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sciq
sciq_01_09551
An electron is accelerated from rest through a potential difference of what?
[ "joules", "amperes", "watts", "volts" ]
D
An electron is accelerated from rest through a potential difference of volts. It then enters a region traveling perpendicular to a magnetic field of . Calculate the velocity of the electron.
sciq
sciq_01_09120
Restriction enzymes or restriction endonucleases are prokaryotic enzymes that recognize and cut what at specific sequences?
[ "dna", "bacteria", "mitochondria", "rna" ]
A
Restriction enzymes or restriction endonucleases are prokaryotic enzymes that recognize and cut DNA at specific sequences, called restriction sites. It is believed that they evolved as a defense mechanism against foreign DNA, such as viral DNA. Over 3,000 restriction enzymes have been identified. Some of the more commo...
medmcqa
medmcqa_05_01756
HbH is associated with:
[ "Deletion of 3 alpha genes", "Deletion of 4 alpha genes", "Deletion of 3 beta genes", "Deletion of 4 beta genes" ]
A
HbH Disease is associated with deletion of 3 out of 4 alpha globin genes. Ref: Robbins pathologic basis of disease 6th edn/page 619.
ARC-Challenge
arc_04_02404
The chemical symbol for niobium is Nb. Based on its symbol, what can be concluded about niobium?
[ "Niobium is a compound.", "Niobium is an element.", "Niobium is a metal.", "Niobium is a mixture." ]
B
null
math_qa
mathqa_03_00980
a certain car ' s price decreased by 2.5 % ( from the original price ) each year from 1996 to 2002 , during that time the owner of the car invested in a new carburetor and a new audio system for the car , which increased car ' s price by $ 1,000 . if the price of the car in 1996 was $ 22,000 , what is the car ' s price...
[ "$ 18,400", "$ 19,700", "$ 20,200", "$ 20,400" ]
B
"price in 96 = 22000 price decrease each year = 2.5 / 100 * 22000 = 550 price in 97 = 22000 - 550 price in 98 = 22000 - 2 * 550 price in 99 = 22000 - 3 * 550 price in 00 = 22000 - 4 * 550 price in 01 = 22000 - 5 * 550 price in 02 = 22000 - 6 * 550 = 18700 investment in the car = 1000 net price of the car in 02 = 18700 ...
math_qa
mathqa_03_01306
mr yadav spends 60 % of his monthly salary on consumable items and 50 % of the remaining on clothes and transport . he saves the remaining amount . if his savings at the end of the year were 24624 , how much amount per month would he have spent on clothes and transport ?
[ "4038", "8076", "2052", "4845.6" ]
C
"∵ amount , he have spent in 1 month on clothes transport = amount spent on saving per month ∵ amount , spent on clothes and transport = 24624 ⁄ 12 = 2052 answer c"
math_qa
mathqa_03_02608
20 % of major airline companies equip their planes with wireless internet access . 70 % of major airlines offer passengers free on - board snacks . what is the greatest possible percentage of major airline companies that offer both wireless internet and free on - board snacks ?
[ "20 %", "30 %", "40 %", "70 %" ]
A
to maximize the percentage of companies offering both , let ' s assume that all 20 % of companies which offer wireless internet also offer snacks . the answer is a .
sciq
sciq_01_05082
Noninfectious diseases can't be passed from one person to another. instead, these types of diseases are caused by factors such as environment, genetics and what?
[ "lifestyle", "age", "weight", "education" ]
A
Noninfectious diseases can't be passed from one person to another. Instead, these types of diseases are caused by factors such as the environment, genetics, and lifestyle. Examples of inherited noninfectious conditions include cystic fibrosis and Down syndrome. If you're born with these conditions, you must learn how t...
sciq
sciq_01_10737
What is the term for the use of two or more lewis structures to represent the covalent bonding in a molecule?
[ "frequency", "resonance", "harmony", "reaction" ]
B
Resonance is the use of two or more Lewis structures to represent the covalent bonding in a molecule. One of the valid structures is referred to as a resonance structure. It is now understood that the true structure of a molecule which displays resonance is that of an average or a hybrid of all the resonance structures...
math_qa
mathqa_03_03682
a salesman â € ™ s terms were changed from a flat commission of 5 % on all his sales to a fixed salary of rs . 1000 plus 2.5 % commission on all sales exceeding rs . 4,000 . if his remuneration as per new scheme was rs . 700 more than that by the previous schema , his sales were worth ?
[ "s . 8,000", "s . 9,000", "s . 20,000", "s . 10,000" ]
A
[ 1000 + ( x - 4000 ) * ( 2.5 / 100 ) ] - x * ( 5 / 100 ) = 700 x = 8000 answer a
math_qa
mathqa_03_03062
a frog can climb up a well at 3 ft per min but due to slipperiness of the well , frog slips down 2 ft before it starts climbing the next minute . if the depth of the well is 57 ft , how much time will the frog take to reach the top ?
