do not literally burn hydrocarbons in our body, but the overall reactants and products are the same. Hydrocarbons, such as sucrose (C 12 H 22 O 11 ), are combined with oxygen in a series of enzymatic steps ...
sciq
sciq_01_00459
What is the si unit for pressure?
[ "laurent", "watt", "pascal", "le" ]
C
Summary Four quantities must be known for a complete physical description of a sample of a gas: temperature, volume, amount, and pressure. Pressure is force per unit area of surface; the SI unit for pressure is the pascal (Pa), defined as 1 newton per square meter (N/m2). The pressure exerted by an object is proportion...
sciq
sciq_01_05361
The electron transport chains are located on the inner membrane of which organelle?
[ "mitochondrion", "axon", "chloroplast", "lysosome" ]
A
High-energy electrons are released from NADH and FADH 2 , and they move along electron transport chains, like those used in photosynthesis. The electron transport chains are on the inner membrane of the mitochondrion. As the high-energy electrons are transported along the chains, some of their energy is captured. This ...
math_qa
mathqa_03_03772
how many of the positive divisors of 360 are also multiples of 4 not including 360 ?
[ "8", "11", "12", "15" ]
B
"360 = 2 ^ 5 * 3 * 5 = ( 4 ) * 2 * 3 ^ 2 * 5 besides ( 4 ) , the exponents of 2 , 3 , and 5 are 1 , 2 , and 1 . there are ( 1 + 1 ) ( 2 + 1 ) ( 1 + 1 ) = 12 ways to make multiples of 4 . we must subtract 1 because one of these multiples is 360 . the answer is b ."
sciq
sciq_01_05134
What is a factor in determining weight but not mass?
[ "gravity", "function", "material", "location" ]
D
Mass is independent of location, while weight depends on location.
openbookqa
obqa_02_03585
If a bird has a larger beak than its friends, it likely had
[ "mother without a beak", "father with a long trunk", "parents with smaller beaks", "ancestors with similar beaks" ]
D
the thickness of the parts of an organism is an inherited characteristic
sciq
sciq_01_03485
The kidney glomerulus filters blood mainly based on particle size to produce a filtrate lacking cells or large what?
[ "carbohydrates", "proteins", "lipids", "steroids" ]
B
CHAPTER REVIEW 25.1 Physical Characteristics of Urine The kidney glomerulus filters blood mainly based on particle size to produce a filtrate lacking cells or large proteins. Most of the ions and molecules in the filtrate are needed by the body and must be reabsorbed farther down the nephron tubules, resulting in the f...
openbookqa
obqa_02_02117
Which of the following areas would most likely contain a sandbar?
[ "the bottom of a pond", "where water continuously moves sand and small rocks downstream", "a school play area", "a car manufacturing plant" ]
B
a sandbar is formed by water moving sediment downstream
math_qa
mathqa_03_04009
a box contain red , blue and green colored balls . the number of red balls is 80 and the number of blue balls is 60 . the number of green balls subtracted from the number of red balls is the same as the number of green balls added with the number of blue balls . then the number of green balls is ?
[ "80", "green balls = 70", "60", "85" ]
B
answer let the number of green balls be x . then , x - 60 = 80 - x â ‡ ’ 2 x = 80 + 60 = 140 â ‡ ’ 2 x = 140 â ˆ ´ x = 70 correct option : b
medmcqa
medmcqa_05_03303
Liver in hemochromatosis is stained by ?
[ "Masson Fontana", "Prussain blue", "Masson trichrome", "Congo red" ]
B
Ans. is 'b' i.e., Prussian blueo Fontana-Masson method : most commonly used. It relies upon the melanin granules to reduce ammoniacal silver nitrate.o Ped's iron stain/Prussian blue method : It is the classic method for demonstrating iron in tissues. The section is treated with dilute hydrochloric acid to release ferri...
sciq
sciq_01_10771
What is a thin layer of gas that surrounds earth called?
[ "the cloud cover", "the wind cycle", "the atmosphere", "the dioxide" ]
C
The atmosphere is a thin layer of gas that surrounds Earth. Climatologists study the atmosphere. These scientists work to understand the climate as it is now. They also study how climate will change in response to global warming.
medmcqa
medmcqa_05_01223
What is the average gain in lenght in 4 years?
