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math_qa
mathqa_03_02537
it is currently 8 : 34 pm . at what time in the morning was it exactly 39,668 minutes ago ?
[ "7 : 22", "7 : 24", "7 : 26", "7 : 28" ]
C
divide 39,668 by 60 to convert to minutes : 39,668 / 60 = 661 r 8 . that is 661 hours , 8 minutes . all of the answer choices are during the same hour before : 34 , so we can assume the 661 hours takes the time back into the 7 am hour to 7 : 34 am . going back 8 more minutes yields the time 7 : 26 am . c
ARC-Easy
arc_04_01346
DNA molecules contain the genetic information that determines the characteristics of a living organism. How do DNA molecules express the genetic information they contain?
[ "by breaking down proteins within the cell", "by directing the process of protein synthesis", "by regulating the storage of cellular proteins", "by controlling the movement of protein molecules" ]
B
null
sciq
sciq_01_09298
Cardiomyocytes are striated muscle cells found where?
[ "in the intestines", "in cardiac tissue", "in lung tissue", "in the diaphram" ]
B
Figure 40.13 Cardiomyocytes are striated muscle cells found in cardiac tissue. (credit: modification of work by Dr. Girod, Anton Becker; scale-bar data from Matt Russell).
openbookqa
obqa_02_00952
Some bacteria are beneficial and some bacteria
[ "cause droughts", "cause thriving populations", "cause rosacea", "cause upset stomach" ]
D
bacteria cause food poisoning
sciq
sciq_01_07463
Eight of the hottest years on record have occurred since what year?
[ "2002", "1998", "1991", "1997" ]
B
Since the mid 1800s, Earth has warmed up quickly. Look at Figure below . The 14 hottest years on record have all occurred since 1900. Eight of them have occurred since 1998! This is what is usually meant by global warming .
math_qa
mathqa_03_03072
a jogger is running at 9 kmph alongside a railway track in 240 meters ahead of the engine of a 120 meters long train . the train is running at 45 kmph in the same direction . how much time does it take for the train to pass the jogger ?
[ "46", "36", "18", "22" ]
B
explanation : distance to be covered = 240 + 120 = 360 m relative speed = 36 km / hr = 36 × 10 / 36 = 10 m / s time = distance / speed = 360 / 10 = 36 seconds answer : option b
math_qa
mathqa_03_02696
if 3 women can color 180 m long cloth in 2 days , then 5 women can color 300 m long cloth in ?
[ "2 days", "3 days", "5 days", "1 day" ]
A
"the length of cloth painted by one woman in one day = 180 / 3 × 2 = 30 m no . of days required to paint 300 m cloth by 5 women = 300 / 5 × 30 = 2 days answer : a"
sciq
sciq_01_10245
Photographs of the heat emitted by an object are called what?
[ "cosmic images", "radio images", "thermal images", "variable images" ]
C
openbookqa
obqa_02_01402
Shortly after the moon is in ecliptical longitude with the Sun, one will see
[ "a waning crescent", "a waxing crescent", "a waning gibbous", "a waxing gibbous" ]
B
the first quarter phase of the moon occurs after the new moon
medmcqa
medmcqa_05_04507
A female presented with a severe headache of sudden onset. On CT scan a diagnosis of subarachnoid hemorrhage is made. The most common cause of subarachnoid hemorrhage is :
[ "Middle meningeal artery", "Berry aneurysm rupture", "Basilar artery", "Subdural venous sinuses" ]
B
Ans. is 'b' ie. Berry Aneurysm (Ref. : Harrison, 17/e pl726 (16/e, p 2387, 15/e, p 238))" Excluding head trauma the most common cause of SAH is rupture of a saccular aneurysma (Berry aneurysm or congenital aneurysm). "Berry aneurysms - also k/a as congenital aneurysm although they are not present at birth. There is how...
sciq
sciq_01_09013
By what processes does the ocean modify landforms?
[ "splash and deposition", "erosion and deposition", "shape and deposition", "sweeping and deposition" ]
B
The power of the ocean modifies landforms by erosion and deposition. Landforms modified by both erosion and deposition are seen in this photo. The cliff is being eroded by incoming waves. The beach is being created as sand is being deposited.
math_qa
mathqa_03_00904
the sum of the first 50 positive even integers is 2550 . what is the sum of the even integers from 302 to 400 inclusive ?
[ "11,550", "14,550", "17,550", "20,550" ]
C
"2 + 4 + 6 + 8 + . . . + 100 = 2550 302 + 304 + . . . + 400 = 50 ( 300 ) + ( 2 + 4 + . . . + 100 ) = 15,000 + 2550 = 17,550 the answer is c ."
sciq
sciq_01_01278
The length that an object has travelled in one or multiple directions can also be called what?
