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math_qa
mathqa_03_00392
xy = 1 then what is ( 7 ^ ( x + y ) ^ 2 ) / ( 7 ^ ( x - y ) ^ 2 )
[ "2401", "4", "8", "16" ]
A
"( x + y ) ^ 2 - ( x - y ) ^ 2 ( x + y + x - y ) ( x + y - x + y ) ( 2 x ) ( 2 y ) 4 xy 4 7 ^ 4 = 2401 answer a"
medmcqa
medmcqa_05_03521
The type of radiographic projection given below is:
[ "PA view", "Reverse towne's view", "Submentovertex view", "Waters projection" ]
B
Reverse towne's view Image Receptor and Patient Placement The image receptor is placed in front of the patient, perpendicular to the midsagittal plane and parallel to the coronal plane. The patient’s head is tilted downward so that the canthomeatal line forms a 25-degree to 30 degree angle with the image receptor. To i...
medmcqa
medmcqa_05_00792
Epiphysis involved in which bone tumor -
[ "Osteosarcoma", "Multiple myeloma", "Giant cell tumor", "Ewing's sarcoma" ]
C
Ans. is 'c' i.e., Giant cell tumor o Epiphyseal tumors are : Chondroblastoma. Giant cell tumor (osteoclastoma), Clear cell chondrosaroma.
openbookqa
obqa_02_01203
What is animal competition?
[ "wolves and bears eating salmon", "a shark and marlin swimming fast", "gazelles and zebras living on the plains", "an oxpecker helping a rhino" ]
A
if two animals eat the same prey then those animals compete for that pey
openbookqa
obqa_02_01267
Large Stag that are hunted prefer to live in the
[ "space", "ocean", "desert", "timberland" ]
D
a deer lives in a forest
openbookqa
obqa_02_02197
Which is likeliest to be true?
[ "octopuses are found in the jungle", "birds are found in the deep ocean waters", "sheep are found high in the tree", "seaweed is found in the shallow waters near the beach" ]
D
aquatic plants live in bodies of water
sciq
sciq_01_09017
What is the final stage of cell division in eukaryotes as well as prokaryotes?
[ "cytokinesis", "electrolysis", "mitosis", "anaphase" ]
A
Cytokinesis is the final stage of cell division in eukaryotes as well as prokaryotes. During cytokinesis, the cytoplasm splits in two and the cell divides. Cytokinesis occurs somewhat differently in plant and animal cells, as shown in Figure below . In animal cells, the plasma membrane of the parent cell pinches inward...
sciq
sciq_01_09192
What type of chemicals do ants communicate with?
[ "hormones", "pheromones", "pesticides", "Alkanes" ]
B
We must use energy to get energy resources. This is true of non-renewable and renewable energy. Getting fossil fuels so that they can be used takes many steps. All of these steps use energy.
sciq
sciq_01_11651
Ectotherms undergo a variety of changes at the cellular level to acclimatize to shifts in what?
[ "volume", "altitude", "temperature", "density" ]
C
There are 44 autosomes and 2 sex chromosomes in the human genome, for a total of 46 chromosomes (23 pairs). Sex chromosomes specify an organism's genetic sex. Humans can have two different sex chromosomes, one called X and the other Y. Normal females possess two X chromosomes and normal males one X and one Y. An autoso...
medmcqa
medmcqa_05_02656
McAfee and Johnson regimen is used for:
[ "Eclampsia", "Placenta previa", "Placental abruption", "Placenta accrete" ]
B
Ans. (b) Placenta previaRef.: D.C. Dutta 8th ed. / 290, Williams 22nd ed./822-823* MacAfee and Johnson Regimen is a Conservative Management in Placenta Previa: This consists of complete bed rest, tocolysis, and close observation of patient.* Steroids are generally given to enhance lung maturity.* To undertake this regi...
math_qa
mathqa_03_04186
water consists of hydrogen and oxygen , and the approximate ratio , by mass , of hydrogen to oxygen is 2 : 16 . approximately how many grams of oxygen are there in 135 grams of water ?
[ "120", "116", "112", "108" ]
A
"( 16 / 18 ) * 144 = 120 grams the answer is a ."
ARC-Easy
arc_04_00261
Which tool is most responsible for preventing future pandemics of smallpox?
[ "worldwide vaccination for smallpox", "global education about smallpox", "better worldwide urban sanitation", "improved global quarantine facilities" ]
A
null
medmcqa
medmcqa_05_00310
Carbohydrate tumor marker for breast cancer:
[ "CA 15-3", "CA 125", "CA 34", "CA 19-9" ]
A
Carbohydrate-rich tumor markers are specific antigens found either on the surface of tumor cells or may also be secreted as products by the tumor cells. CA: carbohydrate antigen/cancer antigen. Specific Proteins Immunoglobulins Multiple myeloma and other gammopathies Prostate-specific antigen and prostate-specific memb...
math_qa
mathqa_03_04494
a train is moving at 6 / 7 of its usual speed . the train is 10 minutes too late . what is the usual time ( in hours ) for the train to complete the journey ?
