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openbookqa
obqa_02_01996
The lunar face appears to change 52 times
[ "a millennium", "a month", "a day", "annually" ]
D
a different moon phase occurs once per week
math_qa
mathqa_03_03756
what is the smallest positive integer x such that ( x + 1 ) ^ 2 is divisible by 28 , 98 , 242 , and 308 ?
[ "153", "308", "121", "96" ]
A
"28 = 2 * 2 * 7 98 = 2 * 7 * 7 242 = 2 * 11 * 11 308 = 2 * 2 * 7 * 11 so ( x + 1 ) ^ 2 = 2 * 2 * 7 * 7 * 11 * 11 , which means ( x + 1 ) = 2 * 7 * 11 = 154 , which means x = 153 , which is option a"
medmcqa
medmcqa_05_01191
Diuretic used in essential hypeension is -
[ "Hydrochlohiazide", "Amiloride", "Furosemide", "Acetazolamide" ]
A
Low dose thiazide diuretics may be used alone or in combination with other anti hypeensive agents . mechanism of action:they inhibit the Na/cl pump in distal convoluted tubule and increase sodium excretion. Drugs used are :Hydrochlohiazide,chlohalidone(long acting and more potent than hydrochlohiazide but potassium los...
sciq
sciq_01_09108
Ground tissue forms the interior of the stem. the large central vacuoles of ground tissue cells fill with water to support the plant. the cells may also store what?
[ "fuel", "energy", "food", "Water" ]
C
Ground tissue forms the interior of the stem. The large central vacuoles of ground tissue cells fill with water to support the plant. The cells may also store food.
sciq
sciq_01_08903
The solution with the higher solute concentration is called what?
[ "hypertonic", "acetic", "hypotonic", "unsaturated" ]
A
In comparing two solutions of unequal solute concentration, the solution with the higher solute concentration is hypertonic, and the solution with the lower concentration is hypotonic. Solutions of equal solute concentration are isotonic.
sciq
sciq_01_00621
The vector sum of all the torques acting on an object is called what?
[ "peak capacity", "net torque", "torque load", "homeostasis" ]
B
the net torque is the vector sum of all the torques acting on the object. When adding torques it is necessary to subtract CW from CCW torques.
math_qa
mathqa_03_00493
sides of a rectangular park are in the ratio 3 : 2 and its area is 3750 sq m , the cost of fencing it at 30 ps per meter is ?
[ "s . 122", "s . 105", "s . 125", "s . 120" ]
B
"3 x * 2 x = 3750 = > x = 25 2 ( 75 + 30 ) = 210 m 210 * 1 / 2 = rs . 105 answer : b"
medmcqa
medmcqa_05_01749
A child has a vocabulary of 4–6 words however the main mode of communication and social interaction continues to be non-verbal what is the most likely developmental age of the child –
[ "12 months", "15 months", "18 months", "24 months" ]
B
Vocabulary of 4-6 words in addition to jargon is achieved by 15 months of age. However <20% of speech is understood and hence main mode of communication continnues to be non-verbal.
sciq
sciq_01_02040
Which feature in maps allows users to make corrections between magnetic north and true north?
[ "scale", "double compass rose", "inset", "key" ]
B
Some maps have a double compass rose. This allows users to make the corrections between magnetic north and true north. An example is a nautical chart that boaters use to chart their positions at sea ( Figure below ).
openbookqa
obqa_02_02521
When an oak leaf falls to the ground, it is because of
[ "heavy poetry", "air mass interaction", "wishful thinking", "the moon's gravity" ]
B
pushing an object requires force
sciq
sciq_01_00159
What do you call the horizontal stems of a strawberry plant that run over the ground surface?
[ "root volunteers", "stolons", "climbing vines", "sprouts" ]
B
Strawberry plants have horizontal stems called stolons that run over the ground surface. If they take root, they form new plants.
medmcqa
medmcqa_05_04354
Chest compression to ventilation ratio in resuscitation of children with 2 rescuers is
[ "30:02:00", "3:01", "15:02", "30:02:00" ]
C
In CPR of children compression to ventilation ratio if single rescuer is 30:2 and if double rescuer is 15:2.
sciq
sciq_01_03246
Animals can transport what waste material in the circulatory system and store it safely at high concentrations?
[ "urea", "proteins", "phosphorus", "carbon" ]
A
ARC-Easy
arc_04_01298
When cold weather freezes water in the cracks of rocks, which would most likely happen?
