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math_qa
mathqa_03_03156
an amount of money is to be divided between p , q and r in the ratio of 3 : 7 : 12 . if the difference between the shares of p and q is rs . 2400 , what will be the difference between q and r ' s share ?
[ "1266", "3000", "2866", "2999" ]
B
"4 - - - 2000 5 - - - ? = > 3000 answer : b :"
openbookqa
obqa_02_03870
Some animals change their appearance completely during a stage of the life cycle known as
[ "metamorphosing", "metal", "Seven", "drawing" ]
A
metamorphosis is a stage in the life cycle process of some animals
sciq
sciq_01_11388
What is the first stage of cellular respiration called?
[ "photosynthesis", "appetite", "reproduction", "glycolysis" ]
D
When was the last time you enjoyed yogurt on your breakfast cereal, or had a tetanus shot? These experiences may appear unconnected, but both relate to bacteria which do not use oxygen to make ATP. In fact, tetanus bacteria cannot survive if oxygen is present. However, Lactobacillus acidophilus (bacteria which make yog...
ARC-Challenge
arc_04_03011
The classification of some organisms has changed. Which new process is used to reclassify organisms?
[ "Organisms are now given Latin-based scientific names.", "Structures are now examined at the molecular level.", "Organisms are now divided into three kingdoms.", "Structures are now used to classify organisms." ]
B
null
sciq
sciq_01_03761
What do you call a simple machine consisting of a sloping surface that connects lower and higher elevations?
[ "inclined plane", "jack", "wedge", "lever" ]
A
An inclined plane is a simple machine consisting of a sloping surface that connects lower and higher elevations. The ideal mechanical advantage of an inclined plane is always greater than 1.
ARC-Easy
arc_04_01758
When large areas of the rainforests are cleared and burned, climate can be affected. Which best explains how rainforest destruction can contribute to the greenhouse effect?
[ "by threatening native plants and animals", "by increasing the rate of soil erosion", "by increasing the water levels in oceans", "by releasing carbon into the atmosphere" ]
D
null
sciq
sciq_01_07673
What do young female meerkats act as in colonies?
[ "midwives", "predators", "babysitters", "defenders" ]
C
Besides social insects, animals in many other species also cooperate. For example, in meerkat colonies, young female meerkats act as babysitters. They take care of the baby meerkats while their parents are out looking for food.
math_qa
mathqa_03_00835
in a certain game , a large bag is filled with blue , green , purple and red chips worth 1 , 5 , x and 11 points each , respectively . the purple chips are worth more than the green chips , but less than the red chips . a certain number of chips are then selected from the bag . if the product of the point values of the...
[ "1", "2", "3", "4" ]
C
"28160 = 1 * 5 * 8 ^ 3 * 11 the factors of 8 must come from the purple point value , so there are 3 purple chips . the answer is c ."
ARC-Easy
arc_04_00690
In May 2007, wildfires burned more than 350 square miles of habitat in Florida and Georgia. Intense fires like this one can temporarily remove nitrogen, phosphorus, and potassium in area soil. What most likely happens in the burned areas until organic decay replenishes the lost nutrients?
[ "Consumers take on the ecological role of producers.", "Only secondary consumers obtain the resources they need.", "The carrying capacity of the soil for plant growth is reduced.", "The remaining organisms in the area become more territorial." ]
C
null
medmcqa
medmcqa_05_02495
Non invasive method for locating an expelled Cu-T: March 2013
[ "Hysteroscopy", "Laparoscopy", "USG", "Laparotomy" ]
C
Ans. C i.e. USG
sciq
sciq_01_00171
What makes and stores pigments that give petals and fruit their orange and yellow colors?
[ "chromoplasts", "sporozoans", "pores", "protozoa" ]
A
Chromoplasts make and store pigments that give petals and fruit their orange and yellow colors.
medmcqa
medmcqa_05_01782
Aflatoxins are produced by
[ "Aspergillus flavus", "Aspergillus niger", "Aspergillus fumigatus", "Candida" ]
A
The best-known mycotoxin is aflatoxin produced by Aspergillus flavus. It is present in ground nuts, corns and peas. It can cause hepatoma in animals. Ref: Textbook of Microbiology, Ananthanarayan and Paniker; 9th edition
medmcqa
medmcqa_05_01071
The given karyotype is seen in which of the following syndrome?
[ "Angelman syndrome", "Fragile x syndrome", "Turner syndrome", "Cri du chat syndrome" ]
D
Cri du chat syndrome is caused by a deletion of the end of the sho (p) arm of chromosome 5. (5P- syndrome)Symptoms include characteristic cat-like cry of affected children, epicanthus, severe intellectual disability, low set ears.
sciq
sciq_01_05993
What do you need to do to water to make it steam?