[ "axis", "velocity", "distance", "range" ]
C
The length traveled by an object moving in any direction or even changing direction is called distance.
openbookqa
obqa_02_00361
air masses are pushed by westerlies but stopped by
[ "gravity", "meandering air currents", "currents", "sunlight" ]
B
jet streams may deflect the air masses moved by the prevailing westerlies
openbookqa
obqa_02_02898
the availability of soil nutrients in the food chain can be explained by which of these?
[ "the soil emanates nutrients into the air", "the primary producers depend on the soil", "all living things eat sand", "the water we drink is from the soil" ]
B
if some nutrients are in the soil then those nutrients are in the food chain
sciq
sciq_01_03770
Transforming from a caterpillar to a butterfly requires a lot of what?
[ "food", "fuel", "Water", "energy" ]
D
This caterpillar is busily munching its way through leaf after leaf. In fact, caterpillars do little more than eat, day and night. Like all living things, they need food to provide their cells with energy. The caterpillar will soon go through an amazing transformation to become a beautiful butterfly. These changes requ...
sciq
sciq_01_03173
What kind of reproduction results in offspring that are genetically unique?
[ "budding", "sexual reproduction", "asexual reproduction", "fragmentation" ]
B
Sexual reproduction results in infinite possibilities of genetic variation. In other words, sexual reproduction results in offspring that are genetically unique. They differ from both parents and also from each other. This occurs for a number of reasons.
openbookqa
obqa_02_01128
An animal that may like a banana peel is a
[ "bear", "raccoon", "cat", "dog" ]
B
raccoons eat waste
sciq
sciq_01_06706
What term describes waves that travel through matter?
[ "heat waves", "water waves", "replaced waves", "mechanical waves" ]
D
Waves that travel through matter—such as the fabric of a flag—are called mechanical waves. The matter they travel through is called the medium. When the energy of a wave passes through the medium, particles of the medium move. The more energy the wave has, the farther the particles of the medium move. The distance the ...
sciq
sciq_01_03843
What type of digestion is chewing an example of?
[ "mechanical", "fluid", "gravity", "electromagnetic" ]
A
openbookqa
obqa_02_04157
Thermal conduction is when materials conduct what through those materials?
[ "air", "hotness", "electricity", "cold" ]
B
thermal conduction is when materials conduct heat through those materials
math_qa
mathqa_03_02098
the present ratio of students to teachers at a certain school is 45 to 1 . if the student enrollment were to increase by 50 students and the number of teachers were to increase by 5 , the ratio of students to teachers would then be 25 to 1 . what is the present number of teachers ?
[ "4", "8", "10", "12" ]
A
"we are given that the ratio of students to teacher is 45 to 1 . we can rewrite this using variable multipliers . students : teachers = 45 x : x we are next given that student enrollment increases by 50 and the number of teachers increases by 5 . with this change the new ratio becomes 25 to 1 . we can put all this into...
sciq
sciq_01_07331
In the periodic table, elements are arranged from left to right according to what property?
[ "metallic mass", "major mass", "real mass", "atomic mass" ]
D
You can see how Mendeleev organized the elements in Figure below . From left to right across each row, elements are arranged by increasing atomic mass. Mendeleev discovered that if he placed eight elements in each row and then continued on to the next row, the columns of the table would contain elements with similar pr...
sciq
sciq_01_02478
What serves to replace nonreproducing specialized cells as needed in the adult body?
[ "dendritic cells", "stem cells", "monocyte cells", "osteoclast cells" ]
B
medmcqa
medmcqa_05_00216
Which of the following is considered as an anxiolytic substance?
[ "Caffeine", "Cholecystokinin", "Neuropeptide Y", "Carbondioxide" ]
C
Anxiolytic substances Anxiogenic substances Benzodiazepines Selective Serotonin Reuptake Inhibitors Beta-blockers Neuropeptide Y Buspirone Carbon dioxide Cholecystokinin Flumazenil Caffeine
math_qa
mathqa_03_04737
in the xy - plane , the point ( 1 , 3 ) is the center of a circle . the point ( - 2 , 3 ) lies inside the circle and the point ( 1 , - 2 ) lies outside the circle . if the radius r of the circle is an integer , then r =
[ "6", "5", "4", "3" ]
C
"an easy way to solve this question will be just to mark the points on the coordinate plane . you ' ll see that the distance between the center ( 1 , 3 ) and the point inside the circle ( - 2 , 3 ) is 3 units ( both points are on y = 3 line so the distance will simply be 1 - ( - 2 ) = 3 ) so the radius must be more tha...
medmcqa
medmcqa_05_01437
HLA is present on –
[ "Short arm of chromosomes 6", "Short term of chromosomes 3", "Long arm of chromosomes 3", "Long arm of chromosomes 6" ]
A
o HLA complex (MHC) gene is located on the short arm of chromosome 6. o The histocompatibility antigens (human leukocyte antigens - HLA) are cell surface antigens that induce an immune response leading to the rejection of allografts. o The principal physiologic function of the cell surface histocompatibility molecules ...
openbookqa
obqa_02_00038
What is the most likely to be an effect of acid rain on an aquatic environment?