[ "The rocks would become rounded.", "The rocks would be used for shelter.", "The rocks would be moved by the wind.", "The rocks would break into smaller pieces." ]
D
null
medmcqa
medmcqa_05_03703
An infection becomes apparent only after a ceain incubation period. Shoest incubation period is seen in:
[ "Hepatitis A", "Hepatitis B", "Rubella", "Influenza" ]
D
Incubation period is defined as the time interval between invasion by an infectious agent and appearance of the first sign or symptom of the disease in question. Incubation period of, Influenza - 18 to 72 hours Hepatitis A - 15 to 45 days (usually 25 to 30 days) Hepatitis B - 45 to 180 days Rubella (German Measles) - 2...
sciq
sciq_01_06572
Lymph capillaries collect fluid that leaks out of what?
[ "blood capillaries", "alveoli", "bladder", "lymph nodes" ]
A
Lymph capillaries collect fluid that leaks out from blood capillaries. The lymphatic vessels return the fluid to the cardiovascular system.
sciq
sciq_01_01336
What is required to break bonds in reactants?
[ "energy", "food", "protein", "gas" ]
A
Why is activation energy needed? A reaction won’t occur unless atoms or molecules of reactants come together. This happens only if the particles are moving, and movement takes energy. Often, reactants have to overcome forces that push them apart. This takes energy as well. Still more energy is needed to start breaking ...
medmcqa
medmcqa_05_04586
Oxytocin infusion should be discontinued if there are more than ----- contractions consistently every 15minutes
[ "3", "5", "7", "10" ]
C
In general, oxytocin should be discontinued if the number of contractions persistswith a frequency of more than five in a 10-minute period or more than seven in a15-minute period or with a persistent nonreassuring fetal hea rate pattern.When oxytocin is stopped, its concentration in plasma rapidly falls because of theh...
math_qa
mathqa_03_03150
kamal obtained 76 , 60 , 72 , 65 and 82 marks ( out of 100 ) in english , mathematics , physics , chemistry and biology . what are his average marks ?
[ "71", "69", "72", "75" ]
A
"sol . average = 76 + 60 + 72 + 65 + 82 / 5 ) = ( 355 / 5 ) = 71 . answer a"
ARC-Easy
arc_04_00857
Evidence suggests that there is a relationship between ancient dinosaurs and modern birds. Through time, each occurrence of a new trait most likely resulted from which of the following?
[ "mutation of genes", "hybridization of species", "extinction of populations", "alteration of the environment" ]
A
null
sciq
sciq_01_05925
At the bottom of lakes and ponds, bacteria in what zone break down dead organisms that sink there?
[ "aphotic zone", "photoreactive zone", "trophic", "photic" ]
A
Lakes and Ponds Lakes and ponds can range in area from a few square meters to thousands of square kilometers. Temperature is an important abiotic factor affecting living things found in lakes and ponds. In the summer, thermal stratification of lakes and ponds occurs when the upper layer of water is warmed by the sun an...
openbookqa
obqa_02_04454
Humans sometimes eat what?
[ "air", "kernels", "ocean water", "rocks" ]
B
humans sometimes eat seeds
openbookqa
obqa_02_00466
A heavier object
[ "requires less force to move", "requires minimal effort to move", "requires more muscle power to shift", "requires a light touch to move" ]
C
as the mass of an object increases , the force required to push that object will increase
sciq
sciq_01_05336
What structures sweep laterally, hugging the pelvic walls, then turn medially and pierce the bladder wall obliquely?
[ "fallopian tube", "ureters", "tubules", "catheters" ]
B
Ureters The kidneys and ureters are completely retroperitoneal, and the bladder has a peritoneal covering only over the dome. As urine is formed, it drains into the calyces of the kidney, which merge to form the funnel-shaped renal pelvis in the hilum of each kidney. The hilum narrows to become the ureter of each kidne...
openbookqa
obqa_02_02770
Big flowers have more nectar than small flowers do. Because of this, which flowers will get the most bees?
[ "space cadet", "smaller ones", "bigger ones", "dead ones" ]
C
as the size of a flower increases , the number of pollinators it will attract increases
sciq
sciq_01_03046
When a solute dissolves into a solvent what is that called?
[ "mixing", "viscosity", "enthalpy", "solubility" ]
C
Enthalpy changes also occur when a solute undergoes the physical process of dissolving into a solvent. Hot packs and cold packs (see Figure below ) use this property. Many hot packs use calcium chloride, which releases heat when it dissolves according to the equation below.