[ "heat it", "freeze it", "stir it", "cool it" ]
A
Energy in a body of water can be gained or lost depending on conditions. When water is heated above a certain temperature steam is generated. The increase in heat energy creates a higher level of disorder in the water molecules as they boil off and leave the liquid.
ARC-Easy
arc_04_00971
Which organ directly works to protect the human body from disease?
[ "heart", "kidney", "pancreas", "skin" ]
D
null
sciq
sciq_01_03941
What type of charge do electrons have?
[ "negative", "bipolar", "positive", "neutral" ]
A
Electrons have negative charge and protons have positive charge. The magnitude of the charge is the same for both, .
sciq
sciq_01_08440
What is the main component of milk?
[ "proteins", "water", "lactose", "fat" ]
B
A: Homogenized milk is a colloid. The particles in the milk are large enough to see—that’s why milk is white instead of clear like water, which is the main component of milk. However, the particles are not large enough to settle out of the mixture.
sciq
sciq_01_05783
Particulates cause lung diseases. they can also increase the risk of heart disease and the number of what?
[ "asthma attacks", "shortness of breath", "coughing", "cancer" ]
A
Particulates cause lung diseases. They can also increase the risk of heart disease and the number of asthma attacks. Particulates block sunlight from reaching Earth’s surface. This means there is less energy for photosynthesis. Less photosynthesis means that plants and phytoplankton produce less food. This affects whol...
math_qa
mathqa_03_04332
in a can , there is a mixture of milk and water in the ratio 4 : 3 . if the can is filled with an additional 8 liters of milk , the can would be full and the ratio of milk and water would become 2 : 1 . find the capacity of the can ?
[ "40", "36", "32", "28" ]
B
"let c be the capacity of the can . ( 4 / 7 ) * ( c - 8 ) + 8 = ( 2 / 3 ) * c 12 c - 96 + 168 = 14 c 2 c = 72 c = 36 the answer is b ."
openbookqa
obqa_02_00818
A herd of wild horses has been decreasing in size rapidly. Which of these might be the cause?
[ "There has been a lot of rain", "The month of July has arrived", "Predators have moved out of the area", "All of the vegetation has been dying" ]
D
the ability to find resources has a positive impact on an organism 's survival
math_qa
mathqa_03_04361
find 40 % of 440
[ "96", "94", "86", "176" ]
D
"we know that r % of m is equal to r / 100 × m . so , we have 40 % of 440 40 / 100 × 440 = 176 answer : d"
math_qa
mathqa_03_00384
today joelle opened an interest - bearing savings account and deposited $ 6000 . if the annual interest rate is 5 percent compounded interest , and she neither deposits nor withdraws money for exactly 2 years , how much money will she have in the account ?
[ "$ 6715", "$ 5615", "$ 6415", "$ 6615" ]
D
interest for 1 st year = 6000 * 5 / 100 = 300 interest for 2 nd year = 6300 * 5 / 100 = 315 total = 6000 + 300 + 315 = 6615 answer : d
medmcqa
medmcqa_05_00809
Sarita, a 30 year old woman develops a deep vein thrombosis in her left calf on fourth post operative day following cesarean section done for fetal distress. The patient is started on heparin and is scheduled to begin a 6 weeks course of warfarin therapy.The patient is a devoted mother who wants to breast feed her baby...
[ "Patient may continue breast feeding at her own risk.", "Patient should breast feed her baby only if her INR is at <2.5", "Patient can breast feed her baby after 6 weeks course of warfarin is over", "Warfarin is not a contraindication for lactation." ]
D
Remember: Warfarin is contraindicated in the first trimester of pregnancy as it can lead to contradi syndrome comprising of microcephaly, optic atrophy, nasal hypolplasia and chondrodysplasia punctate.It can also lead to IUGR, abortions and IUD. But warfarin is absolutely safe during lactation as an extremely minute q...
math_qa
mathqa_03_01511
from an island , it is possible to reach the mainland by either ferry p or ferry q . ferry p travels for 2 hours at 8 kilometers per hour , while ferry q takes a route that is three times longer . if ferry p is slower than ferry q by 4 kilometers per hour , how many hours longer is the journey of ferry q compared with ...
[ "1", "2", "3", "4" ]
B
the distance traveled by ferry p is 16 km . then the distance traveled by ferry q is 48 km . ferry q travels at a speed of 12 kph . the time of the journey for ferry q is 48 / 12 = 4 hours , which is 2 hours more than ferry p . the answer is b .
openbookqa
obqa_02_01906
An example of biofuel could be
[ "metal", "the sun", "leaves", "the wind" ]
C
biofuel is used to produce electricity by burning
sciq
sciq_01_03082
What passes through the prostate gland immediately inferior to the bladder before passing below the pubic symphysis?
