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7.76k
sciq
sciq_01_02437
The human body regulates the use and storage of what simple sugar, a major cellular fuel?
[ "glucose", "secretion", "carbohydrate", "insulin" ]
A
math_qa
mathqa_03_04824
how long will a boy take to run round a square field of side 55 meters , if he runs at the rate of 9 km / hr ?
[ "88 sec", "45 sec", "1 min", "32 sec" ]
A
"speed = 9 km / hr = 9 * 5 / 18 = 5 / 2 m / sec distance = 55 * 4 = 220 m time taken = 220 * 2 / 5 = 88 sec answer is a"
ARC-Easy
arc_04_02058
What is the correct explanation for why we have day and night on Earth?
[ "The Sun orbits around the Earth.", "Earth orbits around the Sun.", "Earth turns on its axis.", "The Sun turns on its axis." ]
C
null
math_qa
mathqa_03_03716
3 friends a , b , c went for week end party to mcdonald ’ s restaurant and there they measure there weights in some order in 7 rounds . a , b , c , ab , bc , ac , abc . final round measure is 140 kg then find the average weight of all the 7 rounds ?
[ "98.5 kgs", "80 kgs", "76.5 kgs", "67.5 kgs" ]
B
"average weight = [ ( a + b + c + ( a + b ) + ( b + c ) + ( c + a ) + ( a + b + c ) ] / 7 = 4 ( a + b + c ) / 7 = 4 x 140 / 7 = 80 kgs answer : b"
sciq
sciq_01_02051
What is another term for stored energy?
[ "mechanical energy", "potential energy", "inertia", "latency" ]
B
Did you ever see a scene like the one in Figure below ? In many parts of the world, trees lose their leaves in autumn. The leaves turn color and then fall from the trees to the ground. As the leaves are falling, they have kinetic energy. While they are still attached to the trees they also have energy, but it’s not bec...
ARC-Easy
arc_04_01500
Some meteorologists use visual aids such as diagrams, maps, and charts when they present the weather to television viewers. How do different types of visual aids help the viewers understand complex weather phenomena?
[ "by combining knowledge from past reports with new information", "by providing information collected by other meteorologists", "by checking the accuracy of each part of the weather report", "by showing many components that impact the weather" ]
D
null
sciq
sciq_01_01066
What type of eukaryotes are protists normally?
[ "photosynthetic", "unicellular", "multicellular", "immature" ]
B
Most protists are so small that they can be seen only with a microscope. Protists are mostly unicellular (one-celled) eukaryotes. A few protists are multicellular (many-celled) and surprisingly large. For example, kelp is a multicellular protist that can grow to be over 100-meters long ( Figure below ). Multicellular p...
openbookqa
obqa_02_01102
As the wind is blowing on the back of a car with a strong gust, the car will
[ "rush forward faster than before", "wind is unable to affect car speed", "move forward instead of sideways", "maintain speed and direction" ]
A
as force exerted on an object increases , distance travelled will increase
medmcqa
medmcqa_05_04854
Renal GFR is best measured by –
[ "Tc 99 DMSA", "Tc 99 Pyrophosphate scan", "Tc 99 DTPA", "Creatinine clearance" ]
C
Inulin clearance is the gold standard for assessing GFR. It is the preferred measure of GFR when an accurate measure is critical. However, this method is not performed in clinical practice, because of technical complexity and limited availability. Next to inulin, radiocontrast agents (Tc - DTPA) are most accurate. Howe...
ARC-Challenge
arc_04_02149
Hatchling sea turtles are typically dark in color. Occasionally, a sea turtle hatches that is almost white in color. When crawling from the nest on the beach to the ocean, this light-colored sea turtle could be at risk for sunburn. The light color of the turtles would most likely
[ "help the turtles have better chances at reproducing.", "cause the shell of the sea turtles to become stronger.", "reduce the chances of turtles surviving to reproduce.", "help in the development of a new species of sea turtles." ]
C
null
medmcqa
medmcqa_05_00756
A 14 year old boy has difficulty in expressing himself in writing and making frequent spelling mistakes, does not follow instruction and cannot wait for his turn while playing a game. He is likely to be suffering from
[ "Mental retardation", "Lack of interest in studies", "Specific learning disability", "Examination anxiety" ]
C
The Child may suffer from Specific learning disability If one find difficulty in expressing himself in writing and making frequent spelling mistakes, does not follow instruction and cannot wait for his turn while playing a game. Reference: GHAI Essential pediatrics, 8th edition
sciq
sciq_01_03540
The human body has as many as two trillion lymphocytes, and lymphocytes make up about 25% of all of what?
[ "glands", "leukocytes", "red blood cells", "pathogens" ]
B
The human body has as many as two trillion lymphocytes, and lymphocytes make up about 25% of all leukocytes. The majority of lymphocytes are found in the lymphatic system, where they are most likely to encounter pathogens. The rest are found in the blood. There are two major types of lymphocytes, called B cells and T c...
sciq
sciq_01_02019
Gene expression is regulated primarily at the what level?
[ "binding", "translational", "transcriptional", "manufacturing" ]
C
Gene expression is regulated primarily at the transcriptional level.
medmcqa
medmcqa_05_04508
In which fetal presentation vaginal delivery can be expected?
[ "Face presentation when the chin lies direct to the sacrum", "Brow presentation", "Shoulder presentation", "Face presentation when the chin lies under the symphsis pubis" ]
D
Vaginal delivery is not possible in Brow presentation Shoulder presentation Mentoposterior presentation of face
ARC-Easy
arc_04_00612
Sarah's class is learning about mixtures and solutions. Her teacher writes four statements on the board. Which statement best describes a mixture?