[ "29", "27", "55", "17" ]
C
explanation : as per given , in 1 min , frog climbs up 3 ft and slips down by 2 ft . so the frog climbs only 1 ft in 1 min so after 54 mins , it would have climbed 54 ft . at the end of 55 mins it climbs up 3 ft to make it 57 ft and come out of the well . once it had reached the destination , it will not slip . so the ...
medmcqa
medmcqa_05_00316
Severe hyperkalemia is seen in combination with:
[ "Amiloride and Furosemide", "Lisinopril and furosemide", "Losartan and amiloride", "Propranolol and verapamil" ]
C
Ans. C. Losartan and amilorideACE inhibitors/ARBs result in hyperkalemia.Side effectsa. Hypotension may occur especially in patients who are hypovolemic as a result of diuretics, salt restriction, or gastrointestinal fluid loss.b. Hyperkalemia- mostly in patients with renal impairment, NSAIDs & K+ sparing diuretics.c. ...
sciq
sciq_01_06413
What organism are resistant to freezing and drying and also are metabolically inactive?
[ "trichina", "spirogyra", "zygosporangia", "giardia" ]
C
math_qa
mathqa_03_03708
jack and jill work at a hospital with 3 other workers . for an internal review , 2 of the 5 workers will be randomly chosen to be interviewed . what is the probability that jack and jill will both be chosen ?
[ "1 / 3", "1 / 10", "1 / 15", "3 / 8" ]
B
1 / 5 c 2 = 1 / 10 . answer : b .
medmcqa
medmcqa_05_01866
Xanthurenic acid, accumulation occurs due to pyridoxine deficiency, is a metabolite of which amino acid?
[ "Tyrosine", "Phenylalanine", "Tryptophan", "Alanine" ]
C
In the metabolism of Tryptophan, Kynurenine is an intermediate step.T his step is catalyzed by Kynureninase enzyme which is Vitamin B6 dependent. When there is Vitamin B6 deficiency this pathway is blocked. Hence accumulated Kynurenine is shunted to Xanthurenic acid.
openbookqa
obqa_02_03541
Organisms can be preserved in
[ "Sandstone", "Water pipes", "Cars.", "Trees" ]
A
organisms can be preserved in sedimentary rock
ARC-Easy
arc_04_00530
What is the primary function of skin cells?
[ "to deliver messages to the brain", "to generate movement of muscles", "to provide a physical barrier to the body", "to produce carbohydrates for energy" ]
C
null
sciq
sciq_01_08547
The properties of cyclic hydrocarbons are generally quite similar to those of the corresponding open-chain compounds. so cycloalkanes (with the exception of cyclopropane, which has a highly strained ring) act very much like noncyclic alkanes. cyclic structures containing five or six carbon atoms, such as cyclopentane a...
[ "stable", "large", "small", "reactive" ]
A
The properties of cyclic hydrocarbons are generally quite similar to those of the corresponding open-chain compounds. So cycloalkanes (with the exception of cyclopropane, which has a highly strained ring) act very much like noncyclic alkanes. Cyclic structures containing five or six carbon atoms, such as cyclopentane a...
medmcqa
medmcqa_05_02186
The contents of the paralingual space do NOT include the:
[ "Hypoglossal nerve", "Lingual aery", "Lingual nerve", "Submandibular gland" ]
B
The paralingual space is a space inside the floor of the mouth. It is bounded by the mylohyoid muscle, the lateral tongue, the hyoid bone, and the oral mucosa. The paralingual space contains the deep poion of the submandibular gland, the lingual nerve and submandibular ganglion, the sublingual gland and fold, and the h...
openbookqa
obqa_02_03268
When I hear news of a warm front I make sure to bring
[ "game boy", "clocks", "guns", "waterproof appendage covers" ]
D
a warm front causes cloudy and rainy weather
ARC-Easy
arc_04_00479
Which statement is a description of weather?
[ "Summers in Tucson are hot and dry.", "Winters in Flagstaff are cold and snowy.", "The temperature is 55° F in Winslow today.", "The Sun will set in Yuma today at 6:45 p.m." ]
C
null
math_qa
mathqa_03_00044
a shopkeeper buys two articles for rs . 1000 each and then sells them , making 50 % profit on the first article and 50 % loss on second article . find the net profit or loss percent ?
[ "500", "768", "276", "280" ]
A
"profit on first article = 50 % of 1000 = 500 . this is equal to the loss he makes on the second article . that , is he makes neither profit nor loss . answer : a"
sciq
sciq_01_09111
What is the term for a formula that shows the elements in a compound in their lowest whole-number ratio?