[ "decrease in plant life", "increase in fish population", "increase in plant growth", "cleaner and clearer water" ]
A
acid rain has a negative impact on water quality
sciq
sciq_01_05006
What do male cones in seed plants contain?
[ "nitrogen", "spores", "pollen", "nutrients" ]
C
sciq
sciq_01_03631
How many pairs of chromosomes do human have ?
[ "31 pairs", "12 pairs", "23 pairs", "19 pairs" ]
C
Human Genome, Chromosomes, and Genes. Each chromosome of the human genome contains many genes as well as noncoding intergenic (between genes) regions. Each pair of chromosomes is shown here in a different color. Notice that there are 23 pairs of chromosomes.
sciq
sciq_01_08918
What 3 types of friction occur between solid surfaces?
[ "static , ascending , rolling", "static , arching , rolling", "static,desending,sliding", "static, sliding, rolling" ]
D
Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and gases. All four types of friction are described bel...
medmcqa
medmcqa_05_02399
22-year-old man has a gonorrheal infection that has infiltrated the space between inferior fascia of the urogenital diaphragm and superficial perineal fascia. Which of the following structures might be inflamed?
[ "Membranous pa of the male urethra", "Bulbourethral gland", "Greater vestibular gland", "Deep transverse perineal muscle" ]
C
*Greater vestibular gland is in the superficial perineal space between inferior fascia of urogenital diaphragm and membranous layer of superficial perineal fascia (Colles' fascia). All the other structures are found in the deep perineal pouch.
sciq
sciq_01_06207
The smallest units of matter that retain the unique properties of an element are known as what?
[ "molecules", "neutrons", "protons", "atoms" ]
D
All matter is made of tiny particles. Protons, neutrons, and electrons form atoms that bond together to create molecules. Atoms are the smallest units that have the properties of an element. Molecules are the smallest units of a compound. Chemical bonds hold molecules together. Molecules form the different types of min...
medmcqa
medmcqa_05_02643
Commonest cause of obstructive hydrocephalus in children -
[ "Acqueductal stenosis", "Aqueductal gliosis", "Subarachnoid hemorrhage", "Tubercular meningitis" ]
A
Ans. is 'a' i.e., Acqueductal stenosis
ARC-Challenge
arc_04_03189
Scientists study fossils to learn about
[ "the composition of the Earth.", "patterns of crystal formation.", "physical properties of rocks.", "organisms from long ago." ]
D
null
medmcqa
medmcqa_05_01570
A patient has a painful ulcer on the tip of his tongue. Which of the following cranial nerves carries the pain sensation he experiences?
[ "XII", "V", "VII", "IX" ]
B
The innervation of the tongue is complex. The mandibular division of the trigeminal nerve (V3) carries general somatic sensation from the anterior two-thirds of the tongue. The maxillary division carries somatic sensation from the palate, upper gums, and upper lip. The facial nerve carries taste from the anterior two-t...
math_qa
mathqa_03_02410
two persons a and b can complete a piece of work in 30 days and 45 days respectively . if they work together , what part of the work will be completed in 5 days ?
[ "5 / 18", "1 / 6", "1 / 4", "1 / 9" ]
A
"a ' s one day ' s work = 1 / 30 b ' s one day ' s work = 1 / 45 ( a + b ) ' s one day ' s work = 1 / 30 + 1 / 45 = 1 / 18 the part of the work completed in 5 days = 5 ( 1 / 18 ) = 5 / 18 . answer a"
math_qa
mathqa_03_01057
if two positive numbers are in the ratio 1 / 7 : 1 / 5 , then by what percent is the second number more than the first ?
[ "70 %", "90 %", "60 %", "40 %" ]
D
"given ratio = 1 / 7 : 1 / 5 = 5 : 7 let first number be 5 x and the second number be 7 x . the second number is more than first number by 2 x . required percentage = 2 x / 5 x * 100 = 40 % . answer : d"
medmcqa
medmcqa_05_04913
Sterilization and disinfection of blood spills is done by:
[ "Formaldehyde", "Sodium hypochlorite", "Tincture iodin", "Phenols" ]
B
ANSWER: (B) Sodium hypochloriteREF: Park 20th ed p. 118, Ananthnarayan 8th e p. 35Halogens (hypochlorides)Cheap, effective and act by release of free chlorine and effective against viruses.Chlorine-releasing agents are chemicals disinfectants which are effective against blood-borne viruses and are rapid in action.They ...
math_qa
mathqa_03_01185
for the past n days , the average ( arithmetic mean ) daily production at a company was 50 units . if today ' s production of 90 units raises the average to 52 units per day , what is the value of n ?