[ "0.5", "1", "1.5", "2" ]
B
"new time = d / ( 6 v / 7 ) = 7 / 6 * usual time 10 minutes represents 1 / 6 of the usual time . the usual time is 1 hour . the answer is b ."
math_qa
mathqa_03_01092
in a tree , 3 / 7 of the birds are robins while the rest are bluejays . if 1 / 3 of the robins are female and 3 / 5 of the bluejays are female , what fraction of the birds in the tree are male ?
[ "11 / 35", "14 / 35", "18 / 35", "31 / 70" ]
C
"the fraction of birds that are male robins is ( 2 / 3 ) ( 3 / 7 ) = 2 / 7 . the fraction of birds that are male bluejays is ( 2 / 5 ) ( 4 / 7 ) = 8 / 35 . the total fraction of male birds is 2 / 7 + 8 / 35 = 18 / 35 . the answer is c ."
math_qa
mathqa_03_03114
a sells a bicycle to b at a profit of 30 % and b sells it to c at a loss of 20 % . find the resultant profit or loss .
[ "5 %", "4 %", "- 4 %", "- 12 %" ]
B
the resultant profit or loss = 30 - 20 - ( 30 * 20 ) / 100 = 4 % profit = 4 % answer is b
sciq
sciq_01_03201
What processes involve a transfer of electrons between the wire and the solution?
[ "thermal", "radioactive", "magnetic", "electrochemical" ]
D
Electrochemistry is the study of chemical processes that occur at the interface between an electron conductor, such as a wire, and a solution of electrolytes, which is often simply an ionic substance dissolved in water. Electrochemical processes involve a transfer of electrons between the wire and the solution. These r...
math_qa
mathqa_03_02403
a train with a length of 100 meters , is traveling at a speed of 72 km / hr . the train enters a tunnel 2.3 km long . how many minutes does it take the train to pass through the tunnel from the moment the front enters to the moment the rear emerges ?
[ "2.0", "2.5", "3.0", "3.5" ]
A
72 km / hr = 1.2 km / min the total distance is 2.4 km . 2.4 / 1.2 = 2 minutes the answer is a .
math_qa
mathqa_03_04545
marcella has 23 pairs of shoes . if she loses 9 individual shoes , what is the greatest number of matching pairs she could have left ?
[ "21", "20", "19", "18" ]
D
marcella has 23 pairs of shoes and loses 9 shoes . to minimize the loss of identical pairs of shoes we want marcella to lose as many identical pairs as possible . this would yield 4 identical pairs and 1 additional shoe ( destroying 5 pairs of shoes ) . the 23 pairs of shoes minus the 5 ' destroyed ' pairs yields 20 pa...
math_qa
mathqa_03_03086
how many trailing zeroes does 53 ! + 54 ! have ?
[ "12", "13", "14", "15" ]
B
53 ! + 54 ! = 53 ! + 54 * 53 ! = 53 ! ( 1 + 54 ) = 53 ! * 55 number of trailing 0 s in 53 ! = number of 5 s in the expansion of 53 ! = 10 + 2 = 12 there is 1 more 5 in 55 . hence , total number of trailing 0 s = 12 + 1 = 13 answer ( b ) . in most cases , when we are adding multiple terms , all of which have trailing 0 ...
medmcqa
medmcqa_05_00528
Maintaining sick role by any means is a characteristic feature of:
[ "Hypochondriasis", "Somatization disorder", "Conversion disorder", "Factitious disorder" ]
D
Factitious disorder - willful production of symptoms to get medical attention Factitious disorder differs from malingering in that it does not bring any external reward such as avoidance of military or other occupational duties, or financial compensation. The main aim is to gain attention There is no specific treatment...
math_qa
mathqa_03_02357
for any positive integer n , the sum of the first n positive integers equals n ( n + 1 ) / 2 . what is the sum of odd all the integers between 1 and 50 ?
[ "500", "625", "750", "550" ]
B
"numbers are 1 , 3,5 - - - - - - - , 47,49 average of the set : ( largest + smallest ) / 2 = ( 49 + 1 ) / 2 = 25 ; # of terms : ( largest - smallest ) / 2 + 1 = ( 49 - 1 ) / 2 + 1 = 25 the sum = 25 * 25 = 625 answer : b"
ARC-Easy
arc_04_02031
When a boy stands in a field in the sunlight, he usually is able to see his
[ "weight", "temperature", "reflection", "shadow" ]
D
null
sciq
sciq_01_01115
What is the set of steps that scientists use to learn about the world?