[ "cerebellum", "vagina", "rectum", "urethra" ]
D
Male Urethra The male urethra passes through the prostate gland immediately inferior to the bladder before passing below the pubic symphysis (see Figure 25.3b). The length of the male urethra varies between men but averages 20 cm in length. It is divided into four regions: the preprostatic urethra, the prostatic urethr...
math_qa
mathqa_03_03192
find the value of a / b + b / a , if a and b are the roots of the quadratic equation x 2 + 4 x + 2 = 0 ?
[ "8", "10", "2", "16" ]
C
"a / b + b / a = ( a 2 + b 2 ) / ab = ( a 2 + b 2 + a + b ) / ab = [ ( a + b ) 2 - 2 ab ] / ab a + b = - 4 / 1 = - 4 ab = 2 / 1 = 2 hence a / b + b / a = [ ( - 4 ) 2 - 2 ( 2 ) ] / 2 = 4 / 2 = 2 . c )"
sciq
sciq_01_11047
The best method for preparing pure phosphorous acid is by hydrolyzing what?
[ "phosphorus trichloride", "dioxide trichloride", "dioxide phosphat", "carbon trichloride" ]
A
Dilution of the products with water, followed by filtration to remove calcium sulfate, gives a dilute acid solution contaminated with calcium dihydrogen phosphate, Ca(H2PO4)2, and other compounds associated with calcium phosphate rock. It is possible to prepare pure orthophosphoric acid by dissolving P4O10 in water. Th...
sciq
sciq_01_01174
What are the three classifications of elements?
[ "metals, non-metals and alkaloids", "metals, metaloids, and alkaloids", "alkaloids, metaloids, and non-metals", "metals, non-metals and metaloids" ]
D
The majority of known elements are classified as metals. Metals are elements that are lustrous, or shiny. They are also good conductors of electricity and heat. Examples of metals include iron, gold, and copper. Fewer than 20 elements are classified as nonmetals. Nonmetals lack the properties of metals. Examples of non...
sciq
sciq_01_03716
In a smoke detector, a battery in the electric circuit creates what between the metal plates?
[ "voltage", "cooling", "magnetism", "hydrogen" ]
A
Most of us have at least one device in our homes that guards our safety and, at the same time, depends on radioactivity to operate properly. This device is a smoke detector. A typical smoke detector contains an electric circuit that includes two metal plates about 1 cm apart. A battery in the circuit creates a voltage ...
openbookqa
obqa_02_03282
What raw material is consumed by chloroplast
[ "flour", "stone", "CO2", "lava" ]
C
In the photosynthesis process carbon dioxide has the role of raw material
sciq
sciq_01_05267
Chemical and physical changes in a system may be accompanied by an increase or a decrease in the disorder of the system, corresponding to an increase or decrease in what?
[ "entropy", "volume", "enthalpy", "vibration" ]
A
Chemical and physical changes in a system may be accompanied by either an increase or a decrease in the disorder of the system, corresponding to an increase in entropy (ΔS> 0) or a decrease in entropy (ΔS < 0), respectively. As with any other state function, the change in entropy is defined as the difference between th...
sciq
sciq_01_04267
What occurs when arterioles lose their normal muscular tone and dilate dramatically?
[ "respiration shock", "congenital shock", "cardio shock", "vascular shock" ]
D
• Vascular shock occurs when arterioles lose their normal muscular tone and dilate dramatically. It may arise from a variety of causes, and treatments almost always involve fluid replacement and medications, called inotropic or pressor agents, which restore tone to the muscles of the vessels. In addition, eliminating o...
medmcqa
medmcqa_05_02536
Saturated fatty acid is present in high quantity ?
[ "Coconut oil", "Sunflower oiI", "Safflower oil", "Soyabeen" ]
A
Ans. is 'a' i.e., Coconut oil
math_qa
mathqa_03_03957
each child has 2 pencils and 13 skittles . if there are 8 children , how many pencils are there in total ?
[ "16", "12", "18", "22" ]
A
2 * 8 = 16 . answer is a .
openbookqa
obqa_02_02276
The diminishing supply of this nonrenewable resource is leading to advancements in automotive technology
[ "petrol", "coal", "trees", "steam" ]
A
fossil fuels are a nonrenewable resource
medmcqa
medmcqa_05_01556
Immunoglobulin that activates the alternate complement pathway is:
[ "Ig A", "Ig G", "Ig M", "Ig E" ]
A
(Refer: Ananthanarayanan and Paniker’s Textbook of Microbiology, 8th edition, pg no: 94–96)   Immunoglobulin nuggets
sciq
sciq_01_09914
What two elements primarily make up the sun?