[ "30", "19", "10", "9" ]
B
"( average production for n days ) * n = ( total production for n days ) - - > 50 n = ( total production for n days ) ; ( total production for n days ) + 90 = ( average production for n + 1 days ) * ( n + 1 ) - - > 50 n + 90 = 52 * ( n + 1 ) - - > n = 19 . or as 40 extra units increased the average for n + 1 days by 2 ...
sciq
sciq_01_10736
Exemplified by cesium, which ignites spontaneously in air, pure elements with a high metallic character tend to be very what?
[ "radiactive", "inactive", "reactive", "proactive" ]
C
Pure elements with a high metallic character, meaning those that have chemical properties most similar to properties of metals, are generally very reactive. Metals tend to lose electrons in chemical reactions, as indicated by their low ionization energies. Within a compound, metal atoms have a relatively low attraction...
math_qa
mathqa_03_03134
34 : 43 : : 25 : ?
[ "49", "52", "36", "64" ]
B
"ans 52 reverse of 25 answer : b"
sciq
sciq_01_04191
The pine tree is the sporophyte; its sporangia are located on scalelike structures packed densely where?
[ "in cones", "in the limb tips", "in the bark", "in the needles" ]
A
sciq
sciq_01_04289
What gases move in and out of blood during gas exchange?
[ "oxygen, nitrogen", "oxygen, carbon monoxide", "nitrogen, carbon dioxide", "oxygen, carbon dioxide" ]
D
User:helix84/Wikimedia Commons. Gas exchange is the movement of oxygen into the blood and carbon dioxide out of the blood . CC BY 2.5.
math_qa
mathqa_03_00470
9.8 , 9.8 , 9.9 , 9.9 , 10.0 , 10.0 , 10.1 , 10.5 the mean and the standard deviation of the 8 numbers shown above is 10 and 0.212 respectively . what percent of the 8 numbers are within 1 standard deviation of the mean ?
[ "90.5 %", "87.5 %", "80.5 %", "77.5 %" ]
B
within 1 standard deviation of the mean - means in the range { mean - 1 * sd ; mean + 1 * sd } = { 10 - 1 * 0.212 ; 10 + 0.3 } = { 9.788 ; 10.212 } . from the 8 listed numbers , 7 are within this range so 6 / 8 = 87.5 % . answer : b .
sciq
sciq_01_04758
Norovirus causes the inflammation of the stomach and what else?
[ "muscles", "lungs", "intestines", "liver" ]
C
Common foodborne viruses include norovirus and hepatitis A virus. Norovirus, which causes inflammation of the stomach and intestines, has been a recent issue on cruise ships, infecting hundreds of passengers and crew on certain voyages. Hepatitis A causes inflammation of the liver, which is treated with rest and diet c...
openbookqa
obqa_02_02920
Which of these helps some animals find mates by color?
[ "hearing", "smell", "eyesight", "nose" ]
C
coloration is used to find a mate by some animals
medmcqa
medmcqa_05_01953
Endemic disease is defined as -
[ "Disease occuring regularly in expected frequency", "Disease occuring irregularly", "Disease occuring in excess of expected freqency", "Disease affecting a large population" ]
A
Ans. is 'a' i.e., Disease occuring regularly in expected frequency Sporadic - Disease occuring irregularly from time to time.Endemic - Disease occuring regularly in expected frequency.Epidemic - Disease occuring in excess of expected frequency.Pandemic - Epidemic affecting a large proportion of population over a wide g...
ARC-Easy
arc_04_00944
Which of these is a function of a leaf?
[ "Carrying nutrients throughout the plant", "Converting solar energy into sugar", "Creating shade for the plant", "Absorbing water from the ground" ]
B
null
math_qa
mathqa_03_01968
in may , the groundskeeper at spring lake golf club built a circular green with an area of 70 π square feet . in august , the groundskeeper doubled the distance from the center of the green to the edge of the green . what is the total area of the renovated green ?
[ "1000 π", "400 π", "280 π", "200 π" ]
C
"area = π r ^ 2 , so doubling the radius results in an area that is 4 times the original area . 4 ( 70 π ) = 280 π the answer is c ."
math_qa
mathqa_03_01562
the area of a square is equal to three times the area of a rectangle of dimensions 25 cm * 27 cm . what is the perimeter of the square ?