[ "25 cm", "50 cm", "75 cm", "100 cm" ]
B
Expected height = Age (yr) × 6 + 77
openbookqa
obqa_02_03947
human planet revolves around the sun in
[ "a day", "a week", "365 earthen rotations", "a eon" ]
C
the Earth revolves around the sun
openbookqa
obqa_02_03305
If a plane is landing on a strip where someone is standing, the plane's blinking will look
[ "more intense", "duller", "more distant", "more dim" ]
A
as a source of light becomes closer , that source will appear brighter
ARC-Easy
arc_04_01600
One hundred grams of water and 100 grams of vegetable oil are heated in identical containers at 70°C for 5 minutes. Their temperatures at the end of 5 minutes are different due to the difference in which property?
[ "volume", "specific heat", "conductivity", "chemical energy" ]
B
null
medmcqa
medmcqa_05_04819
Dermatological manifest of IBD:
[ "Pyoderma gangrenosum", "Necrolytic migratory erythema", "Impetigo", "Psoriasis" ]
A
Ans. (a) Pyoderma gangrenosumRef: Sabiston 20th edition, Page 1341* Skin manifests in ulcerative colitis:* Most common erythema nodosum (In 10-15% cases)* Pyoderma gangrenosum (Most common site pretibial region--erythematous plaque)
medmcqa
medmcqa_05_04527
An infant presents with mild anemia, jaundice, and splenomegaly. A complete blood count with differential reveals spherocytosis; the reticulocyte count is elevated. The parents state that several relatives have also suffered from a similar illness.The infant's condition is most likely caused by defective?
[ "Clathrin", "Connexon", "Dynein", "Spectrin" ]
D
The infant is suffering from hereditary spherocytosis, a disease that can result from defective erythrocyte cytoskeletal proteins such as spectrin or ankyrin. Spectrin is a cytoskeletal protein in the erythrocyte that binds to the ankyrin/band 3 protein complex. It also binds to a protein 4.1/actin complex to form a st...
sciq
sciq_01_03088
Minerals that are not pure elements are made of what?
[ "isotopes", "metalloids", "noble gases", "chemical compounds" ]
D
Minerals that are not pure elements are made of chemical compounds. For example, the mineral quartz is made of the compound silicon dioxide, or SiO 2 . This compound has one atom of the element silicon for every two atoms of the element oxygen.
sciq
sciq_01_05661
One molecule of carbon dioxide consists of 1 atom of carbon and 2 atoms of what element?
[ "oxygen", "nitrogen", "hydrogen", "methane" ]
A
A molecular formula of the compound carbon dioxide is CO 2 . One molecule of carbon dioxide consists of 1 atom of carbon and 2 atoms of oxygen. We can calculate the mass of one molecule of carbon dioxide by adding together the masses of 1 atom of carbon and 2 atoms of oxygen.
sciq
sciq_01_06027
What diagnostic technology uses high-frequency vibrations transmitted into any tissue in contact with the transducer?
[ "laser", "sonar", "radiation", "ultrasound" ]
D
Ultrasound in Medical Diagnostics When used for imaging, ultrasonic waves are emitted from a transducer, a crystal exhibiting the piezoelectric effect (the expansion and contraction of a substance when a voltage is applied across it, causing a vibration of the crystal). These highfrequency vibrations are transmitted in...
math_qa
mathqa_03_01949
if f ( f ( n ) ) + f ( n ) = 2 n + 3 , f ( 0 ) = 1 then f ( 2012 ) = ?
[ "2013", "2088", "270", "1881" ]
A
"f ( f ( 0 ) ) + f ( 0 ) = 2 ( 0 ) + 3 ⇒ ⇒ f ( 1 ) = 3 - 1 = 2 , f ( 1 ) = 2 f ( f ( 1 ) ) + f ( 1 ) = 2 ( 1 ) + 3 ⇒ ⇒ f ( 2 ) = 5 - 2 = 3 , f ( 2 ) = 3 f ( f ( 2 ) ) + f ( 2 ) = 2 ( 2 ) + 3 ⇒ ⇒ f ( 3 ) = 7 - 3 = 4 , f ( 3 ) = 4 . . . . . . . . . . . . . . f ( 2012 ) = 2013 ans : a"
sciq
sciq_01_08301
What does a healthy immune system fight off?