[ "hydrogen and helium", "oxygen and hydrogen", "nitrogen and argon", "calcium and helium" ]
A
The Sun is made almost entirely of the elements hydrogen and helium. The Sun has no solid material. Most atoms in the Sun exist as plasma . Plasma is superheated gas with an electrical charge. Because the Sun is made of gases, it does not have a defined outer boundary. Like Earth, the Sun has an internal structure. The...
math_qa
mathqa_03_00435
8.008 / 2.002
[ "0.004", "0.04", "4", "40" ]
C
"answer is 4 , move the decimal forward three places for both numerator and denominator or just multiply both by a thousand . the result is 8008 / 2002 = 4 answer c"
math_qa
mathqa_03_01890
the radius of a cylinder is 12 m , height 21 m . the lateral surface area of the cylinder is :
[ "1584'", "1854'", "1458'", "1485'" ]
A
lateral surface area = 2 π rh = 2 × 22 / 7 × 12 × 21 = 44 × 36 = 1584 m ( power 2 ) answer is a .
sciq
sciq_01_11408
What is often a result of untreated atherosclerosis?
[ "seizures", "heart disease", "a heart attack or stroke", "cancer" ]
C
openbookqa
obqa_02_01946
In order for food to keep safely, chemicals are used on them. This makes them what?
[ "be saltier", "longer lasting", "grow faster", "taste sweeter" ]
B
bacteria cause food poisoning
math_qa
mathqa_03_00635
an outlet pipe empties a tank which is full in 10 hours . if the inlet pipe is kept open , which lets liquid in at the rate of 8 litres / min then outlet pipe would take 6 hours longer . find the capacity of the tank .
[ "8600 litres", "12800 litres", "12100 litres", "11200 litres" ]
B
"let the rate of outlet pipe be x liters / hour ; rate of inlet pipe is 8 litres / min , or 8 * 60 = 480 liters / hour ; net outflow rate when both pipes operate would be x - 480 liters / hour . capacity of the tank = x * 10 hours = ( x - 480 ) * ( 10 + 6 ) hours 10 x = ( x - 480 ) * 16 - - > x = 1280 - - > capacity = ...
medmcqa
medmcqa_05_04842
Not a manifestation of non proliferative diabetic retinopathy
[ "Drusens", "Hard exudates", "Dot blot haemorrhage", "Cotton wool spots" ]
A
Drusens are pathognomic of dry ARMD and not diabetic retinopathy Manifestations OF non proliferative diabetic retinopathy - a. Microaneurysm: Saccular outpouchings of the vessel wall due to loss of pericytes b. Dot blot haemorrhage: Due to break of wall of microaneurysm in the deep layers c. Superficial haemorrhage: ha...
math_qa
mathqa_03_00655
find the 21 th term of an arithmetic progression whose first term is 3 and the common difference is 5 .
[ "100", "102", "103", "150" ]
C
"n th term of a . p = a + ( n - 1 ) * d = 3 + ( 21 - 1 ) * 5 , = 3 + 100 = 103 . answer : c"
math_qa
mathqa_03_02015
sum of the numbers from 1 to 29 is
[ "400", "430", "435", "405" ]
C
explanation : sum of first n natural numbers = 1 + 2 + 3 + . . . . . n = n ( n + 1 ) / 2 substitute n = 29 . so s 20 = 29 ã — 30 / 2 = 435 correct option : c
math_qa
mathqa_03_03100
a not - so - good clockmaker has four clocks on display in the window . clock # 1 loses 17 minutes every hour . clock # 2 gains 15 minutes every hour relative to clock # 1 ( i . e . , as clock # 1 moves from 12 : 00 to 1 : 00 , clock # 2 moves from 12 : 00 to 1 : 15 ) . clock # 3 loses 20 minutes every hour relative to...
[ "5 : 00", "5 : 34", "5 : 42", "6 : 00" ]
B
c 1 loses 15 minutes every hour . so after 60 minutes have passed , c 1 displays that 60 - 15 = 45 minutes have passed . c 2 gains 15 minutes for every 60 minutes displayed on c 1 . thus , the time displayed on c 2 is 75 / 60 = 5 / 4 the time displayed on c 1 . so after 60 minutes have passed , c 2 displays the passing...
math_qa
mathqa_03_04438
a train 120 m long running at 72 kmph crosses a platform in 25 sec . what is the length of the platform ?
[ "443 m", "354 m", "450 m", "380 m" ]
D
"d 350 d = 72 * 5 / 18 = 25 = 500 â € “ 120 = 380"
openbookqa
obqa_02_01777
A plant will be able to photosynthesize even better when
[ "it spreads out leaves flat", "leaves leaves on fire", "it makes leaves curl up", "opens leaves inside out" ]
A
as flatness of a leaf increases , the amount of sunlight that leaf can absorb will increase
medmcqa
medmcqa_05_03467
High infectivity in Hepatitis infection is shown by:
[ "HBsAg positive", "HBcAg positive", "HBeAg positive", "IgM anti HBc" ]
C
Ans: c (HBeAg positive) Ref: Ananthanarayanan, 7th ed, p. 555HBsAg positive - Indicates HBV infection- First virological marker detectableHBsAg positive; IgM Anti HBc positiveHBsAg positive; IgG Anti HBc positiveHBeAg positiveHBVDNAAnti HBsAg positive; Anti HBc negativeAnti HBsAg positive; IgG Anti HBc cpositive- Activ...
sciq
sciq_01_05298
What is the largest mineral group, comprising over 90% of earth's crust?