[ "intrinsic formula", "Dwarf Formula", "measured formula", "empirical formula" ]
D
An empirical formula is a formula that shows the elements in a compound in their lowest whole-number ratio. Glucose is an important simple sugar that cells use as their primary source of energy. Its molecular formula is C 6 H 12 O 6 . Since each of the subscripts is divisible by 6, the empirical formula for glucose is ...
sciq
sciq_01_11578
Nitrogen and sulfur oxides form what type of rain?
[ "heavy rain", "toxic rain", "acid rain", "common rain" ]
C
Both nitrogen and sulfur oxides are toxic to humans. These compounds can cause lung diseases or make them worse. Nitrogen and sulfur oxides form acid rain, which is described in the next concept.
sciq
sciq_01_10614
What property is associated with the number of reactant molecules involved in an elementary step?
[ "molecularity", "kilocalorie", "pollenation", "Molecules" ]
A
The number of reactant molecules in an elementary step is referred to as its molecularity. The vast majority of elementary steps are unimolecular or bimolecular.
openbookqa
obqa_02_01284
Hummingbirds gather nectar using their
[ "bills", "wings", "hands", "feet" ]
A
a skinny beak is used for obtaining food by a bird from small spaces
openbookqa
obqa_02_00976
Plant cells can't perform photosynthesis
[ "in a backyard", "in a desert", "in a closet", "in water" ]
C
plant cells can perform photosynthesis
ARC-Challenge
arc_04_02289
One similarity between a small, solid sample of aluminum and a large, liquid sample of aluminum is that both samples have
[ "a definite shape.", "a definite volume.", "the same number of atoms.", "the same amount of energy." ]
B
null
medmcqa
medmcqa_05_00953
Which of the following tumor is the most chemoresistant?
[ "Synol sarcoma", "Osteosarcoma", "Malignant fibrous histiocytoma", "Embryonal rhabdomyosarcoma" ]
C
Malignant fibrous histiocytomas are derived from fibroblast. The typical age at presentation is between 50 and 70 years. They present with pain, with or without a palpable mass. Radiographically, a mass is usually evident, with destruction of surrounding tissue and bone. Treatment is wide resection with a margin of >=4...
sciq
sciq_01_04971
What thin whip-like structures help prokaryotes move toward food or away from toxins?
[ "antennae", "sporangia", "cilia", "flagella" ]
D
Most prokaryotes have one or more long, thin "whips" called flagella (flagellum, plural) . You can see flagella in Figure below . Flagella help prokaryotes move toward food or away from toxins. Each flagellum spins around a fixed base. This causes the cell to roll and tumble.
sciq
sciq_01_08453
The ability of matter to burn is called?
[ "flammability", "solubility", "unpredictability", "eccentricity" ]
A
Flammability is the ability of matter to burn. Wood is flammable; iron is not. When wood burns, it changes to ashes, carbon dioxide, water vapor, and other gases. After burning, it is no longer wood.
medmcqa
medmcqa_05_00028
What is the new advance in cataract surgery?
[ "Femtosecond laser", "Neodymium Laser", "Nanosecond laser", "Picosecond Laser" ]
A
Ans. is 'a' i.e., Femtosecond laser * Femtosecond laser-assisted cataract surgery provides surgeons an exciting new option to potentially improve patient outcomes and safety.* In this surgery a femtosecond laser is used for various steps like lens fragmentation and capsulotomy.* Although the results have been good the ...
sciq
sciq_01_02598
How many bones does the mammalian middle ear have?
[ "two", "three", "four", "twelve" ]
B
The mammalian middle ear has three tiny bones that carry sound vibrations from the outer to inner ear. The bones give mammals exceptionally good hearing. In other vertebrates, the three bones are part of the jaw and not involved in hearing.
openbookqa
obqa_02_01478
An organism passes from the world and so it
[ "has croaked", "has money", "has health", "has flown" ]
A
if a living thing dies then that living thing is dead
math_qa
mathqa_03_02069
in a restaurant , the profit is 120 % of the cost . if the cost increases by 12 % but the selling price remains constant , approximately what percentage of the selling price is the profit ?
[ "30 %", "49 %", "90 %", "100 %" ]
B
"explanation : let c . p . = rs . 100 . then , profit = rs . 120 , s . p . = rs . 220 . new c . p . = 112 % of rs . 100 = rs . 112 new s . p . = rs . 220 . profit = rs . ( 220 - 112 ) = rs . 108 . required percentage = ( 108 / 220 * 100 ) % = 49 % appox answer : b"
sciq
sciq_01_01734
After dispersal of a seed, what next step may occur if environmental conditions are favorable?
[ "infection", "bloom", "germination", "degradation" ]
C
ARC-Challenge
arc_04_02546
How many chromosomes are in a human sperm cell?