[ "respiratory and other dieases", "microorganisms and other dieases", "infections and other dieases", "bacteria and viruses" ]
C
Eat well, get enough sleep, and be active every day. These healthy lifestyle choices will help keep your immune system healthy so it can fight off respiratory infections and other diseases.
math_qa
mathqa_03_02502
a , b and c can do a piece of work in 24 days , 30 days and 60 days respectively . they began the work together but c left 4 days before the completion of the work . in how many days was the work completed ?
[ "10 days", "11 days", "13 days", "21 days" ]
B
one day work of a , b and c = 1 / 24 + 1 / 30 + 1 / 60 = 11 / 120 work done by a and b together in the last 4 days = 4 * ( 1 / 24 + 1 / 30 ) = 3 / 10 remaining work = 7 / 10 the number of days required for this initial work = 7 days . the total number of days required = 4 + 7 = 11 days . answer : b
sciq
sciq_01_08333
What surrounds the lungs in a thoracic cavity?
[ "single membrane", "water", "double membrane", "calcium" ]
C
sciq
sciq_01_00872
What is used to fluoridate drinking water to promote dental health
[ "carbon fluoride", "calcium fluorine", "calcium fluoride", "carbon fluorine" ]
C
Calcium fluoride is used to fluoridate drinking water to promote dental health. Crystalline CaF 2 (d = 3.1805 3.
sciq
sciq_01_06580
Metabolism is the sum of all catabolic and which other reactions in the body?
[ "inbolic", "abolic", "systic", "anabolic" ]
D
CHAPTER REVIEW 24.1 Overview of Metabolic Reactions Metabolism is the sum of all catabolic (break down) and anabolic (synthesis) reactions in the body. The metabolic rate measures the amount of energy used to maintain life. An organism must ingest a sufficient amount of food to maintain its metabolic rate if the organi...
sciq
sciq_01_10773
What do you call a system that has one or more planets orbiting one or more stars?
[ "galaxy", "molecular system", "solar system", "atom" ]
C
Since the early 1990s, astronomers have discovered other solar systems. A solar system has one or more planets orbiting one or more stars. We call these planets “extrasolar planets,” or exoplanets . They are called exoplanets because they orbit a star other than the Sun. As of April 2014, more than 4,600 exoplanets hav...
openbookqa
obqa_02_02219
A person who hunts lions down for trophy prizes contributes to their species'
[ "growth", "encouragement", "consideration", "ruination" ]
D
harming an animal species causes that animal 's population to decrease
openbookqa
obqa_02_00953
A ship navigates with a magnetic compass because it is
[ "unpredictable", "waterproof", "tradition", "predictable" ]
D
when the needle of a compass lines up with Earth 's magnetic poles , the needle points north
math_qa
mathqa_03_02974
a family consists of two grandparents , two parents , and 3 grandchildren . the average age of the grandparents is 64 years , the average age of the parents is 39 years , and the average age of the grandchildren is 6 years . what is the average age ( in years ) of the family ?
[ "31", "32", "33", "34" ]
B
total age of the grandparents = 64 ã — 2 = 128 total age of the parents = 39 ã — 2 = 78 total age of the grandchildren = 6 ã — 3 = 18 average age of the family = ( 128 + 78 + 18 ) / 7 = 224 / 7 = 32 years the answer is b .
medmcqa
medmcqa_05_02984
A 55 yr old male, with uncontrolled diabetes mellitus and hypeension, developed severe airborne contact dermatitis. The most appropriate drug for his treatment would be:
[ "Systematic coicosteroids", "ketoconazole", "Azathioprine", "Cyclosporine" ]
C
Case of contact dermatitis - Systematic coicosteroids cannot be used because pt. has DM & steroid cause impairment of blood glucose levels in well-controlled diabetics. Cyclosporine cannot be used as pt. is Hypeensive and it is a nephrotoxic drug. ketoconazole is antifungal drug. Therefore, Azathioprine (immunosuppress...
sciq
sciq_01_00548
What do you call the ability to sense sound energy and perceive sound?