ARC-Easy
arc_04_02134
An example of a learned behavior is
[ "driving a car", "having blue eyes", "shivering in the cold", "breathing air" ]
A
null
medmcqa
medmcqa_05_02917
Exercise testing is absolutely contraindicated in which one of the following:
[ "One week following myocardial infarction", "Unstable angina", "Aoic stenosis", "Peripheral vascular disease" ]
C
Answer is C (Aoic stenosis) "Many of the traditional contraindications such as recent myocardial infarction or congestive hea failure are no longer considered if the patient is stable and ambulatory but Aoic Stenosis remains a contraindication" Contraindications to exercise stress testing: Acute myocardial infarction (...
sciq
sciq_01_05494
What planet is closest to our sun?
[ "Earth", "Pluto", "Venus", "mercury" ]
D
Mercury is very close to the Sun, so it can get very hot. Mercury also has virtually no atmosphere. As the planet rotates very slowly, the temperature varies tremendously. In direct sunlight, the surface can be as hot as 427°C (801°F). On the dark side, the surface can be as cold as –183°C (–297°F)! The coldest tempera...
sciq
sciq_01_00960
What kind of gland produces an oily substance that waterproofs the hair and skin?
[ "nail gland", "sebaceous gland", "secretion gland", "mucous gland" ]
B
oily substance produced in the dermis by a sebaceous gland that waterproofs the hair and skin.
sciq
sciq_01_01660
In heart muscle, what released by neurons activates a signal transduction pathway?
[ "dopamine", "glucose", "acetylcholine", "glutamate" ]
C
sciq
sciq_01_01490
What organs have tiny tubes leading to and from elastic air sacs that improve airflow and oxygen uptake?
[ "apendix", "liver", "lungs", "ovaries" ]
C
medmcqa
medmcqa_05_01559
An infant of 5 months presents with sudden dropping of head and flexion of arms. On examination, infant has hypopigmented macule on trunk. What is the drug of choice for this condition
[ "Vigabatrin", "Sodium Valproate", "Ethosuccimide", "ACTH" ]
A
Sudden dropping of head and flexion of arms ⇒ Salam spells It is seen in west syndrome. Hypopigmented macules on trunk ⇒ Tuberous sclerosis Drug of choice: a) West syndrome ⇒ ACTH b) West syndrome + Tuberous Sclerosis ⇒ Vigabatrin
sciq
sciq_01_00065
Which cycle tracks the flow of nitrogen through an ecosystem?
[ "nitrogen reaction", "water cycle", "life cycle", "nitrogen cycle" ]
D
Mariana Ruiz Villarreal (LadyofHats) for CK-12 Foundation. The nitrogen cycle tracks the flow of nitrogen through an ecosystem . CC BY-NC 3.0.
medmcqa
medmcqa_05_01777
Moro's reflex disappears by what age:
[ "2 weeks", "4 weeks", "3-6 months", "12-18 months" ]
C
Ans C. 3-6 monthsMoro reflex is best elicited by the sudden dropping of the baby's head in relation to the trunk; the response consists of opening of the hands and extension and abduction of the upper extremities followed by anterior flexion of upper extremities with an audible cry.
math_qa
mathqa_03_02313
the dimensions of a room are 25 feet * 15 feet * 12 feet . what is the cost of white washing the four walls of the room at rs . 5 per square feet if there is one door of dimensions 6 feet * 3 feet and three windows of dimensions 4 feet * 3 feet each ?
[ "2277", "2977", "2677", "4530" ]
D
"area of the four walls = 2 h ( l + b ) since there are doors and windows , area of the walls = 2 * 12 ( 15 + 25 ) - ( 6 * 3 ) - 3 ( 4 * 3 ) = 906 sq . ft . total cost = 906 * 5 = rs . 4530 answer : d"
sciq
sciq_01_07713
What are mid-wavelength electromagnetic waves commonly referred to as?
[ "light", "x-rays", "gamma rays", "electricity" ]
A
Mid-wavelength electromagnetic waves are commonly called light. This range of electromagnetic waves has shorter wavelengths and higher frequencies than radio waves, but not as short and high as X rays and gamma rays. Light includes visible light, infrared light, and ultraviolet light. If you look back at Figure above ,...
ARC-Challenge
arc_04_02882
Due to the increasing average temperature of the atmosphere, polar ice sheets melt at a greater rate than they form. Which of these will be an effect of the continued melting of polar ice?