[ "180 cm", "190 cm", "170 cm", "150 cm" ]
A
"area of the square = s * s = 3 ( 25 * 27 ) = > s = 3 * 5 * 3 = 45 cm perimeter of the square = 4 * 45 = 180 cm . answer : a"
sciq
sciq_01_07932
How many types of leptons are there?
[ "nine", "two", "twelve", "six" ]
D
There are also six types of leptons, including electrons. Leptons have an electric charge of either -1 or 0. Electrons, for example, have a charge of -1. Leptons have mass, although the mass of electrons is extremely small.
medmcqa
medmcqa_05_02279
Most cardiotoxic local anesthetic
[ "Procaine", "Bupivacaine", "Cocaine", "Lidocaine" ]
B
Bupivacaine is the most cardiotoxic LA (Ropivacaine is a newer bupivacaine congenial with less cardiotoxicity).(Refer: stoelting's pharmacology and physiology in anaesthetic practice, 5th edition, pg no.294)
medmcqa
medmcqa_05_02112
Which of the following is the first to improve after surgery for GH producing adenoma?
[ "Impaired glucose tolerance", "Hypeension", "Cardiomegaly", "Soft tissue swelling" ]
D
Trans-sphenoidal surgery is the preferred primary treatment for management of micro and macro-adenomas leading to acromegaly. The first symptom to improve is Soft tissue Swelling. Soft tissue swelling manifests as increased Heel pad thickness, increased shoe and glove size, ring tightening, coarse facies and large fles...
sciq
sciq_01_05791
Pacemaker cells stimulate the spontaneous contraction of cardiac muscle as a functional unit, called a what?
[ "adipocytes", "tapetum", "syncytium", "coenocyte" ]
C
10.7 Cardiac Muscle Tissue Cardiac muscle is striated muscle that is present only in the heart. Cardiac muscle fibers have a single nucleus, are branched, and joined to one another by intercalated discs that contain gap junctions for depolarization between cells and desmosomes to hold the fibers together when the heart...
math_qa
mathqa_03_01132
two trains of equal length , running with the speeds of 60 and 20 kmph , take 50 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 ?
[ "12.5", "8.01", "7.5", "26" ]
A
"rs = 60 - 40 = 20 * 5 / 18 = 100 / 18 t = 50 d = 50 * 100 / 18 = 2500 / 9 rs = 60 + 20 = 80 * 5 / 18 t = 2500 / 9 * 18 / 400 = 12.5 sec . answer : a"
sciq
sciq_01_01162
What piece of technology can you use to see infrared light?
[ "light meters", "telescope", "microscope", "night goggles" ]
D
The human body radiates heat in the range of infrared light. Night goggles work by ‘seeing’ the infrared light emitted by our bodies.
ARC-Easy
arc_04_00369
A car runs out of fuel while traveling on a level road and eventually comes to a stop. Which of the following best explains why the car stops?
[ "Some of the energy of the car was lost to friction.", "Some of the energy of the car was destroyed.", "The amount of kinetic energy increased.", "The amount of useful energy increased." ]
A
null
math_qa
mathqa_03_01001
thomas and matt has some money with them in the ratio of 3 : 4 . if their father gives rs . 30 to each of them then the ratio becomes 4 : 5 . what would be the ratio if thomas spend rs . 40 and matt spend rs . 20 from what they have now ?
[ "1 : 2", "2 : 3", "3 : 4", "4 : 5" ]
A
let money of thomas and matt be x and y respectively . x / y = 3 / 4 = > x = 3 / 4 y ( x + 30 ) / ( y + 30 ) = 4 / 5 = > 5 x + 150 = 4 y + 120 = > 5 x = 4 y - 30 but x = 3 / 4 y 5 * 3 / 4 y = 4 y - 30 15 y = 16 y - 120 = > y = 120 = > x = 3 * 120 / 4 = > x = 90 ratio of their money , if thomas spend rs . 40 and matt sp...
medmcqa
medmcqa_05_00571
Bed of tonsil is formed by-
[ "Superior constrictor", "Middle constrictor", "Inferior constrictor", "Platysma" ]
A
Ans. A. Superior constrictorThe tonsillar bed-a. The lateral or deep surface of the tonsil spreads downwards, upwards and forwards.b. Inferiorly, it invades the dorsum of the tongue, superiorly, the soft palate, and, anteriorly, it may extend for some distance under the palatoglossal arch.c. This deep, lateral aspect i...
sciq
sciq_01_00905
Slime molds are fungus-like protists that grow as slimy masses on what?
[ "decaying matter", "recycled matter", "food matter", "dark matter" ]
A
Slime molds are fungus-like protists that grow as slimy masses on decaying matter. They are commonly found on items such as rotting logs.
sciq
sciq_01_00777
What is the process in which a liquid changes to a solid?