[ "12", "23", "46", "58" ]
B
null
ARC-Easy
arc_04_00500
Water enters a plant cell through the
[ "cell wall.", "chloroplasts.", "mitochondria.", "nucleus." ]
A
null
sciq
sciq_01_07187
Where are feces formed?
[ "liver", "large intestine", "small intestine", "duodenum" ]
B
34.3 Digestive System Processes Digestion begins with ingestion, where the food is taken in the mouth. Digestion and absorption take place in a series of steps with special enzymes playing important roles in digesting carbohydrates, proteins, and lipids. Elimination describes removal of undigested food contents and was...
openbookqa
obqa_02_04487
If a weed is pulled then the weed is what?
[ "fruitful", "terminated", "functioning", "ugly" ]
B
if a weed is pulled then that weed is destroyed
openbookqa
obqa_02_03709
usually plants die or become dormant after the
[ "lowest solstice", "naptime", "a good book", "lunch" ]
A
usually plants die or become dormant during the winter
sciq
sciq_01_04118
Hydrogen sulfide is a noxious and toxic gas produced from decaying organic matter that contains what?
[ "methane", "helium", "tin", "sulfur" ]
D
Hydrogen sulfide is a noxious and toxic gas produced from decaying organic matter that contains sulfur. A lethal concentration in rats corresponds to an inhaled dose of 715 molecules per million molecules of air. How many molecules does this correspond to per mole of air? How many moles of hydrogen sulfide does this co...
math_qa
mathqa_03_02848
a certain shade of gray paint is obtained by mixing 3 parts of white paint with 5 parts of black paint . if 2 gallons of the mixture is needed and the individual colors can be purchased only in one gallon or half gallon cans , what is the least amount of paint , in gallons , that must be purchased in order to measure o...
[ "2", "2 1 / 2", "3", "3 1 / 2" ]
B
"ratio ; white : black : gray = 3 : 5 : ( 3 + 5 ) = 3 : 5 : 8 if 2 gallons of the mixture is needed < = = > need 2 gallons of gray paint . then , 3 : 5 : 8 = x : y : 2 3 / 8 = x / 2 ; x = 3 / 4 5 / 8 = y / 2 ; y = 5 / 4 you need 3 / 4 gallon of white . you have to buy 1 gallons . you need 5 / 4 gallons of black . you h...
math_qa
mathqa_03_04914
at joel ’ s bookstore , the current inventory is 40 % historical fiction . of the historical fiction books , 40 % are new releases , while 70 % of the other books are new releases . what fraction of all new releases are the historical fiction new releases ?
[ "4 / 25", "8 / 29", "2 / 5", "8 / 15" ]
B
"let there be 100 books in all historic fiction books = 40 % of total = 40 other books = 60 new historic fiction = 40 % of 40 = 16 other new books = 70 % of 60 = 42 total new books = 58 fraction = 16 / 58 = 8 / 29 ans : b"
openbookqa
obqa_02_01997
How many times does the Earth complete a revolution around the sun in a decade?
[ "twelve", "one", "ten", "two" ]
C
a complete revolution of the Earth around the sun takes one solar year
sciq
sciq_01_04364
How many fingers do apes have on each hand?
[ "six", "four", "seven", "five" ]
D
Humans and apes have five fingers they can use to grasp objects. Do you think these are analogous or homologous structures? Explain.
sciq
sciq_01_04122
The axon contains microtubules and neurofilaments that are bounded by a plasma membrane known as what?
[ "axolemma", "axolenon", "xerophyte", "exolemal" ]
A
View the University of Michigan WebScope at http://virtualslides. umich. edu/Histology/EMsmallCharts/ 3%20Image%20Scope%20finals/054%20-%20Peripheral%20nerve_001. svs/view. apml?listview=1& (http://openstaxcollege. org/l/nervefiber) to see an electron micrograph of a cross-section of a myelinated nerve fiber. The axon ...
sciq
sciq_01_04478
Birds are the most numerous type of what vertebrates?
[ "arachnipod", "amphipod", "ornithopod", "tetrapod" ]
D
Birds evolved from a reptile ancestor but they are very different from reptiles today. Birds are also the most numerous tetrapod vertebrates.
sciq
sciq_01_02122
What is it called when plants release water vapor through their leaves?
[ "evaporation", "photosynthesis", "eutrophication", "transpiration" ]
D
Transpiration is like evaporation because it changes liquid water to water vapor. In transpiration, plants release water vapor through their leaves ( Figure below ). This water vapor rises into the atmosphere.
sciq
sciq_01_06885
What is quantified by measuring the number of decay processes per unit time?
[ "microwave power", "radioactivity", "fossil age", "temperature" ]
B
Radioactivity is quantified by measuring the number of decay processes per unit time. For example, we can measure radioactivity in terms of counts per minute (cpm), where each "count" is a single decay process, such as the emission of an α-particle. A sample of one particular isotope may have an activity of 5,000 cpm, ...
sciq
sciq_01_00609
What is defined as the change of water from its liquid phase to its gaseous phase?