[ "A major reservoir of fresh water will decrease.", "Plant life will increase due to higher sea levels.", "Water runoff will cause an increase in ocean salinity.", "Ocean temperature will decrease with the addition of cold water." ]
A
null
openbookqa
obqa_02_00702
Taking it out into the sun can
[ "drain the power from a solar calculator", "power down a solar calculator", "short circuit a solar calculator", "allow a solar calculator to come on" ]
D
if something is in the sunlight then that something will absorb solar energy
openbookqa
obqa_02_02526
A thing that now exists in fossilized form that can be put together to take a full shape is
[ "extinct theories", "ancient beings", "huge needles", "large beans" ]
B
An example of a fossil is the bones of an extinct animal
ARC-Challenge
arc_04_02295
A doorbell contains a simple electromagnet. Which change would most likely increase the strength of an electromagnet?
[ "longer wires", "fewer wire coils", "an aluminum core", "a larger power source" ]
D
null
openbookqa
obqa_02_03296
Eagles survive by dining on
[ "salmon", "bears", "humans", "moose" ]
A
eagles eat fish
medmcqa
medmcqa_05_04003
A 34-year-old male complains of hyperacusis (sensitivity to loud sounds). Injury to which of the following cranial nerves is responsible?
[ "Hypoglossal", "Facial", "Accessory", "Vagus" ]
B
The facial nerve innervates the stapedius muscle, which is responsible for limiting movement of the stapes, thereby reducing the intensity of the sound entering the inner ear. The hypoglossal nerve innervates tongue muscles; the accessory nerve supplies the trapezius and sternocleidomastoid muscles; the vagus does not ...
sciq
sciq_01_08969
What type of sedimentary rocks are made of minerals that precipitate from saline water?
[ "chemical sedimentary rocks", "sandstone", "shale", "limestone" ]
A
The main types of sedimentary rocks are clastic or chemical. Some sedimentary rocks are a third type, organic. Clastic sedimentary rocks are made of sediments. The sediments differ in size. Chemical sedimentary rocks are made of minerals that precipitate from saline water. Organic sedimentary rocks are made from the bo...
sciq
sciq_01_00340
What is the color of the powder of a mineral?
[ "organic", "gray", "streak", "blue" ]
C
Streak is the color of the powder of a mineral. To do a streak test, you scrape the mineral across an unglazed porcelain plate. The plate is harder than many minerals, causing the minerals to leave a streak of powder on the plate. The color of the streak often differs from the color of the larger mineral sample, as Fig...
sciq
sciq_01_07130
In a mammal the front part of the brain is called the what?
[ "cerebrum", "brain stem", "thallus", "cerebellum" ]
A
Of all vertebrates, mammals have the biggest and most complex brain for their body size (see Figure below ). The front part of the brain, called the cerebrum , is especially large in mammals. This part of the brain controls functions such as memory and learning.
openbookqa
obqa_02_01614
what determines the number of body parts and organism is born with?
[ "survival of fittest", "random chance", "the organisms creators", "natural predators" ]
C
the number of body parts of an organism is an inherited characteristic
medmcqa
medmcqa_05_04986
How will you decrease aminoglycoside toxicity?
[ "Total dose OD", "Total dose BD", "Low dose OD", "Low dose BD" ]
A
Ans. is 'a' i.e., High dose OD Authoities recommend giving a single total daily dose regime for aminoglycosides for patients with normal renal function. This is based on the following considerations: 1) Aminoglycosides exe concentration dependent bactericidal action and a long post antibiotic effect, therefore higher p...
sciq
sciq_01_02766
Cells like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes, but a eukaryotic cell is typically larger than a prokaryotic cell, has a true nucleus (meaning its dna is surrounded by a membrane), and has other membrane-bound organelles that allow for what?
[ "replicating of functions", "scrobipalpa of functions", "compartmentalization of functions", "misuse of functions" ]
C
4.3 Eukaryotic Cells Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes, but a eukaryotic cell is typically larger than a prokaryotic cell, has a true nucleus (meaning its DNA is surrounded by a membrane), and has other membrane-bound organelles that allow for compartmentalizatio...
openbookqa
obqa_02_00181
This type of energy resource often results in particulates that are very toxic to breathe:
[ "wood", "coal", "oil", "solar" ]
B
coal is used to produce electricity by burning in coal-fire power stations
medmcqa
medmcqa_05_03384
What is the mechanism of action of Fluconazole?
[ "Inhibits fungal mitosis", "Inhibits lanosterol 14 demethylase", "Inhibits squalene epoxidase", "Inhibit ß1,3 glucan synthase" ]
B
Ref. KDT. Page. 793 Fluconazole They inhibit the fungal cytochrome P450 enzyme ‘lanosterol 14-demethylase’ and thus impair ergosterol synthesis leading to a cascade of membrane abnormalities in the fungus. lower affinity for mammalian CYP450 enzymes and lesser propensity to inhibit mammalian sterol synthesis – causes ...
sciq
sciq_01_00292
What are the two distinct types of cells found in the animal kingdom?