[ "freezing", "boiling", "condensation", "melting" ]
A
Freezing is the process in which a liquid changes to a solid. It occurs when a liquid cools to a point at which its particles no longer have enough energy to overcome the force of attraction between them.
ARC-Challenge
arc_04_03184
Which most likely contributes to the rotational pattern of a hurricane that develops in the Atlantic Ocean?
[ "Gulf Stream", "Coriolis effect", "low relative humidity", "high-pressure systems" ]
B
null
openbookqa
obqa_02_01108
speed is a measure of how fast all these move but
[ "a person waiting", "a fish swimming", "a dog running", "a bird flying" ]
A
speed is a measure of how fast an object is moving
ARC-Easy
arc_04_01495
Near Earth's equator, water generally exists naturally in the liquid and gas states. In which other part of Earth is water usually found naturally in only two states?
[ "Indian Ocean", "interior of Africa", "South Pole", "Tropic of Cancer" ]
C
null
sciq
sciq_01_10864
When a wave travels down a string, the string vibrates up and down at right angles to the wave's what?
[ "pressure", "frequency", "direction", "gravity" ]
C
A: The wave travels down the string to the end. The string vibrates up and down at right angles to the direction of the wave.
medmcqa
medmcqa_05_03968
Wegener's granulomatosis does not affect:
[ "Kidney", "Lungs", "Eye", "Liver" ]
D
Answer is D (Liver) Granulomatous vasculitis involving the Liver is rare in Wegener's granulomatosis. Wegener's granulomotosis does not typically involve the liver. Liver function tests may be observed to be abnormal in Wegener's granulomatosis. These most commonly reflect inflammation rather than specific liver involv...
sciq
sciq_01_09541
What are the main organs for breathing in a mammal?
[ "nostrils", "lungs", "intestines", "gills" ]
B
All mammals have lungs that are the main organs for breathing. Lung capacity has evolved to support the animal’s activities. During inhalation, the lungs expand with air, and oxygen diffuses across the lung’s surface and enters the bloodstream. During exhalation, the lungs expel air and lung volume decreases. In the ne...
medmcqa
medmcqa_05_04219
Acute mastitis commonly occurs during?
[ "Pregnancy", "Pubey", "Lactation", "Infancy" ]
C
Ans. is 'c' i.e. Lactation
ARC-Easy
arc_04_01243
Scientists are discovering ways to make some crops use less water. A person working in which job would most benefit from this research?
[ "a farmer", "a doctor", "a waiter", "a cook" ]
A
null
math_qa
mathqa_03_01484
the cost of 10 kg of mangos is equal to the cost of 24 kg of rice . the cost of 6 kg of flour equals the cost of 2 kg of rice . the cost of each kg of flour is $ 23 . find the total cost of 4 kg of mangos , 3 kg of rice and 5 kg of flour ?
[ "347.4", "984.4", "877.4", "637.4" ]
B
let the costs of each kg of mangos and each kg of rice be $ a and $ r respectively . 10 a = 24 r and 6 * 23 = 2 r a = 12 / 5 r and r = 69 a = 165.6 required total cost = 4 * 165.6 + 3 * 69 + 5 * 23 = 662.4 + 207 + 115 = $ 984.40 b
sciq
sciq_01_01028
What do fungi absorb to get their nutrition?
[ "soil", "air", "water", "organic compounds from other organisms" ]
D
Most fungi grow on moist soil or rotting vegetation such as dead logs. Some fungi live in water. Others live in or on other organisms. Fungi get their nutrition by absorbing organic compounds from other organisms. The other organisms may be dead or alive, depending on the fungus.
sciq
sciq_01_02167
Each vertebral body has a large hole in the center through which the nerves of what pass?
[ "layers cord", "spinal cord", "steering cord", "Brain Cord" ]
B
Each vertebral body has a large hole in the center through which the nerves of the spinal cord pass. There is also a notch on each side through which the spinal nerves, which serve the body at that level, can exit from the spinal cord. The vertebral column is approximately 71 cm (28 inches) in adult male humans and is ...
medmcqa
medmcqa_05_02461
What lies between cystic duct and common hepatic duct?
[ "Lymph node", "Poal pein", "Hepatic aery", "Cystic aery" ]
A
The common hepatic duct is the duct formed by the convergence of the right hepatic duct (which drains bile from the right functional lobe of the liver) and the left hepatic duct (which drains bile from the left functional lobe of the liver). The common hepatic duct then joins the cystic duct coming from the gallbladder...
openbookqa
obqa_02_00574
Decomposition is important for
[ "water", "medicine", "sunlight", "food" ]
D
decomposition is when a decomposer breaks down dead organisms
openbookqa
obqa_02_04065
What requires nutrients for survival?