[ "soils", "oxides", "silicates", "carbonates" ]
C
Silicates are the largest mineral group. About 1,000 silicate minerals are known. Silicate minerals are also extremely common. They make up over 90% of Earth's crust!.
sciq
sciq_01_09513
In which part of a bird stomach is food stored, soaked and mechanically ground?
[ "digestion", "pancreas", "Gall bladder", "gizzard" ]
D
Avian Birds face special challenges when it comes to obtaining nutrition from food. They do not have teeth and so their digestive system, shown in Figure 34.7, must be able to process un-masticated food. Birds have evolved a variety of beak types that reflect the vast variety in their diet, ranging from seeds and insec...
medmcqa
medmcqa_05_04401
Only hepatitis virus which can be cultured is
[ ">HAV", ">HBV", ">HDV", ">HCV" ]
A
HAV Hepatitis A virus can be grown in some human and simian cultures and it is the only human hepatitis virus which can be cultivated in vitro. It has also been cloned.
openbookqa
obqa_02_02217
Which is most likely to occur?
[ "a female fly lays eggs while it is an adult", "a female fly lays eggs while it is a larvae", "a male fly lays eggs while it is an adult", "a male fly lays eggs while it is a larvae" ]
A
a female insect lays eggs during the adult stage of an insect 's life cycle
sciq
sciq_01_01279
In animals, what process occurs only in germ cells, which are in the ovaries or testes?
[ "mitosis", "reproduction", "electrolysis", "meiosis" ]
D
openbookqa
obqa_02_03581
An example of conservation is
[ "jogging", "reducing ethanol use", "hiking", "raking leaves" ]
B
An example of conservation is not using fossil fuel
math_qa
mathqa_03_01281
a retailer buys a radio for rs 225 . his overhead expenses are rs 30 . he sellis the radio for rs 300 . the profit percent of the retailer is
[ "10 %", "50 %", "25 %", "17.6 %" ]
D
"explanation : cost price = ( 225 + 30 ) = 255 sell price = 300 gain = ( 45 / 255 ) * 100 = 17.6 % . answer : d"
sciq
sciq_01_02320
According to the octet rule, magnesium is unstable because its valence shell has just two of what?
[ "neutrons", "quarks", "protons", "electrons" ]
D
Chapter 2 1 The mass number is the total number of protons and neutrons in the nucleus of an atom. 3 The water hydrolyses, or breaks, the glycosidic bond, forming two monosaccharides. 4 D 6 A 8 B 10 C 12 B 14 A 16 C 18 A 20 B 22 D 24 B 26 A 28 B 30 D 32 B 33 These four elements—oxygen, carbon, hydrogen, and nitrogen—to...
medmcqa
medmcqa_05_00294
Placental ALP is used as tumor marker of
[ "Seminoma", "Choricarcinoma", "Teratoma", "Lymphoma" ]
A
Ans a: (Ref: Robbins 7th edition 1041-42)Testicular tumorsTumor markers1 SeminomaPlacental ALP2 Embryonal carcinomahC'GAFP3 Yolk sac tumor (endodermal sinus tumor)AFP, Alpha 1 AT4 ChoriocarcinomahCGSeminomaMost common type germ cell tumor of testis(50%)Female counterpart is dysgerminoma. Tumor is positive for placental...
sciq
sciq_01_06466
Burning gas to run our cars is an example of how human activity is contributing to what global event?
[ "metamorphic change", "carbon change", "ozone change", "climate change" ]
D
Flickr:futureatlas. com (http://futureatlas. com/blog/). Human activities like burning gasoline in cars are contributing to a global change in our climate . CC BY 2.0.
openbookqa
obqa_02_03350
Overpopulation may result
[ "from the deaths of many organisms", "from a boom in reproduction of an organism", "from natural predators hunting organisms", "from organisms self regulating their population" ]
B
if the population of an organism increases then the ecosystem may become overpopulated with that organism
math_qa
mathqa_03_04776
lilly has 10 fish and rosy has 8 fish . in total , how many fish do they have in all ?
[ "12", "14", "16", "18" ]
D
"10 + 8 = 18 the answer is d ."
math_qa
mathqa_03_02812
the average of marks obtained by 120 boys was 37 . if the average of marks of passed boys was 39 and that of failed boys was 15 , the number of boys who passed the examination is ?