[ "prokaryotes and eukaryotes", "bacteria and eukaryotes", "DNA and Eukaryotes", "chromosomes and eukaryotes" ]
A
math_qa
mathqa_03_00025
if the charge of staying in a student youth hostel $ 18.00 / day for the first week , and $ 14.00 / day for each additional week , how much does it cost to stay for 23 days ?
[ "$ 160", "$ 350", "$ 282", "$ 274" ]
B
"total number of days of stay = 23 charge of staying in first week = 18 * 7 = 126 $ charge of staying for additional days = ( 23 - 7 ) * 14 = 16 * 14 = 224 $ total charge = 126 + 224 = 350 $ answer b"
ARC-Easy
arc_04_01213
Which of these cell parts contain instructions for the passage of traits from one generation to the next?
[ "cell membrane", "Golgi apparatus", "chromosomes", "endoplasmic reticulum" ]
C
null
math_qa
mathqa_03_00503
if tim had lunch at $ 50.50 and he gave 15 % tip , how much did he spend ?
[ "$ 58", "$ 60.60", "$ 70.60", "$ 40.60" ]
A
"the tip is 20 % of what he paid for lunch . hence tip = 15 % of 50.50 = ( 15 / 100 ) * 50.50 = $ 7.575 total spent 50.50 + 7.575 = $ 58 correct answer a"
openbookqa
obqa_02_02418
Which would alter your position over time?
[ "running in place", "walking straight", "jumping up/down", "sleeping" ]
B
moving changes position
medmcqa
medmcqa_05_00374
Feature of exudates pleural effusion is
[ "Pleural fluid protein: Serum protein ratio> 0.5", "Pleural fluid protein: Serum protein ratio> 0.8", "Pleural fluid protein: Serum protein ratio<0.5", "Pleural fluid protein: Serum protein ratio> 1.0" ]
A
According to Light's criteria for distinguishing pleural transudate from exudate,exudate is likely if one or more of the following criteria are met-Pleural fluid protein:serum protein ratio>0.5;Pleural fluid LDH:serum LDH ratio>0.6;Pleural fluid LDH>2/3 rds of the upper limit of normal serum LDH. Reference:Davidson's m...
openbookqa
obqa_02_00814
Sandbars are a part of most seas because there are
[ "waves which adjust silt", "lots of stones in seas", "places where fish eat", "sand that needs to be piled" ]
A
a sandbar is formed by water moving sediment downstream
math_qa
mathqa_03_02968
when a number is divided by 13 , the remainder is 6 . when the same number is divided by 7 , then remainder is 1 . what is the number ?
[ "243", "253", "312", "432" ]
B
"explanation : take 243 243 ÷ 7 = 34 , remainder = 5 hence this is not the answer take 312 312 ÷ 7 = 44 , remainder = 4 hence this is not the answer take 253 253 ÷ 7 = 36 , remainder = 1 . 253 ÷ 13 = 19 , remainder = 6 this satisfies both the conditions given in the question . hence it is the answer . answer : b"
medmcqa
medmcqa_05_00597
Which of the following drug is a common and classical example producing reverse tolerance?
[ "LSD", "Cannabis", "Alcohol", "Nicotine" ]
C
Reverse tolerance is seen with alcohol. Reverse tolerance is also called sensitization or hypersensitization. It involves the exaggerated effect of taking in a small amount of substance, in genetically susceptible individuals.
openbookqa
obqa_02_00771
Summer is the season where
[ "solar flares are heating the earth", "the hemispheres are rotating", "a portion of the planet is in closer proximity to the sun", "the sun is flaring up more" ]
C
summer is when a hemisphere is tilted towards the sun
math_qa
mathqa_03_02641
how much greater is the combined area in square inches of the front and back of a rectangular sheet of paper measuring 11 inches by 19 inches than that of a rectangular sheet of paper measuring 9.5 inches by 11 inches ?
[ "50 %", "87 %", "100 %", "187 %" ]
C
"let ' s just look at the dimensions ( no calculation needed ) . with dimension 11 the same , the other dimension 19 is twice 9.5 then the area will be double which means 100 % greater . the answer is c ."
openbookqa
obqa_02_04614
Which of these industries is most likely to effect an ecosystem?
[ "food", "coal", "solar", "retail" ]
B
mining changes an ecosystem
sciq
sciq_01_10650
In which specific organs are hormonal cells located?