[ "philosophic method", "rhythm method", "scientific method", "Socratic method" ]
C
Sometime in your life you've asked a question about the world around you. Probably you've asked a lot of questions over the years. The best way to answer questions about the natural world is by using science. Scientists ask questions every day, and then use a set of steps to answer those questions. The steps are known ...
math_qa
mathqa_03_01779
a , b and c start a business with each investing rs 20000 . after 5 months a withdraws rs 5000 , b withdraws rs 4000 and c invests rs 6000 more . at the end of the year , a total profit of rs 69900 was recorded . find the share of a .
[ "20000", "21500", "20500", "22000" ]
C
a : b : c = ( 20000 × 5 + 15000 × 7 ) : ( 20000 × 5 + 16000 × 7 ) : ( 20000 × 5 + 26000 × 7 ) = ( 20 × 5 + 15 × 7 ) : ( 20 × 5 + 16 × 7 ) : ( 20 × 5 + 26 × 7 ) = 205 : 212 : 282 a ' s share = 69900 × 205 / ( 205 + 212 + 282 ) = 69900 × 205 / 699 = 20500 answer is c .
openbookqa
obqa_02_01121
Where would you hear sound reflecting off surfaces?
[ "canyon", "outer space", "in the ocean", "in a vacuum" ]
A
echo is when sound reflects off of a surface
openbookqa
obqa_02_01925
You may be able to make musical instruments from
[ "A paperclip", "air", "water", "grass" ]
A
An example of playing a musical instrument is strumming a guitar string
math_qa
mathqa_03_04182
a certain drink of type a is prepared by mixing 4 parts milk with 3 parts fruit juice . another drink of type b is prepared by mixing 4 parts of fruit juice and 3 parts of milk . how many liters of fruit juice must be added to 42 liters of drink a to convert it to drink b ?
[ "7", "9", "12", "14" ]
D
in 42 liters of drink a , there are 24 liters of milk and 18 liters of juice . with 24 liters of milk , we need a total of 32 liters of juice to make drink b . we need to add 14 liters of juice . the answer is d .
ARC-Challenge
arc_04_02830
A container is filled with 250 milliliters of water. The total mass of the container and the water is 300 grams. What is the total mass of the container and the water after being in a freezer for 2 hours?
[ "50 grams", "250 grams", "300 grams", "550 grams" ]
C
null
sciq
sciq_01_04504
What is the vertical extent of ocean water called?
[ "oceanic pillar", "ocean column", "water row", "water column" ]
D
Scientists refer to the vertical extent of ocean water as the water column . Two main zones based on depth of water are the photic zone and aphotic zone. The photic zone is the top 200 meters of water. The aphotic zone is water deeper than 200 meters. The deeper you go, the darker the water gets. That’s because sunligh...
math_qa
mathqa_03_02567
300 meter long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds . what is the length of the platform ?
[ "388", "266", "350", "112" ]
C
speed = [ 300 / 18 ] m / sec = 50 / 3 m / sec . let the length of the platform be x meters . then , x + 300 / 39 = 50 / 3 3 ( x + 300 ) = 1950 è x = 350 m . answer : c
ARC-Easy
arc_04_00977
A class learns about weather. The students in the class measure the outside air temperature at the same time each day. Which way of measuring the temperature would provide the most accurate data?
[ "taking the measurement in the shade", "placing the thermometer on the ground", "taking a measurement using a different tool each day", "recording the measurements from three thermometers" ]
D
null
sciq
sciq_01_11325
Living species of chordates are classified into three major subphyla: vertebrata, urochordata, and what?
[ "cephalochordata", "invertebrates", "xerophyte", "spirogyra" ]
A
Living species of chordates are classified into three major subphyla: Vertebrata, Urochordata, and Cephalochordata. Vertebrates are all chordates that have a backbone. The other two subphyla are invertebrate chordates that lack a backbone.
openbookqa
obqa_02_01507
A large turbine in a field can produce electricity to power devices when
[ "a breeze is floating", "a child is crying", "a dog is barking", "clouds are very thin" ]
A
wind is used for producing electricity
sciq
sciq_01_09832
Besides tasting food, what organ is necessary for mastication, deglutition (swallowing), and speech?
[ "mouth", "tongue", "larnyx", "throat" ]
B
Muscles That Move the Tongue Although the tongue is obviously important for tasting food, it is also necessary for mastication, deglutition (swallowing), and speech (Figure 11.11 and Figure 11.12). Because it is so moveable, the tongue facilitates complex speech patterns and sounds.
math_qa
mathqa_03_02408
( 753 x 753 + 247 x 247 - 753 x 247 ) / ( 753 x 753 x 753 + 247 x 247 x 247 ) = ?
[ "1 / 1000", "1 / 506", "253 / 500", "253 / 1000" ]
A
given exp . = ( a ^ 2 + b ^ 2 - ab ) / ( a ^ 3 + b ^ 3 ) = 1 / ( a + b ) = 1 / ( 753 + 247 ) = 1 / 1000 answer : a
sciq
sciq_01_05044
What is the major source of water vapor in the atmosphere?