[ "100", "110", "120", "130" ]
B
let the number of boys who passed = x . then , 39 x x + 15 x ( 120 - x ) = 120 x 37 24 x = 4440 - 1800 = > x = 2640 / 24 x = 110 . hence , the number of boys passed = 110 . answer : b
sciq
sciq_01_03192
The process of producing mature sperm is called what?
[ "glycogenolysis", "ketoacidosis", "spermatosis", "spermatogenesis" ]
D
The process of producing mature sperm is called spermatogenesis . Sperm are produced in the seminiferous tubules of the testes and become mature in the epididymis . The entire process takes about 9 to 10 weeks. You can watch an animation of spermatogenesis at this link: http://wps. aw. com/bc_martini_eap_4/40/10469/268...
sciq
sciq_01_00350
What do scientist's believe mercury's core is mostly made of?
[ "melted iron", "water", "helium gas", "quicksilver" ]
A
Figure below shows a diagram of Mercury’s interior. Mercury is one of the densest planets. Scientists think that the interior contains a large core made mostly of melted iron. Mercury's core takes up about 42% of the planet's volume. Mercury's highly cratered surface is evidence that Mercury is not geologically active.
medmcqa
medmcqa_05_01276
Absolute lymphocytosis seen in
[ "SLE", "Typhoid", "IMN", "Brucellosis" ]
C
.
math_qa
mathqa_03_03534
a shirt goes on sale for 80 % of its original price . one week later , the sale price is marked down 10 % . the final price is what percent of the original price ?
[ "72 %", "70 %", "52 %", "50 %" ]
A
"just assume original price is 100 . sale price = 80 then it is marked down by 10 % = 80 - 8 = 72 . hence it is 72 % of the original price . hence answer is a"
ARC-Easy
arc_04_00027
Which of the following properties provides the BEST way to identify a mineral?
[ "hardness", "shape", "size", "temperature" ]
A
null
medmcqa
medmcqa_05_04564
Which of the following teeth are not excluded from the scoring in Simplified Oral Hygiene Index (OHI-S)?
[ "Natural teeth with full crown restorations", "Surfaces reduced in height by caries", "Traumatized teeth", "Functional third molars" ]
D
The Simplified Oral Hygiene Index (OHI-S) was developed in 1964 by John C. Greene and Jack R. Vermillion.  Natural teeth with full crown restorations and surfaces reduced in height by caries or trauma are not scored. Third molars are  included only if they are functional
medmcqa
medmcqa_05_02221
Acedes aegypticus transmits -
[ "JE", "KFD", "Yellow fever", "Filaria" ]
C
aedes causes yellow fever,dengue,chickunguniya culex causes KFD,JE,filariasis anopheles -malaria
openbookqa
obqa_02_02166
Which of the following is an example of ecological succession?
[ "a group of horses slowly becomes extinct due to loss of habitat", "a group of rats in a lab learn to navigate a maze", "a soccer team trains for the championship", "Trees, insects, and birds in a forest grew from wildfire-ravaged lands" ]
D
ecological succession means entire communities in an ecosystem change over time
openbookqa
obqa_02_03637
All the food in the fridge is warm on a remote farm with a windmill. The most likely cause is
[ "it's a very windy day", "someone put a heat lamp in the fridge", "it's a windless day", "it's a warm day" ]
C
a windmill converts wind energy into electricity
sciq
sciq_01_07776
What paired organs together receive about 25 percent of cardiac output and are protected in the retroperitoneal space by the renal fat pad and overlying ribs and muscle?
[ "hands", "brain", "lungs", "kidneys" ]
D
25.3 Gross Anatomy of the Kidney As noted previously, the structure of the kidney is divided into two principle regions—the peripheral rim of cortex and the central medulla. The two kidneys receive about 25 percent of cardiac output. They are protected in the retroperitoneal space by the renal fat pad and overlying rib...
sciq
sciq_01_04463
Many adolescents experience frequent mood swings. name one of the causes for this.
[ "growing hormones", "maturing nervous system", "surging hormones", "psychological changes" ]
C
Adolescents may have mood swings because of surging hormones.
medmcqa
medmcqa_05_03642
When asked about his impending heart operation, patient recollects the entire procedures in detail. He seems well versed & on asking, says that he has been reading everything he can about it. He discusses the details for hours, but shows no emotional reaction to the operation. The defense mechanism most likely used her...
[ "Rationalization", "Repression", "Regression", "Intellectualization" ]
D
Ans. D. IntellectualizationRather than responding with the expected level of apprehension and anxiety, the patient spends his time reading and cognitive activity. Anxiety is replaced by cognitive activity.
math_qa
mathqa_03_03078
if the function q is defined by the formula q = 5 w / ( 4 vf ( z ^ 2 ) ) , by what factor will q be multiplied if w is quadrupled , f is doubled , and z is tripled ?