[ "lymph nodes", "spinal cord", "endocrine glands", "mammary glands" ]
C
Hormones Maintaining homeostasis within the body requires the coordination of many different systems and organs. One mechanism of communication between neighboring cells, and between cells and tissues in distant parts of the body, occurs through the release of chemicals called hormones. Hormones are released into body ...
sciq
sciq_01_10012
Also called lodestone, the mineral magnetite is the most powerful what?
[ "healing magnet", "synthetic magnet", "natural permanent magnet", "material on Earth" ]
C
Some materials are natural permanent magnets. The most magnetic material in nature is the mineral magnetite, also called lodestone (see Figure below ). The magnetic domains of magnetite naturally align with Earth’s axis. The picture on the left shows a chunk of magnetite attracting small bits of iron. The magnetite spo...
medmcqa
medmcqa_05_00309
According to WHO leprosy is a public health problem if prevalence is more than
[ "0.10%", "0.01%", "0.50%", "1%" ]
B
At the end 2000, leprosy was a public health problem in 10 countries (prevalence rate > 1/10,000), mainly in Africa, Asia and Latin America. Thus to call it a public health problem prevalence per 10,000 should be more than 1 and per 100 should be > 0.01.
openbookqa
obqa_02_00986
Mammals are one of a few animals that's core temp
[ "fluctuates", "stays the same", "drops suddenly", "heats up" ]
B
a mammal is warm-blooded
ARC-Easy
arc_04_01563
A hurricane is a heat engine which converts one kind of energy into another. Hurricanes convert most of the heat energy into
[ "chemical energy.", "electrical energy.", "mechanical energy.", "potential energy." ]
C
null
sciq
sciq_01_02464
What are used as model organisms in molecular biology and genetics?
[ "electromagnetic slime molds", "convergent slime molds", "cellular slime molds", "weather slime molds" ]
C
Cellular slime molds are used as model organisms in molecular biology and genetics. They may be the key to how multicellular organisms evolved. Can you explain why?.
sciq
sciq_01_00172
What term is used to describe when a liquid is the temperature at which its equilibrium vapor pressure is equal to the pressure exerted on the liquid by its gaseous surroundings?
[ "burning point", "freezing point", "boiling point", "evaporating point" ]
C
Boiling Points When the vapor pressure increases enough to equal the external atmospheric pressure, the liquid reaches its boiling point. The boiling point of a liquid is the temperature at which its equilibrium vapor pressure is equal to the pressure exerted on the liquid by its gaseous surroundings. For liquids in op...
medmcqa
medmcqa_05_03311
Streptococcal glomerulonephritis is best diagnosed by:
[ "ASO titre", "Anti DNAse", "Hyaluronidase", "Culture" ]
B
In streptococcal glomerulonephritis, ASO titre is often low. So, retrospective diagnosis is made by anti DNAase and antihyaluronidase.
medmcqa
medmcqa_05_03928
Which is an effect of fillers in composite is:
[ "Increased thermal expansion.", "Decreased thermal expansion.", "Increased thermal contaction.", "Increased polymerization shrinkage." ]
B
Fillers in composite Generally between 30% to 70% by volume or 50% to 85% by weight of a composite Benefits of Fillers Reinforcement- compressive strength, tensile strength, modulus of elasticity (i.e., stiffness or rigidity), and toughness Reduction of polymerization shrinkage/contraction Reduction in thermal expansi...
openbookqa
obqa_02_04515
Which likely has a negative impact?
[ "water on the glaicial environment", "life on the glaicial environment", "cold on the glaicial environment", "heat on the glaicial environment" ]
D
glaciers melting has a negative impact on the glaicial environment
sciq
sciq_01_04271
Mutations which benefit the organism in which they occur are known as?
[ "extraordinary mutations", "beneficial mutations", "helpful mutations", "healthy mutations" ]
B
Some mutations have a positive effect on the organism in which they occur. They are called beneficial mutations . They lead to new versions of proteins that help organisms adapt to changes in their environment. Beneficial mutations are essential for evolution to occur. They increase an organism’s changes of surviving o...
medmcqa
medmcqa_05_02065
A 17-year-old boy was stabbed during a gang fight, resulting in the transection of the obturator nerve. Which of the following muscles is completely paralyzed?
[ "Pectineus", "Adductor magnus", "Adductor longus", "Biceps femoris" ]
C
The adductor longus is innervated by only the obturator nerve. Thus, injury here could completely paralyze the adductor longus. The pectineus is innervated by both the obturator and femoral nerves. The adductor magnus is innervated by both the obturator nerve and tibial pa of the sciatic nerve. The biceps femoris is in...
sciq
sciq_01_05096
What is evolution that occurs over a long period of time called?