[ "evaporation", "condensation", "transpiration", "absorption" ]
A
ARC-Easy
arc_04_01080
By attaching to sharks, remora fish eat the scraps of food left behind when the sharks feed. If remoras were not able to attach to sharks, they would most likely
[ "attach to boats.", "not be able to survive.", "find another source of food.", "not need to eat anymore." ]
B
null
math_qa
mathqa_03_03593
when a train travels at a speed of 60 kmph , it reaches the destination on time . when the same train travels at a speed of 50 kmph , it reaches its destination 15 min late . what is the length of journey ?
[ "75 km", "50 km", "60 km", "85 km" ]
A
"let x be the time reached with the speed 60 km / h 50 km / h - - - - > x + 15 distance is equal so 60 ( km / h ) × xhr = 50 ( km / h ) × ( x + 15 ) hr so 60 x = 50 x + 750 so the would be in km and x = 75 so 75 km answer : a"
sciq
sciq_01_07462
A channel protein is an example of what type of protein?
[ "hemoglobin protein", "choice proteins", "transport proteins", "component proteins" ]
C
Facilitated diffusion is the diffusion of solutes through transport proteins in the plasma membrane. Channel proteins, gated channel proteins, and carrier proteins are three types of transport proteins that are involved in facilitated diffusion.
medmcqa
medmcqa_05_02663
Drug causing visual disturbance -
[ "Pyrazinamide", "Rifampin", "Ethambutol", "PAS" ]
C
Ans. is 'c' i.e., Ethambutol Adverse effect of Ethambutolo Ethambutol is relatively non toxic.o The main adverse effect of Ethambutol is retrobulbar optic neuritis (^unilateral or B/L/o This causes:-# Loss of visual activityRed-green colour blindness# Central scotomaPeripheral vision loss.o The changes reverse, if the ...
medmcqa
medmcqa_05_01674
Vaginal Ph in reproductive age group is?
[ "4-4.5", "7-Jun", "8-Jul", "3-Jan" ]
A
ANSWER: (A) 4 - 4.5REF: 12th edition of Novak s Gynecology p. 192, Jeffcoate 7ed p. 27The pH of the normal vagina is lower than 4.5, which is maintained by the production of lactic acid. Estrogen-stimulated vaginal epithelial cells are rich in glycogen. Vaginal epithelial cells break down glycogen to monosaccharides, w...
sciq
sciq_01_00073
The fossil record shows that this type of event is followed by the evolution of new species to fill the habitats where old species lived?
[ "mass extinction", "formation extinction", "minor extinction", "moderate extinction" ]
A
After each mass extinction, new species evolve to fill the habitats where old species lived. This is well documented in the fossil record.
ARC-Challenge
arc_04_02571
Approximately 59% of the Moon is visible from Earth because the Moon rotates and revolves in the same period. Which most likely causes this phenomenon?
[ "the gravitational pull of the Sun", "the gravitational pull of Earth", "the composition of the Moon", "the phases of the Moon" ]
B
null
openbookqa
obqa_02_03133
Which is likeliest to metamorphose?
[ "a live insect", "a human", "a plant", "a dead butterfly" ]
A
metamorphosis is a stage in the life cycle process of some animals
math_qa
mathqa_03_01257
a and b can do a piece of work in 18 days ; band c can do it in 24 days a and c can do it in 36 days . in how many days will a , band c finish it together ?
[ "15 days", "12 days", "8 days", "16 days" ]
D
sol . ( a + b ) ' s 1 day ' s work = ( 1 / 18 ) ( b + c ) ' s 1 day ' s work = ( 1 / 24 ) and ( a + c ) ' s 1 day ' s work = ( 1 / 36 ) adding , we get : 2 ( a + b + c ) ' s 1 day ' s work = ¬ ( 1 / 18 + 1 / 24 + 1 / 36 ) = 9 / 72 = 1 / 8 ( a + b + c ) ' s 1 day ' s work = 1 / 16 thus , a , band c together can finish t...
sciq
sciq_01_02206
Magnetite crystals of different ages and on different continents pointed to different spots. the simplest explanation is that the continents have done what?
[ "changed", "reacted", "moved", "evolved" ]
C
Magnetite crystals of different ages and on different continents pointed to different spots. The simplest explanation is that the continents have moved.
sciq
sciq_01_04647
What occurs when waves interact with other waves?