[ "ocean", "sea", "drift", "streams" ]
A
Oceans are the major source of water vapor in the atmosphere. Sunlight heats water near the sea surface ( Figure below ). As the water warms, some of it evaporates. The water vapor rises into the air, where it may form clouds and precipitation. Precipitation provides the freshwater needed by plants and other living thi...
medmcqa
medmcqa_05_02489
Which of the following hepatitis viruses have significant perinatal transmission :
[ "Hepatitis E virus", "Hepatitis C virus", "Hepatitis B virus", "Hepatitis A virus" ]
C
Answer is C (Hepatitis B) Perinatal transmission is most significant with hepatitis B Perinatal transmission of various Hepatitis viruses as described in Harrison's Text: Hepatitis virus HAV HBV HCV HDV HEV Perinatal transmission - +++ - + . - Perinatal transmission with HCV is seen primarily with HIV co-infection and ...
sciq
sciq_01_01185
Sex-linked traits are located on genes on what chromosomes?
[ "neural", "sex", "dna", "reactive" ]
B
Sex-linked traits are located on genes on the sex chromosomes.
sciq
sciq_01_10814
Which compound has positively and negatively charged ends?
[ "polar compound", "non-polar compound", "real compound", "tumultuous compound" ]
A
Salt isn’t the only solute that dissolves in water. In fact, so many things dissolve in water that water is sometimes called the universal solvent. Water is such a good solvent because it is a very polar compound. A polar compound has positively and negatively charged ends. Solutes that are also charged are attracted t...
medmcqa
medmcqa_05_03541
Most radiosensitive organ is: March 2005
[ "Liver", "Fat", "Bone marrow", "Nervous tissue" ]
C
Ans. C: Bone Marrow Most radiosensitive organs: Bone marrow Gonads Growing cailage Prepubescent breast Organs with lowest radiosensitivity: Adrenal Vagina Uterus Pancreas
sciq
sciq_01_06254
What has two chains of nucleotides, one more than rna?
[ "mna", "gna", "dna", "fna" ]
C
RNA consists of just one chain of nucleotides. DNA consists of two chains. Nitrogen bases on the two chains of DNA form hydrogen bonds with each other. Hydrogen bonds are relatively weak bonds that form between a positively charged hydrogen atom in one molecule and a negatively charged atom in another molecule. Hydroge...
medmcqa
medmcqa_05_01809
Overhead abduction at shoulder joint is caused by which muscle -
[ "Deltoid", "Supraspinatus", "Serratus anterior", "Pectoralis major" ]
C
Ans. is 'c' i.e., Serratus anterior o Abduction is initiated by supraspinatus, which is responsible abduction upto 15deg. After that deltoid (acromial or middle fibers) is the major abductor upto 90deg of abduction. These two muscles, supraspinatus and deltoid are the prime movers for abduction. Overhead abduction (> 9...
sciq
sciq_01_07274
What common sea creature can be both awake and asleep at the same time?
[ "dolphins", "Whales", "reefs", "sharks" ]
A
math_qa
mathqa_03_00836
operation # is defined as adding a randomly selected two digit multiple of 8 to a randomly selected two digit prime number and reducing the result by half . if operation # is repeated 10 times , what is the probability that it will yield at least two integers ?
[ "0 %", "10 %", "20 %", "30 %" ]
A
any multiple of 8 is even . any two - digit prime number is odd . ( even + odd ) / 2 is not an integer . thus # does not yield an integer at all . therefore p = 0 . answer : a .
openbookqa
obqa_02_02268
A person wants to mine something that will attract metals. The person decides to search out some
[ "ceramic stones", "iron pebbles", "glass beads", "plastic beads" ]
B
iron is always magnetic
math_qa
mathqa_03_03107
by weight , liquid x makes up 0.8 percent of solution a and 1.8 percent of solution b . if 300 grams of solution a are mixed with 700 grams of solution b , then liquid x accounts for what percent of the weight of the resulting solution ?
[ "1.5 %", "1.9 %", "10 %", "15 %" ]
A
"i think there is a typo in question . it should have been ` ` by weight liquid ' x ' makes up . . . . . ` ` weight of liquid x = 0.8 % of weight of a + 1.8 % of weight of b when 300 gms of a and 700 gms of b is mixed : weight of liquid x = ( 0.8 * 300 ) / 100 + ( 1.8 * 700 ) / 100 = 15 gms % of liquid x in resultant m...
math_qa
mathqa_03_04536
solution for 4.75 + . 303 + . 432
[ "2.91", "5.911", "5.485", "5.986" ]
C
"4.75 + . 303 + . 432 = 0 0 = 0 - 4.75 - 0.303 - 0.432 0 = - 5.485 answer : c"
math_qa
mathqa_03_01717
car a runs at the speed of 35 km / hr & reaches its destination in 10 hr . car b runs at the speed of 25 km / h & reaches its destination in 6 h . what is the respective ratio of distances covered by car a & car b ?