[ "macroevolution", "spontaneous mutation", "introgression", "catabolism" ]
A
Evolution that occurs over a long period of time is called macroevolution . It might take place over millions of years. This scale of evolution occurs above the level of the species. Fossils provide evidence for evolution at this scale. The evolution of the horse family, shown in Figure below , is an example of macroev...
ARC-Easy
arc_04_01386
An element with which property would be best to use in electrical wiring?
[ "insulator", "conductor", "malleable", "porous" ]
B
null
openbookqa
obqa_02_04001
amphibians hatch from
[ "trees", "rocks", "the sky", "calcium life pods" ]
D
amphibians hatch from eggs
sciq
sciq_01_10813
Which organ breaks down amino acids and toxins that are in the blood?
[ "skin", "kidney", "small intestine", "liver" ]
D
The liver breaks down excess amino acids and toxins in the blood.
sciq
sciq_01_10219
What electrical force is responsible for fission?
[ "velocity", "repulsion", "friction", "momentum" ]
B
The strong force predominates and can cause nuclei of complex atoms with many protons to be stable. The electric force of repulsion is responsible for fission, the breaking apart of nuclei, and therefore also for atom bombs and nuclear power. A form of fission where a helium nucleus is a product, is called alpha radiat...
medmcqa
medmcqa_05_02373
"Wandering acetabulam" is seen in
[ "Pyogenic arthritis", "CHD", "TB arthritis", "Syphilitic arthritis" ]
C
Ans. c (TB arthritis). (Ref. Maheshwari, Orthopaedics, 2nd/pg. l80)# Wandering acetabulum is seen in TB arthritis of hip joint.WANDERING ACETABUL AM# After spine the hip is affected most commonly in TB. (MH 2009)# Usually it occurs in children & adolescent, but patients at any age can be affected.# Multiple cavitations...
math_qa
mathqa_03_02437
what is the 8 th digit to the right of the decimal point in the decimal equivalent of 73 / 11 ?
[ "1", "3", "4", "5" ]
B
"73 / 11 = 6.6363 . . . . 63 is non - terminating repeating decimal . the 8 th digit to the right of decimal point will be 3 . answer b"
math_qa
mathqa_03_03505
how many positive integers less than 100 are neither multiples of 4 or 5 .
[ "a", "b", "c", "d" ]
B
"to answer this q we require to know 1 ) multiples of 4 till 100 = 100 / 4 = 25 2 ) multiples of 5 till 100 = 100 / 5 = 20 add the two 25 + 20 = 45 ; subtract common terms that are multiple of both 4 and 5 . . lcm of 4 and 5 = 20 multiples of 20 till 100 = 100 / 20 = 5 = so total multiples of 4 and 5 = 45 - 5 = 40 ans ...
sciq
sciq_01_00226
What is the method of setting or correcting a measuring device by matching it to known measurement standards called?
[ "calibration", "parallax", "distortion", "precision" ]
A
When using measuring devices, we often use a technique called calibration to increase the accuracy of our measurements. Calibration is a method of setting or correcting a measuring device by matching it to known measurement standards. To better understand calibration, we will look at the example of calibrating a thermo...
sciq
sciq_01_03660
What measure is resorted to by people who wish to screen out genetic abnormalities in the fetus?
[ "contraceptive use", "stem cell therapy", "in vitro fertilization", "prenatal testing" ]
D
A genetic disorder that is caused by a mutation can be inherited. Therefore, people with a genetic disorder in their family may be concerned about having children with the disorder. Professionals known as genetic counselors can help them understand the risks of their children being affected. If they decide to have chil...
medmcqa
medmcqa_05_00440
In thyroid gland, iodine is transpoed into the lumen of the follicles by
[ "Endocytosis", "Pendrin protein", "Antipo", "Primary active transpo" ]
B
Pendrin protein is a chloride-iodide transpoer protein encoded by the gene responsible for Pendred syndrome, impoant in function of thyroid gland, kidney, and inner ear.Endocytosis is defined as the uptake by a cell of material from the environment by invagination of the plasma membrane; it includes both phagocytosis a...
sciq
sciq_01_05239
What are two ways cnidarians are able to reproduce?
[ "internally and externally", "spawning and sexual", "mitosis and meiosis", "asexually and sexually" ]
D
General Cnidarian Life Cycle. Cnidarians may reproduce both asexually and sexually.
math_qa
mathqa_03_03581
20 machines can do a work in 5 days . how many machines are needed to complete the work in 10 days ?