[ "interference", "resurgence", "vibration", "frequency" ]
A
Wave interference occurs when waves interact with other waves. Constructive interference increases wave amplitude. Destructive interference decreases wave amplitude.
medmcqa
medmcqa_05_02836
The given device is used for
[ "To monitor depth of anaesthesia", "To monitor adequacy of paralysis", "To monitor temperature", "To monitor expired carbon dioxide" ]
B
The device shown is a peripheral nerve stimulator, which delivers train of four stimulus to peripheral nerve (ulnar nerve) to assess adequacy of muscle relaxation.
medmcqa
medmcqa_05_01333
To prevent exercise induced bronchial asthma drug used is
[ "Sodium cromoglycate", "Ipratropium bromide", "Terbutaline", "Epinephrine" ]
A
Sodium cromoglycate (Mast cell stabilizing agent)Inhibit degranulation of mast cells, thereby preventing the release of the chemical mediators of anaphylaxis.Improves lung function, reduce symptoms, and lower airway activity in persons with asthma.Most effective in patients who have either seasonal disease or perennial...
sciq
sciq_01_09816
The epidermis is made of which closely packed cells?
[ "muscle cells", "cancer cells", "epithelial cells", "nerve cells" ]
C
Figure 5.2 Layers of Skin The skin is composed of two main layers: the epidermis, made of closely packed epithelial cells, and the dermis, made of dense, irregular connective tissue that houses blood vessels, hair follicles, sweat glands, and other structures. Beneath the dermis lies the hypodermis, which is composed m...
openbookqa
obqa_02_03074
What would happen if you swing at a golf ball and miss?
[ "pharmacy garbage", "dog hair", "loss of soil", "soil gain" ]
C
soil loss causes grooves in soil
sciq
sciq_01_07857
What do you call the gently sloped ocean floor nearest the edges of continents?
[ "continental stratosphere", "continental divide", "continental shelf", "continental solution" ]
C
The continental shelf is the ocean floor nearest the edges of continents. It has a a gentle slope. The water over the continental shelf is shallow.
math_qa
mathqa_03_04693
a computer factory produces 3024 computers per month at a constant rate , how many computers are built every 30 minutes assuming that there are 28 days in one month ?
[ "2.25 .", "3.125 .", "4.5 .", "5.225 ." ]
A
"number of hours in 28 days = 28 * 24 number of 30 mins in 28 days = 28 * 24 * 2 number of computers built every 30 mins = 3024 / ( 28 * 24 * 2 ) = 2.25 answer a"
sciq
sciq_01_06903
What has atoms with unstable nuclei?
[ "hydrocarbon", "radionuclide", "microwaves", "radioisotope" ]
D
A radioisotope has atoms with unstable nuclei. Unstable nuclei naturally decay, or break down. They lose energy and particles and become more stable. As nuclei decay, they gain or lose protons, so the atoms become different elements. This is illustrated in the Figure below . The original, unstable nucleus is called the...
sciq
sciq_01_01022
Increasing voltage with a higher-volt battery does what to the current?
[ "stops it", "blocks it", "decreases it", "increases it" ]
D
Ohm’s law may be easier to understand with an analogy. Current flowing through a wire is like water flowing through a hose. Increasing voltage with a higher-volt battery increases the current. This is like opening the tap wider so more water flows through the hose. Increasing resistance reduces the current. This is lik...
sciq
sciq_01_09675
Which type of isomers generally have lower boiling and melting points than straight-chain isomers?
[ "branched-looping isomers", "branched-chain isomers", "straight-chain isomers", "branched - solar isomers" ]
B
Because isomers are different compounds, they have different properties. Generally, branched-chain isomers have lower boiling and melting points than straight-chain isomers. For example, the boiling and melting points of iso -butane are -12 °C and -160 °C, respectively, compared with 0 °C and -138 °C for n -butane. The...
sciq
sciq_01_02448
What is the blastocyst called after implantation?
[ "trophoblast", "an produce", "an embryo", "an nucleus" ]
C
After implantation occurs, the blastocyst is called an embryo . The embryonic stage lasts through the eighth week following fertilization. During this time, the embryo grows in size and becomes more complex. It develops specialized cells and tissues and starts to form most organs. For an interactive animation of embryo...
medmcqa
medmcqa_05_00110
A Patient with history of shoness of breath has Decreased FEV1/FVC Ratio, Normal DLCO. A 200 ml increase in baseline FEVI is observed 15 minutes after administration of bronchodilators. The likely diagnosis is
[ "Asthma", "Chronic Bronchitis", "Emphysema", "Interstitial Lung Disease" ]
A
Ans. is 'a' i.e., Asthma
math_qa
mathqa_03_04604
find 96 × × 97
[ "91 / 198", "91 / 12", "91 / 13", "91 / 10" ]
B
"here both numbers are less than 100 . so they are deficient of - 4 and - 3 compared with 100 . so answer : b"
sciq
sciq_01_03970
Many species secrete a hard external skeleton of what?