[ "7 : 3", "5 : 7", "9 : 7", "3 : 5" ]
A
"sol . distance travelled by car a = 36 × 10 = 350 km distance travelled by car b = 25 × 6 = 150 km ratio = 350 / 150 = 7 : 3 a"
medmcqa
medmcqa_05_00489
The cause of larva currens:
[ "Strongyloides stercoralis", "Necator americanus", "Ankylostoma duodenale", "H. nana" ]
A
Ans. is 'a' i.e., Strongyloides stercoralis(Ref: Harrison, 19th/e, p.1415)* The migrating filariform larva of Strongyloides moves rapidly in a short line at the rate of 3-4 cm in an hour, hence it is termed "larva currens".
sciq
sciq_01_02670
What is a trait whose allele is found on a sex chromosome called?
[ "sex-linked trait", "gender trait", "genomic trait", "dimorphism - linked trait" ]
A
A sex-linked trait is a trait whose allele is found on a sex chromosome. The human X chromosome is significantly larger than the Y chromosome; there are many more genes located on the X chromosome than there are on the Y chromosome. As a result there are many more X-linked traits than there are Y-linked traits. Most se...
ARC-Challenge
arc_04_02355
A student uses clay to build models of an ocean plate and a continental plate. What characteristic cannot be accurately represented by the models?
[ "the shapes of plates", "the relative sizes of plates", "the relative densities of plates", "the arrangement of plates relative to one another" ]
C
null
openbookqa
obqa_02_03290
If silt and such is making its way down a flowing path
[ "water will flow backwards", "bugs will eat rocks", "sand will be stacked", "streams will be orange" ]
C
a sandbar is formed by water moving sediment downstream
sciq
sciq_01_08687
Which system consists of all the nervous tissue that lies outside the central nervous system?
[ "cerebral cortex", "auxiliary nervous system", "peripheral nervous system", "spinal cord" ]
C
The peripheral nervous system consists of all the nervous tissue that lies outside the central nervous system. It is connected to the central nervous system by nerves. It has several divisions and subdivisions that transmit nerve impulses between the central nervous system and the rest of the body.
medmcqa
medmcqa_05_03441
Which of the following is the most common hematological malignancy in children with Down syndrome?
[ "T-cell acute lymphoblastic leukemia", "Burkitt leukemia", "Acute promyelocytic leukemia", "Acute megakaryoblastic leukemia" ]
D
Children with trisomy 21 have a high risk of developing leukemia. There is 20-fold increased risk of developing acute B lymphoblastic leukemias. There is 500-fold increased risk of acute myeloid leukemias, most commonly, acute megakaryoblastic leukemia.
math_qa
mathqa_03_00104
a train running at the speed of 54 km / hr crosses a pole in 9 sec . what is the length of the train ?
[ "288", "279", "135", "272" ]
C
"speed = 54 * 5 / 18 = 15 m / sec length of the train = speed * time = 15 * 9 = 135 m answer : c"
medmcqa
medmcqa_05_01233
Histological feature of lichen planus is ?
[ "Acantosis", "Interphase dermatitis", "Non specific", "Basal cell degeneration" ]
D
Ans. is `d>a' i.e., Basal cell degeneration > Acantosis The basic pathology in lichen planus is the damage to the basal cell layer of epidermis leading to hydropic degeneration of basal cells". --Venkataram Pie 59 Histopathologv in Lichen planus The basic pathology in lichen planus is the damage to the basal cell layer...
ARC-Easy
arc_04_00895
Which of the following allows materials to enter and leave a cell?
[ "cell wall", "mitochondria", "vacuole", "cell membrane" ]
D
null
sciq
sciq_01_03530
What are two other terms for dizygotic twins, which make good study subjects because they share many environmental conditions, but only about half of their polymorphisms?
[ "identical twins", "interdependant twins", "fractional", "fraternal, non-identical" ]
D
Dizygotic twins (fraternal or non-identical) share only about half of their polymorphisms. These twins are helpful to study as they tend to share many aspects of their environment. As they are born in the same place, usually within a few minutes of each other, they share many environmental conditions. They had the same...
math_qa
mathqa_03_02232
two trains of equal length , running with the speeds of 60 and 40 kmph , take 60 seconds to cross each other while they are running in the same direction . what time will they take to cross each other if they are running in opposite directions ?
[ "10 sec", "16 sec", "12 sec", "67 sec" ]
C
"rs = 60 - 40 = 20 * 5 / 18 = 100 / 18 t = 50 d = 60 * 100 / 18 = 1000 / 3 rs = 60 + 40 = 100 * 5 / 18 t = 1000 / 3 * 18 / 500 = 12 sec answer : c"
sciq
sciq_01_04673
Huge calderas form when the mountain above an empty chamber of what collapses?
[ "magma", "mercury", "gas", "coal" ]
A
During a massive eruption, all of the material may be ejected from a magma changer. Without support, the mountain above the empty chamber may collapse. This produces a huge caldera . Calderas are generally round, bowl-shaped formations ( Figure below ).
openbookqa
obqa_02_03611
What does a salamander eat?