[ "10", "15", "8", "12" ]
A
"required number of machines = 20 * 5 / 10 = 10 answer is a"
openbookqa
obqa_02_02487
What will air usually do when heated up beyond a certain point?
[ "it will fall", "it will remain", "it will ascend", "it will die" ]
C
if gas is heated then that gas will rise
sciq
sciq_01_08890
What is another term for movable joints?
[ "synovial", "sesamoidal", "interstitial", "fibrous" ]
A
Movable joints are also known as synovial joints . This is because the space between the bones is filled with a thick fluid, called synovial fluid , that cushions the joint (see Figure below ).
math_qa
mathqa_03_02158
x and y start a business with rs . 2000 and rs . 12000 respectively . hoe should they share their profits at the end of one year ?
[ "1 : 6", "6 : 1", "1 : 5", "5 : 1" ]
A
"they should share the profits in the ratio of their investments . the ratio of the investments made by x and y = 2000 : 12000 = > 1 : 6 . answer : a"
sciq
sciq_01_03376
Which temperatures cause particles of reactants to have more energy?
[ "lower", "reducing", "non-existant", "higher" ]
D
When the temperature of reactants is higher, the rate of the reaction is faster. At higher temperatures, particles of reactants have more energy, so they move faster. They are more likely to bump into one another and to collide with greater force. For example, when you fry an egg, turning up the heat causes the egg to ...
openbookqa
obqa_02_03630
Someone stops living when
[ "They cut their hair", "They stick their head in a trash can", "They are without air", "They eat disgusting food" ]
C
if a living thing dies then that living thing is dead
medmcqa
medmcqa_05_03672
Which among the following are the essential amino acids?
[ "Phenylalanine, Tryptophan, Lysine", "Phenylalanine, Arginine, Methionine", "Phenylalanine, Valine, Glycine", "Histidine, Glutamine, Valine" ]
A
Amino acids are the basic building blocks of proteins. Twenty amino acids make up proteins in living organisms; several hundred more amino acids perform specialized functions in human and non-human biology. Amino acids are often described as Essential (must be obtained directly from food) Non-essential (the human body ...
sciq
sciq_01_01717
What do you call an animal in which the embryo, often termed a joey, is born immature and must complete its development outside the mother's body?
[ "eukaryotic", "monotreme", "placental mammal", "marsupial" ]
D
All other mammals give birth to live young and belong to one of two different categories, the marsupials and the placental mammals. A marsupial is an animal in which the embryo, which is often called a joey, is born at an immature stage. Development must be completed outside the mother's body. Most female marsupials ha...
ARC-Challenge
arc_04_02581
Which simple machine increases the distance over which a load travels and reduces the needed force?
[ "wheel and axle", "wedge", "pulley", "inclined plane" ]
D
null
openbookqa
obqa_02_00737
I can use a Punnett Square to determine if
[ "I'll be able to walk on walls", "If I will be invisible", "I'll be able to have superpowers", "I'll be able to twist my tongue" ]
D
a Punnett square is used to identify the percent chance of a trait being passed down from a parent to its offspring
sciq
sciq_01_03840
What type of behavior occurs naturally in all animals of a given species?
[ "reflex", "learned", "innate", "observational" ]
C
An innate behavior is any behavior that occurs naturally in all animals of a given species. An innate behavior is also called an instinct . The first time an animal performs an innate behavior, the animal does it well. The animal does not have to practice the behavior in order to get it right or become better at it. In...
sciq
sciq_01_07088
When the pressure waves from the scala move the basilar membrane, the tectorial membrane slides across the what?
[ "cytoplasm", "stereocilia", "dendrites", "keratin" ]
B
The organs of Corti contain hair cells, which are named for the hair-like stereocilia extending from the cell’s apical surfaces (Figure 14.8). The stereocilia are an array of microvilli-like structures arranged from tallest to shortest. Protein fibers tether adjacent hairs together within each array, such that the arra...
medmcqa
medmcqa_05_00430
A 41-year-old woman with glaucoma is treated with acetazolamide. Several weeks later the woman has an aerial pH of 7.34, an aerial PCO2 of 29mmHg, and a plasma HCO3- of 15 mEq/L. Which of the following abnormalities has this women most likely developed?
[ "Metabolic acidosis", "Metabolic alkalosis", "Mixed acidosis", "Mixed alkalosis" ]
A
The laboratory results indicate that the aerial pH, aerial PCO2, and plasma HCO3- concentrations are all low. These changes clearly demonstrate metabolic acidosis, which occurs commonly when a carbonic anhydrase inhibitor is administered. The carbonic anhydrase enzyme attached to the brush border of the tubular epithel...