[ "sand", "plastic", "metal", "an anaconda" ]
D
an animal requires nutrients for survival
sciq
sciq_01_09678
Parasites usually harm their hosts (or they wouldn't be parasites), but what do they usually stop short of doing?
[ "mutating their hosts", "killing their host", "benefiting their hosts", "reproducing with hosts" ]
B
Some parasites kill their host, but most do not. It’s easy to see why. If a parasite kills its host, the parasite may also die. Instead, parasites usually cause relatively minor damage to their host.
openbookqa
obqa_02_01098
Deep sea animals like giant squid live
[ "black inky ocean", "in water sources", "in liquid places", "bottom of rivers" ]
A
deep sea animals live deep in the ocean
sciq
sciq_01_11611
What is the upper-most atmosphere known as?
[ "xerosphere", "ionosphere", "exosphere", "thermosphere" ]
D
The atmosphere is a big part of the water cycle. What do you think would happen to Earth’s water without it?.
sciq
sciq_01_07265
Membranes will become increasingly what as temperatures rise?
[ "acidic", "metallic", "fluid", "toxic" ]
C
sciq
sciq_01_07219
Which mineral do native americans use to decorate items?
[ "turquoise", "Topaz", "Amethyst", "Tanzanite" ]
A
Some minerals are valuable simply because they are beautiful. Jade has been used for thousands of years in China. Native Americans have been decorating items with turquoise since ancient times. Minerals like jade, turquoise, diamonds, and emeralds are gemstones. A gemstone is a material that is cut and polished to use ...
sciq
sciq_01_11342
Hiv is a retrovirus, which means it reverse transcribes its rna genome into what?
[ "dna", "ribosomes", "amino acid chains", "atp" ]
A
Figure 17.5 Viruses can be complex in shape or relatively simple. This figure shows three relatively complex virions: the bacteriophage T4, with its DNA-containing head group and tail fibers that attach to host cells; adenovirus, which uses spikes from its capsid to bind to the host cells; and HIV, which uses glycoprot...
medmcqa
medmcqa_05_02900
A 5 year old male patient complains of swollen and painful gums. He gives a history of delayed eruption of teeth. On extra-oral examination, an underdeveloped midface and prognathic jaw relationship was seen. Intraoral finding revealed open bite, macroglossia and generalized periodontitis. Which of the following is the...
[ "Non disjunction during paternal meiosis", "Non disjunction during maternal meiosis", "Translocation", "Mosaicism" ]
B
Mosaicism is an abnormality defined as the presence of 2 or more cell lines in a single individual. Polyploidy is a common abnormality seen in 1st trimester pregnancy losses. Monosomies occur when only 1, instead of the normal 2, of a given chromosome is present in an otherwise diploid cell. In approximately 95% of the...
sciq
sciq_01_05774
A system of glands secretes what chemical messenger molecules into the blood?
[ "enzymes", "hormones", "metabolytes", "acids" ]
B
system of glands that secrete chemical messenger molecules called hormones into the blood.
sciq
sciq_01_05894
What kind of reaction adds water to an organic molecule and breaks the large molecule into smaller molecules?
[ "supplementation reaction", "aerobic reaction", "hydration reaction", "heat reaction" ]
C
A hydration reaction is the opposite of a dehydration reaction. A hydration reaction adds water to an organic molecule and breaks the large molecule into smaller molecules. Hydration reactions occur in an acidic water solution. An example of hydration reaction is the breaking of peptide bonds in polypeptides. A hydroxi...
medmcqa
medmcqa_05_01355
Death caused by medical negligence is under -
[ "304 IPC", "351 IPC", "312 IPC", "Indian counsels act" ]
A
1. Medical negligence act under IPC is Sec 304-A IPC. 2. Sec 304 A IPC pertains to “Causing death by negligence”. It Is punishable up to 2 years. It is applied, usually, in any case of death due to a rash and negligent act, e.g. death caused by rash driving. 3. Sec 351 IPC deals with “assault” that is a gesture inclu...
math_qa
mathqa_03_03931
at a certain organisation , the number of male members went up by 13 % in the year 2001 from year 2000 , and the number of females members went down by 6 % in the same time period . if the total membership at the organisation went up by 1.2 % from the year 2000 to 2001 , what was the ratio of male members to female mem...
[ "1 : 2", "1 : 3", "2 : 3", "3 : 5" ]
D
men increase by 13 % = = > 1.13 m = males in 2001 women decrease by 6 % = = > 0.94 f = women in 2001 total employees increase by 1.2 % = = > 1.012 * ( m + f ) = total number of employees in 2001 obviously ( males in 2001 ) + ( females in 2001 ) = total number of employees in 2001 1.13 m + 0.94 f = 1.012 * ( m + f ) 1.1...
sciq
sciq_01_07357
An experiment generates what to support a hypothesis?