[ "mice", "Venus flytraps", "fleas", "bats" ]
C
a salamander eats insects
sciq
sciq_01_04747
What is regulated to ensure that the correct proteins are made?
[ "variation expression", "gene expression", "Fat expression", "acids expression" ]
B
Gene expression is regulated to ensure that the correct proteins are made when and where they are needed. Regulation may occur at any point in the expression of a gene, from the start of transcription to the processing of a protein after translation. The focus in this lesson is the regulation of transcription.
math_qa
mathqa_03_01879
a question paper has 2 parts , a & b , each containing 5 questions . if a student has to choose 3 from part a & 4 from part b , in how many ways can he choose the questions ?
[ "50", "100", "152", "150" ]
A
"there 3 questions in part a out of which 4 question can be chosen as = 5 c 3 . similarly , 5 questions can be chosen from 10 questions of part b as = 5 c 4 . hence , total number of ways , = 5 c 3 * 5 c 4 = [ 5 ! / ( 2 ! 3 ! ) ] * [ 5 ! / ( 4 ! * 1 ) ] = { 10 } * { 5 * 4 ! / ( 4 ! ) } = 10 * 5 = 50 . a"
math_qa
mathqa_03_04896
15 lts are taken of from a container full of liquid a and replaced with liquid b . again 15 more lts of the mixture is taken and replaced with liquid b . after this process , if the container contains liquid a and b in the ratio 9 : 16 , what is the capacity of the container m ?
[ "a : 45", "b : 25", "c : 37.5", "d : 36" ]
C
"if you have a 37.5 liter capacity , you start with 37.5 l of a and 0 l of b . 1 st replacement after the first replacement you have 37.5 - 15 = 22.5 l of a and 15 l of b . the key is figuring out how many liters of a and b , respectively , are contained in the next 15 liters of mixture to be removed . the current rati...
openbookqa
obqa_02_04941
Which would be considered exhaustible?
[ "solar", "oil", "wind", "water" ]
B
solar energy is an inexhaustible resource
ARC-Easy
arc_04_00973
Many leaves appear green because the leaves
[ "resist green light.", "bend all colors except green.", "reflect green light.", "reflect all colors except green." ]
C
null
medmcqa
medmcqa_05_04270
Disaccharide not digested in intestine is -
[ "Sucrose", "Isomaltose", "Trehalose", "Sucralose" ]
D
Ans. is 'd' i.e., Sucralose* Carbohydrate digestion begins in the mouth with salivary amylase acting on starch and glycogen to form maltose (2 glucose residues with a l- 4 linkage), maltotriose (3 glucose residues with a 1- 4 linkages) and a dextrin (Multiple glucose residues with a 1- 6 linkages at branch points). The...
sciq
sciq_01_09299
Which protein, that stores oxygen in muscle cells, has been purified from a number of organisms?
[ "myoglobin", "potassium", "iodine", "melanin" ]
A
Myoglobin, a protein that stores oxygen in muscle cells, has been purified from a number of organisms. The protein from a sperm whale is composed of 153 amino acid units. What is the minimum number of nucleotides that must be present in the mRNA that codes for this protein?.
ARC-Easy
arc_04_01795
What is the mass number of an atom with 17 protons, 17 electrons, and 18 neutrons?
[ "17", "34", "35", "52" ]
C
null
openbookqa
obqa_02_00641
A flower may consider its entire point in living to be
[ "propagating the animal kingdom", "making new flowers bloom", "feeding bees and making honey", "spreading its genetic components around" ]
D
a flower 's purpose is to produce seeds
openbookqa
obqa_02_03615
riding a bike helps prevent
[ "music", "inflation", "environment harm", "economic stability" ]
C
riding a bike does not cause pollution
math_qa
mathqa_03_03711
the prices of tea and coffee per kg were the same in june . in july the price of coffee shot up by 20 % and that of tea dropped by 10 % . if in july , a mixture containing equal quantities of tea and coffee costs 50 / kg . how much did a kg of coffee cost in june ?
[ "45", "40", "35", "47.61" ]
D
let the price of tea and coffee be x per kg in june . price of tea in july = 1.2 x price of coffee in july = 0.9 x . in july the price of 1 / 2 kg ( 500 gm ) of tea and 1 / 2 kg ( 500 gm ) of coffee ( equal quantities ) = 50 1.2 x ( 1 / 2 ) + 0.9 x ( 1 / 2 ) = 50 = > x = 47.61 d
medmcqa
medmcqa_05_00771
Which of the following finger is having two dorsal interossei muscles:
[ "Index finger", "Little finger", "Middle finger", "Ring finger" ]
C
Ans. (c) Middle FingerRef: Grays Anatomy 41st Ed; Page No- 884* The four dorsal interossei muscles are bipennate in nature.* They are larger in size compare to palmar interossei.* They are arising from the adjacent sides of two metacarpal bones.* First two attach to radial side of proximal phalanx of index and middle f...
sciq
sciq_01_11155
Hypoxia is a condition of the reduced supply of what?