[ "1 / 9", "2 / 9", "4 / 9", "3 / 9" ]
B
"we just need to find the factor thats all , w - > quadrupled - > 4 w f - > doubled - > 2 f z - > tripled - > 3 z hence , z ^ 2 = 9 z ^ 2 w is in numerator , and f * z in denominator . hence , additional factor being introduced = 4 / 2 * 9 = 4 / 18 = 2 / 9 = b"
math_qa
mathqa_03_03905
if i earn a profit 50 $ in a day and i have 9 employees . after keeping 10 percent profit for me , and distribute remianing money equally among my employees then how much each employee would get ?
[ "$ 3", "$ 7", "$ 1", "$ 5" ]
D
since i earned $ 50 sp 10 percent would be 5 $ and 45 $ would remain . dividing 45 by 9 , each employee would get 5 $ each and hince option d is correct .
openbookqa
obqa_02_03796
a solar panel converts astral radiation into electricity which charges a rechargeable battery that can go into an
[ "cupcake", "rock", "illuminated police baton", "stick" ]
C
a solar panel converts sunlight into electricity
sciq
sciq_01_03150
When the hydrogen is nearly used up, the star can fuse which element into heavier elements?
[ "xenon", "helium", "oxygen", "carbon" ]
B
Within a nebula, there are varying regions where gravity has caused the gas and dust to clump together. The gravitational attraction of these clumps pull more atoms into the clump. As this accretion continues, the gas pressure increases and the core of the protostar gets hotter and hotter. If the protostar gets dense e...
openbookqa
obqa_02_02830
Plankton can be the food as well as the creator of
[ "water", "magic", "nourishment", "alcohol" ]
C
In the food chain process some types of plankton have the role of producer
math_qa
mathqa_03_01919
a certain car dealership sells economy cars , luxury cars , and sport utility vehicles . the ratio of economy to luxury cars is 5 : 4 . the ratio of economy cars to sport utility vehicles is 3 : 2 . what is the ratio of luxury cars to sport utility vehicles ?
[ "9 : 8", "8 : 9", "6 : 5", "2 : 3" ]
C
"the ratio of economy to luxury cars is 5 : 4 - - > e : l = 5 : 4 = 15 : 12 . the ratio of economy cars to sport utility vehicles is 3 : 2 - - > e : s = 3 : 2 = 15 : 10 . thus , l : s = 12 : 10 = 6 : 5 . answer : c ."
sciq
sciq_01_01016
What type of thin lava forms shapes and tubes as it flows?
[ "xeric", "spicule", "xerophyte", "pāhoehoe" ]
D
Pāhoehoe lava is thinner than a'a, and flows more readily. Its surface looks more wrinkly and smooth. Pāhoehoe lava flows in a series of lobes that form strange twisted shapes and natural rock sculptures ( Figure below ). Pāhoehoe lava can form lava tubes. The outer layer of the lava flow cools and solidifies. The inne...
sciq
sciq_01_05282
What are substances that cannot be broken down into simpler substances with different properties called?
[ "compounds", "elements", "molecules", "atoms" ]
B
Elements are substances that cannot be broken down into simpler substances with different properties.
math_qa
mathqa_03_00910
in what proportion must flour at $ 0.8 per pound be mixed with flour at $ 0.9 per pound so that the mixture costs $ 0.835 per pound ?
[ "1 : 3", "1 : 2", "1 : 1", "2 : 1" ]
D
"using weighted average method : let x be the proportion in which the $ 0.8 per pound flour is mixed with $ 0.9 per pound flour . thus 0.8 * x + 0.9 * ( 1 - x ) = 0.835 0.9 – 0.1 x = 0.835 x = 0.65 thus ratio of both flours is 2 : 1 d"
ARC-Easy
arc_04_02095
Which of the following processes is an important part of star formation?
[ "nuclear fusion", "nuclear fission", "molecular fusion", "molecular fission" ]
A
null
medmcqa
medmcqa_05_04172
A 45 years old male patient a known case of Crohn's disease presents with recent flare-ups suggestive of fistulas. He was admitted and treated with immune-suppressive. Unfortunately, he got reactivation of his tuberculosis as a result of the side effects of the treatment. Which of the following immunosuppressive medica...
[ "Methotrexate", "Infliximab", "Azathioprine", "Mizorbine" ]
B
Answer: b) InfliximabTREATMENT OF INFLAMMATORY BOWEL DISEASEAminosalicylates* 5-aminosalicylic acid (formulations known as mesalamine): acts topically in the colon.* Sulfasalazine (5-ASA + sulphapyridine), olsalazine (5-ASA+5-ASA) and balsalazide (5-ASA+ amino benzoyl Alanine) are effective for the treatment of ulcerat...
sciq
sciq_01_02872
The invention of what instrument in the 1930s allowed scientists to see viruses for the first time?