[ "hearing", "sensory deprivation", "echolocation", "tuning" ]
A
Hearing is the ability to sense sound energy and perceive sound. The ear is the organ that senses sound and allows us to hear. Damage to structures of the ear may cause hearing loss. Total hearing loss is called deafness.
medmcqa
medmcqa_05_01506
Duchenne muscular dystrophy is inherited as -
[ "X linked", "Autosomal dominant", "Autosomal recessive", "Codominant" ]
A
Ans. is 'a' i.e., X linked o The two most common forms of muscular dystrophy are X-linked:- Duchenne muscular dystrophy and- Becker muscular dvstrophv.X-linked Recessive disordersMusculoskeletalo Duchene muscular dystrophyo Chronic gramilomatus diseaseHematologicalo Hemophilia A & Bo G-6-PD deficiencyImmuneo Agammaglob...
sciq
sciq_01_06571
Defined as total distance traveled divided by elapsed speed, average speed is a scalar quantity that does not include what?
[ "direction", "shift", "pressure", "size" ]
A
• Average speed is the total distance traveled divided by the elapsed time. (Average speed is not the magnitude of the average velocity. ) Speed is a scalar quantity; it has no direction associated with it.
ARC-Easy
arc_04_00381
What is the relationship between tissues and organs?
[ "Organs are made from one type of tissue.", "Tissues are made from one type of organ.", "Tissues are made from different types of organs.", "Organs are made from different types of tissues." ]
D
null
sciq
sciq_01_07072
Solar and wind are still expensive compared to what?
[ "electricity", "fossil fuels", "coal fuels", "batteries" ]
B
Solar and wind are still expensive relative to fossil fuels. The technology needs to advance so that the price falls.
sciq
sciq_01_07928
Each myofibril is made up of two types of proteins, called actin and what?
[ "myosin", "Fatty Acid", "elongation", "dynein" ]
A
Each myofibril is made up of two types of proteins, called actin and myosin. These proteins form thread-like filaments.
sciq
sciq_01_06849
The oxidation of an alcohol can produce either an aldehyde or what?
[ "ester", "enzyme", "ketone", "amine" ]
C
The oxidation of an alcohol can produce either an aldehyde or a ketone. Ethanol can be oxidized in the laboratory through a heating process combined with the addition of an oxidizing agent such as the dichromate ion, which catalyzes the reaction in an acidic solution. The reaction produces the aldehyde ethanal (acetald...
sciq
sciq_01_09278
What is it called when pollen from one plant fertilizes another plant of the same species?
[ "cross-pollination", "cross - vegetation", "cross-typing", "cross-breeding" ]
A
Pea plants are naturally self-pollinating. In self-pollination , pollen grains from anthers on one plant are transferred to stigmas of flowers on the same plant. Mendel was interested in the offspring of two different parent plants, so he had to prevent self-pollination. He removed the anthers from the flowers of some ...
openbookqa
obqa_02_02987
Which of the following is most likely to occur?
[ "a felled tree rots", "a stone pile rots", "a living tree rots", "a pile of sand rots" ]
A
dead organisms rot
sciq
sciq_01_01731
What is the major selective advantage of myelination?
[ "storage capacity", "potentiation", "heat regulation", "space efficiency" ]
D
ARC-Challenge
arc_04_03206
Electric circuits provide energy for lightbulbs. Which of these prevents the flow of electrons?
[ "a circuit that is closed", "a series circuit", "a circuit that is open", "a parallel circuit" ]
C
null
sciq
sciq_01_01990
What type of species have a large effect on the balance of organisms in an ecosystem?
[ "producers", "decomposers", "keystone", "secondary consumers" ]
C
Predators play an important role in an ecosystem. For example, if they did not exist, then a single species could become dominant over others. Grazers on a grassland keep grass from growing out of control. Predators can be keystone species . These are species that can have a large effect on the balance of organisms in ...
sciq
sciq_01_07593
In a chemical reaction, what, in general, comes together in order to form a product?
[ "liquids", "reactants", "gases", "propellants" ]
B
Bonds break and reform during chemical reactions. Reactants and products contain the same atoms, but they are rearranged during the reaction, so reactants and products are different substances.
math_qa
mathqa_03_02221
find the principle on a certain sum of money at 5 % per annum for 2 2 / 5 years if the amount being rs . 1344 ?