[ "methane", "nitrogen", "food", "oxygen" ]
D
Figure 10.14 The role of normal p53 is to monitor DNA and the supply of oxygen (hypoxia is a condition of reduced oxygen supply). If damage is detected, p53 triggers repair mechanisms. If repairs are unsuccessful, p53 signals apoptosis. A cell with an abnormal p53 protein cannot repair damaged DNA and thus cannot signa...
medmcqa
medmcqa_05_03562
Most common cause of death in primary amyloidosis is?
[ "Respiratory failure", "Cardiac failure", "Renal failure", "Septicemia" ]
B
ANSWER: (B) Cardiac failureREF: Harrison's Internal Medicine 17th edition chapter 324. AmyloidosisThe kidneys are the most frequently affected organ (80%), Renal amyloidosis is usually manifested by proteinuria, which is often in the nephrotic range and associated with significant hypoalbuminemia and edema or anasarca;...
sciq
sciq_01_08351
What is the disease where some alveoli of the lungs fill with fluid?
[ "pneumonia", "leukemia", "lung cancer", "lyme disease" ]
A
Pneumonia is a disease in which some of the alveoli of the lungs fill with fluid so gas exchange cannot occur. Symptoms usually include coughing, chest pain, and difficulty breathing. Pneumonia may be caused by an infection or injury of the lungs.
sciq
sciq_01_02540
What might a scientist do to confirm the work of another?
[ "question their methods", "develop a completely different experiment", "replicate their work", "study their work" ]
C
Scientists may work together on a project. One reason is that they can share equipment and personnel. Another reason is that they can share ideas. Scientists may also work separately. Even then, they use each other's data and interpretations. When one scientist publishes a paper, others will replicate the work to make ...
math_qa
mathqa_03_02318
the average age of students of a class is 15.8 years . the average age of boys in the class is 16.4 years and that of the girls is 15.4 years . the ration of the number of boys to the number of girls in the class is ?
[ "2 : 7", "2 : 3", "2 : 1", "2 : 9" ]
B
"let the ratio be k : 1 . then , k * 16.4 + 1 * 15.4 = ( k + 1 ) * 15.8 = ( 16.4 - 15.8 ) k = ( 15.8 - 15.4 ) = k = 0.4 / 0.6 = 2 / 3 required ratio = 2 / 3 : 1 = 2 : 3 . answer : option b explanation : let the ratio be k : 1 . then , k * 16.4 + 1 * 15.4 = ( k + 1 ) * 15.8 = ( 16.4 - 15.8 ) k = ( 15.8 - 15.4 ) = k = 0....
sciq
sciq_01_03289
Gases on earth originated from comets and what events?
[ "supernovas", "black holes", "volcanic eruptions", "tides" ]
C
The earliest Earth did not have an atmosphere or free water. The planet was far too hot for gases and water to collect. The atmosphere and oceans that we see today evolved over time. The gases came from volcanic eruptions and from comets.
medmcqa
medmcqa_05_01157
Which of the following features cannot be used to differentiate between Hodgkin's and Non Hodgkin's Lymphoma ?
[ "Extranodal involvement", "Spread contiguity", "Painless lymphadenopathy", "Localisation to a particular group of lymph nodes" ]
C
Hodgkin lymphoma, like NHL, usually manifests as painless lymphadenopathy.  Although a definitive distinction from NHL can be made only by examination of a tissue biopsy,  several clinical features favor the diagnosis of Hodgkin lymphoma. After the diagnosis is established, staging is used to guide therapy and determin...
medmcqa
medmcqa_05_03453
The enzyme deficient in Von-Gierke&;s disease is
[ "Glucose-6-phosphatase", "Acid maltase", "Muscle phosphorylase", "Liver phosphorylase" ]
A
Repeated question
sciq
sciq_01_08759
Compared to free-floating bacteria, bacteria in biofilms often show increased resistance to what?
[ "acid and antibiotics", "antibiotics and detergents", "alcohol and detergents", "acid and detergents" ]
B
Compared to free-floating bacteria, bacteria in biofilms often show increased resistance to antibiotics and detergents. Why do you think this might be the case?.
ARC-Challenge
arc_04_02166
Michael learned that the movement of Earth in the solar system causes changes that can be seen on the planet. Which change could be seen on Earth in the time it takes Earth to rotate once on its axis?
[ "day becoming night", "winter changing to spring", "January changing to February", "a new moon becoming a full moon" ]
A
null
openbookqa
obqa_02_03410
An example of a fossil is a paw print in what?
[ "water", "sky", "air", "hard stones" ]
D
An example of a fossil is a paw print in rock
openbookqa
obqa_02_00908
A refrigerator
[ "requires an electrical outlet to work", "requires an ice maker to work", "requires AA batteries to work", "requires a crisper to work" ]
A
electric devices require electrical energy to function
sciq
sciq_01_03686
Why are two different minerals considered different though they have the same chemical composition?