[ "electron microscope", "magnifying glass", "spy glass", "telescopes" ]
A
Scientists did not actually see viruses for the first time until the 1930s. That’s when the electron microscope was invented. In 1915, English bacteriologist Frederick Twort discovered bacteriophage , the viruses that attack bacteria. He noticed tiny clear spots within bacterial colonies, and hypothesized that somethin...
math_qa
mathqa_03_02647
a student committee on academic integrity has 72 ways to select a president and vice president from a group of candidates . the same person can not be both president and vice president . how many candidates are there ?
[ "7", "8", "9", "10" ]
C
"xc 1 * ( x - 1 ) c 1 = 72 x ^ 2 - x - 72 = 0 ( x - 9 ) ( x + 8 ) = 0 x = 9 , - 8 - 8 ca n ' t possible . c"
sciq
sciq_01_09948
Many innovative farming methods can prevent what type of erosion, which is especially important in agriculture?
[ "soil erosion", "plains erosion", "fertilizer erosion", "vegetable erosion" ]
A
There are many farming methods that help prevent soil erosion.
openbookqa
obqa_02_01677
Our only satellite is found with the other
[ "nine planets", "nebula", "red giant stars", "Andromeda galaxy" ]
A
the solar system contains the moon
math_qa
mathqa_03_02301
a reduction of 12 % in the price of oil enables a house wife to obtain 6 kgs more for rs . 1200 , what is the reduced price for kg ?
[ "24", "27", "40", "28" ]
A
"1200 * ( 12 / 100 ) = 144 - - - - 6 ? - - - - 1 = > rs . 24 answer : a"
sciq
sciq_01_05670
Color, temperature, and solubility are examples of what type of property?
[ "minimal", "severe", "susceptible", "intensive" ]
D
Color, temperature, and solubility are examples of intensive properties.
sciq
sciq_01_05699
Kidneys, large intestine, liver, skin, and lungs comprise which system?
[ "Digestive system", "Muscular system", "Lymphatic system", "excretory system" ]
D
Organs of excretion make up the excretory system. They include the kidneys, large intestine, liver, skin, and lungs.
ARC-Challenge
arc_04_02691
Which results in a chemical change?
[ "A student smells a flower.", "A teacher lights a candle.", "A student colors a paper blue.", "A teacher feels a rough cloth." ]
B
null
sciq
sciq_01_08620
Structural rearrangements of what include partial duplications, deletions, inversions, and translocations; duplications and deletions often produce offspring that survive but exhibit physical and mental abnormalities?
[ "chromosomes", "neutrons", "phenotypes", "cells" ]
A
Chromosome Structural Rearrangements Cytologists have characterized numerous structural rearrangements in chromosomes, including partial duplications, deletions, inversions, and translocations. Duplications and deletions often produce offspring that survive but exhibit physical and mental abnormalities. Cri-du-chat (fr...
sciq
sciq_01_04560
The structure of the boeing 787 has been described as essentially one giant macromolecule, where everything is fastened through cross-linked chemical bonds reinforced with this?
[ "metal-metal bonds", "nitrogen fiber", "non-covalent interaction", "carbon fiber" ]
D
carbon fiber–epoxy and boron fiber–epoxy composites. Compared with metals, these materials are 25%– 50% lighter and thus reduce operating costs. Similarly, the space shuttle payload bay doors and panels are made of a carbon fiber–epoxy composite. The structure of the Boeing 787 has been described as essentially one gia...
sciq
sciq_01_07192
Comparisons of amino acid sequences can shed light on the evolutionary divergence of what?
[ "dinosaurs", "mammals", "related species", "birds" ]
C
medmcqa
medmcqa_05_03857
Child begins to sit with suppo, able to transfer objects from one hand to another hand and speak monosyllabic babbles at the age of
[ "3 months", "6 months", "9 months", "12 months" ]
B
<p>. Developmental milestones:- GROSS MOTOR DEVELOPMENT: 2 months: Holds head in plane of rest of the body when held in ventral suspension. In prone position in bed, the chin lifts momentarily. 3 months:lift head above the plane of the body. Head control stas by 3 months and fully developed by 5 months. 4 months:Remain...
openbookqa
obqa_02_00491
Humans go through multiple stages in their life. First is infancy, last is
[ "Stage 7", "being an adult", "high school", "puberty" ]
B
adulthood is a stage in the life cycle process
ARC-Easy
arc_04_01892
Which of these particles, when found in soil, contributes most to the water retention in soil?
[ "gravel", "sand", "silt", "clay" ]
D
null