[ "sodium bicarbonate", "calcium carbonate", "carbon dioxide", "hydrogen carbonate" ]
B
sciq
sciq_01_02369
What are the mineral deposits that fill in underground cracks called?
[ "motherlode", "cores", "currents", "veins" ]
D
Underground water can be heated by magma. The hot water moves through cracks below Earth’s surface. Hot water can hold more dissolved particles than cold water. The hot, salty solution has chemical reactions with the rocks around it. The water picks up more dissolved particles. As it flows through open spaces in rocks,...
sciq
sciq_01_03545
How many chromosomes are in each set?
[ "21", "22", "23", "13" ]
C
Human cells normally have two sets of chromosomes, one set inherited from each parent. There are 23 chromosomes in each set, for a total of 46 chromosomes per cell. Each chromosome in one set is matched by a chromosome of the same type in the other set, so there are actually 23 pairs of chromosomes per cell. Each pair ...
sciq
sciq_01_05648
What protects you from pathogens and keeps you healthy?
[ "immunity system", "immune system", "potent system", "health system" ]
B
Your immune system usually protects you from pathogens and keeps you well. However, like any other body system, the immune system itself can develop problems. Sometimes it responds to harmless foreign substances as though they were pathogens. Sometimes it attacks the body’s own cells. Certain diseases can also attack a...
sciq
sciq_01_10564
What do you call the lightless part of the ocean?
[ "Davy Jones' Locker", "photic zone", "aphotic zone", "photoreactive zone" ]
C
The small surface zone that has light is the photic zone. The entire rest of the ocean does not have light and is the aphotic zone.
sciq
sciq_01_09380
What is the series of changes in the life of an organism?
[ "life cycle", "circle of life", "insect metamorphosis", "evolution" ]
A
Organisms that have a diploid life cycle spend the majority of their lives as diploid adults. All diploid adults inherit half of their DNA from each parent. When they are ready to reproduce, diploid reproductive cells undergo meiosis and produce haploid gametes. These gametes then fuse through fertilization and produce...
sciq
sciq_01_01677
Which organelle is often compared to a post office, moving proteins and lipids to where they need to go?
[ "the cell wall", "the golgi apparatus", "the nucleus", "the cytoplasm" ]
B
The Golgi apparatus is a large organelle that sends proteins and lipids where they need to go. It’s like a post office. It receives molecules from the endoplasmic reticulum. It packages and labels the molecules. Then it sends them where they are needed. Some molecules are sent to different parts of the cell. Others are...
ARC-Easy
arc_04_00903
Which best describes a characteristic of the jet stream?
[ "It forms a boundary between a cold air mass and a warm air mass.", "It creates the high winds around the eye of a hurricane.", "It forces the hot air along the equator to rise to areas in North America.", "It causes high pressure air masses to rotate clockwise." ]
A
null
sciq
sciq_01_00377
What astronomical phenomenon, formed of split asteroids or planetary rocks, provides clues about our solar system?
[ "galaxies", "meteorites", "stars", "comets" ]
B
Meteorites provide clues about our solar system. Many were formed in the early solar system ( Figure below ). Some are from asteroids that have split apart. A few are rocks from nearby bodies like Mars. For this to happen, an asteroid smashed into Mars and sent up debris. A bit of the debris entered Earth’s atmosphere ...
sciq
sciq_01_08624
Nearly how many millions of people die yearly due to air pollution?
[ "two million", "five million", "fifty million", "eight million" ]
B
Almost 5 million people die each year because of air pollution. In fact, polluted air causes more deaths than traffic accidents. Air pollution harms the respiratory and circulatory systems. Both outdoor and indoor air can be polluted.
medmcqa
medmcqa_05_00167
Flask shaped ulcers seen in a dysentry patient is diagnostic of:
[ "Shigellosis", "Amoebiasis", "Giardiasis", "Typhoid" ]
B
Flask shaped ulcers seen in intestinal Amoebiasis. The most Diagnostic test of amoebiasis is ELISA.
sciq
sciq_01_04753
What is the average number of individuals per unit of area or volume called?
[ "population count", "crowdedness", "population structure", "population density" ]
D
Population size is the number of individuals in a population. Population density is the average number of individuals per unit of area or volume. The pattern of spacing of individuals in a population may be affected by characteristics of a species or its environment.
sciq
sciq_01_11008
When this forms underground, volcanoes rise?
[ "magma", "CO2", "pumice", "soil" ]
A
Volcanoes rise where magma forms underground. Volcanoes are found at convergent plate boundaries and at hotspots. Volcanic activity is found at divergent plate boundaries. The map in Figure below shows where volcanoes are located.
sciq
sciq_01_09176
What kind of behaviors are adaptive because they are flexible, capable of changing if the environment changes?
[ "learned behavior", "passed behavior", "studied behavior", "human" ]
A
Learned behaviors are adaptive because they are flexible. They can change if the environment changes.
sciq
sciq_01_05606
What is the main function of the cardiovascular system?