[ "different molecular structures", "different rods structures", "different crystal structures", "different linear structures" ]
C
Sometimes two different minerals have the same chemical composition. But they are different minerals because they have different crystal structures. Diamonds are very valuable as gemstones because they are very pretty and very hard. Graphite is the “lead” in pencils. It's not hard at all! Amazingly, both are made just ...
math_qa
mathqa_03_04546
a pupil ' s marks were wrongly entered as 73 instead of 45 . due to that the average marks for the class got increased by half . the number of pupils in the class is :
[ "56", "80", "20", "25" ]
A
"let there be x pupils in the class . total increase in marks = ( x * 1 / 2 ) = x / 2 . x / 2 = ( 73 - 45 ) = > x / 2 = 28 = > x = 56 . answer : a"
openbookqa
obqa_02_00811
Algae perform photosynthesis and so they are like to be found where in a body of water?
[ "nowhere", "bottom", "top", "middle" ]
C
algae is found in bodies of water
ARC-Easy
arc_04_00314
Where is most of the mass of the atom located?
[ "in the protons", "in the nucleus", "in the neutrons", "in the electrons" ]
B
null
medmcqa
medmcqa_05_03473
Feature of Torsade de pointes is:
[ "Wide QRS complex", "Sho QRS complex", "Sho QRS complex", "Sho QTc interval" ]
C
Answer is C (Prolonged QTc interval) `The ECG hallmark of torsades depoint's is marked QT prolongation'. `Torsades de pointes' or 'twisting of the points' is a specific type of ventricular tachycardia Characteristics of Torsades de pointes Polymorphic QRS complexes that change in amplitude Cycle length giving the appea...
openbookqa
obqa_02_00911
A pet with flippers is sometimes kept in a
[ "folding metal crate with door", "cushioned pad with round opening", "bean-shaped container with fake tree", "cage with wheel and tubes" ]
C
flippers are used for moving in water
openbookqa
obqa_02_03884
Salt was at one time
[ "currency", "unrealistic", "imaginary", "a feeling" ]
A
adding salt to a solid decreases the freezing point of that solid
math_qa
mathqa_03_02739
a train leaves mumabai at 9 am at a speed of 45 kmph . after one hour , another train leaves mumbai in the same direction as that of the first train at a speed of 90 kmph . when and at what distance from mumbai do the two trains meet ?
[ "287", "279", "90", "278" ]
C
"when the second train leaves mumbai the first train covers 45 * 1 = 45 km so , the distance between first train and second train is 45 km at 10.00 am time taken by the trains to meet = distance / relative speed = 45 / ( 90 - 45 ) = 1 hours so , the two trains meet at 2 p . m . the two trains meet 1 * 90 = 90 km away f...
sciq
sciq_01_05218
Many deleterious alleles have such severe effects that a homozygous embryo spontaneously aborts long before what?
[ "baby", "couple", "birth", "LIfe" ]
C
openbookqa
obqa_02_04705
Which is likeliest to make noises from its mouth?
[ "a fish", "a truck", "a chicken", "an ant" ]
C
chickens cluck
ARC-Challenge
arc_04_02399
A turtle eating worms is an example of
[ "breathing", "reproducing", "eliminating waste", "taking in nutrients" ]
D
null
math_qa
mathqa_03_01454
p and q invested in a business . the profit earned was divided in the ratio 3 : 5 . if p invested rs 12000 , the amount invested by q is
[ "30000", "50000", "40000", "20000" ]
A
"let the amount invested by q = q 12000 : q = 3 : 5 ⇒ 12000 × 5 = 3 q ⇒ q = ( 12000 × 5 ) / 3 = 30000 answer is a"
medmcqa
medmcqa_05_00105
Positive feedback action of estrogen for inducing luteininzing hormone surge is associated with which of the following steroid hormone ratios in peripheral circulation:
[ "High estrogen : low progesterone", "Low esterogen : high progesterone", "Low esterogen : low progesterone", "High esterogen : high progesterone" ]
A
A i.e. High estrogen, low progesteroneL H surge causes ovulationQ. For ovulation to occur the hormone picture should be high estrogen & low progesteronQEstrogenAt the time of ovulation, ova in the Graffian follicle needs to be well developed, which is accomplished by ' high estrogenQLH secretion is held in check by neg...
medmcqa
medmcqa_05_04876
If there are 4 nucleotides instead of 3 in codon, how many amino acids may be formed ?
[ "16", "21", "256", "64" ]
C
Formula for calculating no. of codons = (4)n n = no. of nucleotides that constitute codon. e.g. if n = 2; no. of codons = (4)2 = 16 if n = 3; no. of codons = (4)3 = 64 if n = 4; no. of codons = (4)4 = 256 so on