[ "1000", "2217", "1200", "2777" ]
C
"1344 = p [ 1 + ( 5 * 12 / 5 ) / 100 ] p = 1200 answer : c"
math_qa
mathqa_03_03751
the number of students in each section of a school is 24 . after admitting new students , three new sections were started . now , the total number of sections is 16 and there are 21 students in each section . the number of new students admitted is :
[ "12'", "42'", "24'", "28'" ]
C
original number of sections = 16 - 3 = 13 original number of students = 24 x 13 = 312 present number of students = 21 x 16 = 336 number of new students admitted = 336 - 312 = 24 so the answer is option c ) 24 .
sciq
sciq_01_06237
The majoirty of modern gymnosperms belong to what group, which includes pine trees?
[ "Pinophytes", "conifers", "stems", "clusters" ]
B
There are only about 1,000 living species of gymnosperms, whereas there are hundreds of thousands of living species of angiosperms. Living gymnosperms are typically classified in the divisions described in the Table below . Most modern gymnosperms are trees with woody trunks. The majority are conifers such as pine tree...
sciq
sciq_01_08039
The vestibulocochlear nerve is responsible for the senses of hearing and what else?
[ "awareness", "smell", "sight", "balance" ]
D
motor nucleus), and their target (sensory nucleus or skeletal muscle). They are listed here with a brief explanation of each nerve (Figure 13.23). The olfactory nerve and optic nerve are responsible for the sense of smell and vision, respectively. The oculomotor nerve is responsible for eye movements by controlling fou...
openbookqa
obqa_02_02585
Which of these describes a living thing?
[ "one thing doing nothing", "large body of inanimate material", "many small things working together", "large lake of moving water" ]
C
a living thing is made of cells
ARC-Challenge
arc_04_02495
Which is NOT a fossil fuel?
[ "Coal", "Oil", "Wood", "Natural gas" ]
C
null
math_qa
mathqa_03_04304
a sum of money lent at compound interest for 2 years at 20 % per annum would fetch rs . 482 more , if the interest was payable half yearly than if it was payable annually . the sum is
[ "200000", "20000", "200029", "288778" ]
B
explanation : let sum = rs . x c . i . when compounded half yearly = c . i . when compounded annually = = > x = 20000 answer : b ) 20000
medmcqa
medmcqa_05_02724
Tuberculin testing done at -
[ "Dorsum of left arm", "Dorsum of right arm", "Ventral aspect of left forearm", "Ventral aspect right forearm." ]
C
Ans. is 'c' i.e., Ventral aspect of left forearm o In tuberculin test, injection is given intradermally on flexor (ventral) surface of left forearm, mid-wav between elbow & wrist.Intradermal injection of PPDon flexor aspect of forearm | Examined at 48-72 hours |||Induration > 10 mmInduration < 5 mmInduration 6-9 mm|||P...
ARC-Challenge
arc_04_02465
From Earth, we see the sun in the day sky and other stars in the night sky. Nighttime stars look like tiny points of light. Which statement explains why nighttime stars appear so much smaller than the sun?
[ "The stars are much smaller.", "The sky is much darker at night.", "The stars are much farther away.", "The moon blocks out most starlight." ]
C
null
medmcqa
medmcqa_05_04088
Tachyphylaxis is an adverse effect of
[ "Betaxalol", "Latanoprost", "Dipevifrine", "Dorzolamide" ]
C
Dipevifrine, an a adrenergic agonist has adverse effect of Tachyphylaxis.
sciq
sciq_01_01337
Organs are made up of two or more types of what?
[ "tissues", "muscles", "fluids", "bones" ]
A
Bones come in many different shapes and sizes, but they are all made of the same materials. Bones are organs, and recall that organs are made up of two or more types of tissues.
sciq
sciq_01_02794
Every peripheral nerve is connected directly or indirectly to what?
[ "the functional cord", "the umbilical chord", "the optimal cord", "the spinal cord" ]
D
The blue lines in this drawing represent nerves of the peripheral nervous system. Every peripheral nerve is connected directly or indirectly to the spinal cord. Notice the thick sciatic nerve. It is the longest (and thickest) nerve in the body, running from the lower region of the spinal cord to just above the knee.
medmcqa
medmcqa_05_04331
Which nerve does not supply gluteal region
[ "Sciatic nerve", "Superior gluteal nerve", "Inferior gluteal nerve", "Nerve to obturator internus" ]
A
Ans. a. Sciatic nerveSciatic nerve does not supply gluteal region.Superior gluteal nerve supplies Gluteus medius and minimusdeg and tenor fascia lata. Inferior gluteal nerve supplies Gluteus maximusdeg.Nerve to obturator internus supplies Obturator internus and Gamellus superiordeg.Muscles of Gluteal regionNerve Supply...