[ "reason", "falsehoods", "evidence", "study" ]
C
A field goal kicker lines up to kick a 44 yard (40 m) field goal. He kicks it with an initial velocity of 22 m/s at an angle of . The field goal posts are 3 meters high. Does he make the field goal?.
sciq
sciq_01_05119
In response to high blood osmolarity, which can occur during dehydration or following a very salty meal, the osmoreceptors signal the posterior pituitary to release this?
[ "salt", "antidiuretic hormone (adh)", "adrenaline", "oxygen" ]
B
Antidiuretic Hormone (ADH) The solute concentration of the blood, or blood osmolarity, may change in response to the consumption of certain foods and fluids, as well as in response to disease, injury, medications, or other factors. Blood osmolarity is constantly monitored by osmoreceptors—specialized cells within the h...
medmcqa
medmcqa_05_03207
Organisms with characteristic "school of fish" appearance in stained smears is seen in:
[ "Granuloma inguinale", "Chancroid", "Lymphogranuloma venereum", "Herpes genitalis" ]
B
Haemophilus ducreyi produce "school of fish" appearance.
openbookqa
obqa_02_02304
What activity changes the local environment the most?
[ "people sometimes camping", "moderate rain", "over-logging", "rabbit breeding" ]
C
humans changing an environment sometimes causes that environment to be destroyed
medmcqa
medmcqa_05_04740
1st clinical sign of vitamin A deficiency is
[ "night blindness", "bitot's spots", "xerostomia", "conjunctival xerosis" ]
D
Night blindness (nyctalopia) is  one  of  the  earliest symptoms  of  vitamin  A  deficiency.
openbookqa
obqa_02_02607
What is most easily shown by a line graph?
[ "the quantity of carp in a pond", "the thoughts in a person's mind", "the amount of nothingness in the universe", "the number of gods in the universe" ]
A
a line graph is used for showing change over time
math_qa
mathqa_03_00517
the sum of the present ages of two persons a and b is 54 . if the age of a is twice that of b , find the sum of their ages 5 years hence ?
[ "50", "64", "70", "80" ]
B
"a + b = 54 , a = 2 b 2 b + b = 54 = > b = 18 then a = 36 . 5 years , their ages will be 41 and 23 . sum of their ages = 41 + 23 = 64 . answer : b"
sciq
sciq_01_08888
The number of waves that pass a fixed point in a given amount of time is called what?
[ "spread of a wave", "spectroscopy of a wave", "frequency of a wave", "wavelength of a wave" ]
C
A photon isn’t a fixed amount of energy. Instead, the amount of energy in a photon depends on the frequency of the electromagnetic wave. The frequency of a wave is the number of waves that pass a fixed point in a given amount of time, such as the number of waves per second. In waves with higher frequencies, photons hav...
ARC-Challenge
arc_04_02236
Data in tables may also be presented in graphs. Which type of data would best be displayed on a circle graph?
[ "the distance of the planets from the sun", "the depths of the major oceans on Earth", "the amount of rainfall each day for a month", "the percent of various materials in solid waste" ]
D
null
sciq
sciq_01_02431
What is an atom or group of bonded atoms that has a positive or negative charge?
[ "an photon", "a neutron", "an ion", "an electron" ]
C
An ion is an atom or group of bonded atoms that has a positive or negative charge. Ions are formed when an atom gains or loses electrons from its valence shell ( Figure below ). This process causes an imbalance between the number of positively charged protons and negatively charged electrons, so the overall ion will ca...
openbookqa
obqa_02_03277
Why does a turkey thermometer plunger cap come off?
[ "cold uranium ore", "expanding air", "expanding lead", "contracting gas" ]
B
if gas is heated then that gas will rise
openbookqa
obqa_02_03931
Which will take the longest to reach a boiling point
[ "tea kettle", "fish tank", "swimming pool", "bath tub" ]
C
boiling is when liquids are heated above their boiling point
medmcqa
medmcqa_05_00520
Which is not pyridoxine dependenta) Homocystinuria b) Maple syrup urine diseasec) Oxaluriad) Xanthinuria
[ "c", "bd", "ab", "ac" ]
B
Pyridoxal phosphate-dependent conditions are homocystinuria, cystathioninuria, oxaluria and xanthurenic aciduria. Don't get confused option d (xanthinuria) with xanthurenic aciduria. Both are different conditions In xanthurenic aciduria, there is excretion of xanthurenic acid (xanturenate), an alternative metabolite ...