[ "respiration", "implanatation", "to transport", "digestion" ]
C
Many ecosystems have changed because of human actions. The human species is responsible for a range of environmental problems.
medmcqa
medmcqa_05_04081
UMN lesion is characterised by :
[ "Weakness & spasticity", "Fasciculations", "Rigidity", "Localised muscle atrophy" ]
A
Answer is A (Weakness and Spasticity): Spasticity is a characteristic of U.M.N. lesion. Fasciculations, hypotonia and muscle atrophy are features of LMN, not UMN palsy UMN LMN Power :Decreased 1. Power :Very much decreased Weakness; Q (Muscle groups or Limbs being affected & Weakness (severe) due to paralysis of indivi...
sciq
sciq_01_08406
What process creates sperm?
[ "altostratus", "spermatogensis", "hypothalamus", "genesis" ]
B
Sperm are produced in the testes in the process of spermatogenesis.
medmcqa
medmcqa_05_04684
Most common cause of postural hypotension is
[ "Progressive cerebellar degeneration", "Striatonigral degeneration", "Peripheral neuropathy", "Adrenal insufficiency" ]
C
(C) Peripheral neuropathy # Causes of postural syncope: In patients receiving antihypertensive or vasodilator drugs and those who are hypovolemic because of diuretics, excessive sweating, diarrhea, vomiting, hemorrhage, or adrenal insufficiency.
openbookqa
obqa_02_03370
Which are likely slightly larger in size than its liquid counterparts?
[ "solid steel", "solid wood", "solid glaciers", "solid mercury" ]
C
when water freezes , that water expands
medmcqa
medmcqa_05_00015
ECG feature of Hyperkalemia includes
[ "Prolonged PR", "Wide QRS complex", "Prominent U Wave", "Prolonged QT interval" ]
B
(B) Wide QRS complex # ECG is essential and may be instrumental in diagnosing HYPERKALEMIA in the appropriate clinical setting.> ECG changes have a sequential progression of effects, which roughly correlate with the potassium level. ECG findings may be observed as follows:> Early changes of hyperkalemia include peaked ...
sciq
sciq_01_10789
Human evolution shows that evolutionary changes typically occur at what pace?
[ "rapid", "slow", "sudden", "uneven" ]
B
Usually evolutionary changes occur at a very slow pace. Human evolution took millions of years. However, sometimes evolution can also happen quite quickly.
math_qa
mathqa_03_00224
two circular signs are to be painted . if the diameter of the larger sign is 7 times that of the smaller sign , how many times more paint is needed to paint the larger sign ? ( we can assume that a given amount of paint covers the same area on both signs . )
[ "7", "14", "42", "49" ]
D
let r be the radius of the smaller sign . then the diameter of the smaller sign is 2 r , the diameter of the larger sign is 14 r , and the radius of the larger sign is 7 r . the area a of the smaller sign is a = pir ^ 2 . the area of the larger sign is pi ( 7 r ) ^ 2 = 49 pir ^ 2 = 49 a . since the area is 49 times lar...
medmcqa
medmcqa_05_03657
The over-expression of a trinucleotide repeat causes
[ "Parkinson's disease", "Caisson's disease", "Addison's disease", "Huntington's disease" ]
D
(D) Huntington's disease > Trinucleotide repeat expansions cause a number of chronic neuro degenerative disease.> Most of them are late onset and cell deaths is prominent in all of them.> The mutations occurs in open reading frames of the gene involved, with the expansions being smaller than those found in the fragile ...
medmcqa
medmcqa_05_03465
Glutathione is maintained in reduced state by the help of ?
[ "HMP shunt", "Glycogenesis", "Uronic acid pathway", "Transamination" ]
A
Ans. is 'a' i.e., HMP shunt Oxidized glutathione is reduced by the help of NADPH, which is generated by NADPH.
math_qa
mathqa_03_01540
9 men went to a theater . 8 of them spent rs . 3 each over their tickets and the ninth spent rs . 2 more than the average expenditure of all the 9 . determine the total money spent by them ?
[ "29", "29.25", "31", "31.23" ]
B
average of 9 = x 9 x = 8 * 3 + x * 2 x = 3.25 total = 9 * 3.25 = 29.25 b
medmcqa
medmcqa_05_03510
what is the Most common cause of tarsal tunnel syndrome ?
[ "Osteoahritis", "Ankylosing spondylitis", "Psoriatic ahritis", "Rheumatoid ahritis" ]
D
Tarsal tunnel syndrome - the syndrome occurs due to compression of tibial nerve within the fibrous osseous tunnel under the flexor retinaculum of ankle joint .This is associated with pain & parasthesia in the sole of the foot often worse at night. ref : maheswari 9th ed