medmcqa
medmcqa_05_03848
Late effects of radiation thearpy – a) Mucositisb) Enteritisc) Nausea and vomitingd) Pneumonitise) Somatic mutations
[ "abcd", "bcde", "acde", "abde" ]
D
Mucositis (which includes enteritis), pneumonitis and mutations are delayed effect of radiation.
medmcqa
medmcqa_05_02298
A infant with cleft lip, cleft palate, polydactly, microcephaly with holoprosencephaly, ectodermal scalp defect is suffering from:
[ "Trisomy 21", "Trisomy 18", "Trisomy 13", "Turner" ]
C
Trisomy 13 Cleft lip, cleft palate, scalp defects suggest Trisomy 13 or Patau syndrome. Trisomy 13 and Trisomy 18 share several clinical features. The highest discriminatory values are for ectodermal scalp defects and harelip and cleft palate in trisomy 13 and elongated skull and simple arches on all digits for trisomy...
medmcqa
medmcqa_05_03920
The process by which fusion of pa of a cell membrane occurs is/are
[ "Cell division", "Endocytosis", "Exocytosis", "Virus replication" ]
B
In Endocytosis the cell membrane fuses around the receptor. Example is cells take up cholesterol contained in low-density lipoprotein. (REF: GANONG&;S REVIEW OF MEDICAL PHYSIOLOGY)
sciq
sciq_01_04488
What energy is the energy of motion?
[ "kinetic", "thermal", "potential", "optimal" ]
A
Kinetic energy is the energy of motion. Any object that is moving possesses kinetic energy. Baseball involves a great deal of kinetic energy. The pitcher throws a ball, imparting kinetic energy to the ball. When the batter swings, the motion of swinging creates kinetic energy in the bat. The collision of the bat with t...
math_qa
mathqa_03_00514
every letter in the alphabet has a number value that is equal to its place in the alphabet . thus , the letter a has a value of 1 , the letter b has a value of 2 , the letter c has a value of 3 , etc . . . the number value of a word is obtained by adding up the value of the letters in the word and then multiplying that...
[ "72", "75", "78", "81" ]
C
"` ` dog ' ' = ( 4 + 15 + 7 ) * 3 = 78 . the answer is c ."
sciq
sciq_01_06046
What does the armor including spines in some species offer?
[ "nutrition", "energy", "protection from predators", "protection from cold" ]
C
sciq
sciq_01_03383
Who study volcanoes to be able to predict when a volcano will erupt?
[ "volcanologists", "virologists", "vocologists", "ornithologists" ]
A
Volcanic eruptions can be devastating, particularly to the people who live close to volcanoes. Volcanologists study volcanoes to be able to predict when a volcano will erupt. Many changes happen when a volcano is about to erupt.
ARC-Challenge
arc_04_03193
To determine the boiling point of a liquid, a student must use all of these tools except
[ "a stopwatch.", "a heat source.", "safety goggles.", "a thermometer." ]
A
null
openbookqa
obqa_02_00521
A breeze is blowing across a field, growing stronger and stronger. The breeze becomes a storm of wind, moving rocks and breaking trees. This wind is likely the cause of
[ "evenly heated spaces", "unevenly distributed heat", "heated earth spaces", "space heaters" ]
B
uneven heating causes convection
ARC-Easy
arc_04_01012
Which is true of scientific discoveries?
[ "All scientific discoveries are based solely on observation and never experimentation.", "Sometimes scientific discoveries are made by accident, like the discovery of penicillin.", "If a scientist cannot provide the exact time and place his or her discovery was made, it is dismissed.", "All scientific discove...
B
null
sciq
sciq_01_04145
What part of the continuous dermal tissue system covers stems?
[ "callus", "cuticle", "dermis", "epidermis" ]
D
sciq
sciq_01_10833
Green cyanobacteria on a lake produce food through what process?
[ "reverse transferase", "spermatogenesis", "photosynthesis", "glycolysis" ]
C
Green cyanobacteria on a lake make food by photosynthesis.