[ "Both substances mix evenly.", "Both substances can evaporate.", "One substance dissolves into another.", "One substance can be separated from the other." ]
D
null
medmcqa
medmcqa_05_04058
MC complication of chickenpox in children –
[ "Encephalitis", "Sec. bacterial infection", "Pneumonia", "Otitis media" ]
B
The most common infectious complication of varicella is a secondary bacterial superinfection of the skin, which is usually caused by Streptococcus pyogenes or Staphylococcus aureus. The most common extracutaneous site of involvement in children is CNS → Meningitis, Encephalitis, cerebellar, ataxia, Reye's syndrome Vari...
math_qa
mathqa_03_03309
a firm is comprised of partners and associates in a ratio of 2 : 63 . if 50 more associates were hired , the ratio of partners to associates would be 1 : 34 . how many partners are currently in the firm ?
[ "5", "10", "12", "20" ]
D
the ratio 1 : 34 = 2 : 68 so the ratio changed from 2 : 63 to 2 : 68 . 68 - 63 = 5 which is 1 / 10 of the increase in 50 associates . the ratio changed from 20 : 630 to 20 : 680 . thus the number of partners is 20 . the answer is d .
sciq
sciq_01_04963
What does the thymus gland produce?
[ "b cells", "t cells", "insulin", "hormones" ]
B
Organs of the lymphatic system include the tonsils, thymus gland and spleen. The thymus gland produces T cells or T-lymphocytes (see below) and the spleen and tonsils help in fighting infections. The spleen’s main function is to filter the blood. The spleen also detects viruses and bacteria and triggers the release of ...
medmcqa
medmcqa_05_03821
Areola and papilla forming secondary mound in adolescent girls is classified under which stage of sexual maturity rating (SMR)?
[ "SMR Stage 2", "SMR Stage 3", "SMR Stage 4", "SMR Stage 5" ]
C
Ans: C (SMR Stage 4) Ref: Nelson Textbook of Pediatrics, 19th edition. Pg 651Explanation:Classification of Sex Maturity States in GirlsSMRStagePubic HairBreasts1PreadolescentPreadolescent2Sparse, lightly pigmented, straight, medial border of labiaBreast and papilla elevated as small mound; diameter of areola increased3...
ARC-Challenge
arc_04_02755
During which phase of the Moon could a solar eclipse take place?
[ "full", "new", "quarter", "crescent" ]
B
null
ARC-Easy
arc_04_00017
A student in an empty classroom shouts, "Hello!" Which best explains what the student hears after the shout?
[ "an increased loudness of sound", "a reflection of sound", "an increased frequency of sound", "a refraction of sound" ]
B
null
ARC-Easy
arc_04_02010
When bedrock in Massachusetts is examined, it often appears scraped and polished. Which of the following most likely caused the bedrock to appear scraped and polished?
[ "crustal deformation", "frequent earthquakes", "glacial movement", "volcanic eruptions" ]
C
null
medmcqa
medmcqa_05_01849
First response to decreased blood volume
[ "Increased hea rate", "Tachypnea", "Hypotension", "Disorientation" ]
A
Baroreceptor reflex is an immediate compensatory mechanism in shock. There is stimulation of aerial baroreceptors and so sympathetic output is increased leading to vasoconstriction and reflex tachycardia. Ref: Textbook of medical physiology by N Geetha, 2nd edition, page no. 184
sciq
sciq_01_03220
Internal body fluids link exchange surfaces to what else?
[ "ligaments", "organs", "tissue", "body cells" ]
D
math_qa
mathqa_03_03590
if a fraction is multiplied by itself and then divided by the reciprocal of the same fraction , the result is 18 26 / 27 . find the fraction .
[ "8 / 27", "1 1 / 3", "2 2 / 3", "3 / 3" ]
C
answer if the required fraction be p according to the question ( p x p ) / ( 1 / p ) = 1826 / 27 ⇒ p 3 = 512 / 27 ∴ p = 8 / 3 = 2 2 / 3 correct option : c
sciq
sciq_01_05719
An amide bond joining two amino acid units is called a what?
[ "precipitate bond", "peptide bond", "ammonia bond", "carboxyl bond" ]
B
An amide bond joining two amino acid units is called a peptide bond. Note that the product molecule still has a reactive amino group on the left and a reactive carboxyl.
ARC-Easy
arc_04_02123
In some national parks, controlled fires are maintained by firefighters. Which of these is one of the major reasons for using controlled burns to maintain certain ecosystems?
[ "to give nonnative plants a chance to colonize the region", "to prevent the spread of pests that cause damage to plants", "to replace matured plants with saplings of the same species", "to rid the forest floor of accumulated deadwood and brush" ]
D
null
medmcqa
medmcqa_05_04882
What is the volume of reservoir bag used in neonatal resuscitation –
[ "240 ml", "500 ml", "750 ml", "1000ml" ]
A
Neonate → 250 ml, children upto 3 years → 500 ml, children > 3 years → 1000 ml, adults → 2000 ml.
sciq
sciq_01_01670
What does the second number in a blood pressure reading measure?
[ "epithelial pressure", "optimal pressure", "diastolic pressure", "external pressure" ]
C
Blood pressure is read as two numbers. The first number is the systolic pressure. The systolic pressure is the pressure on the blood vessels when the heart beats. This is the time when there is the highest pressure in the arteries. The diastolic pressure, which is the second number, is when your blood pressure is lowes...
openbookqa
obqa_02_03813
Rabbits with white fur are hardest to detect in
[ "a forest in Spring", "The middle of a well-lit street", "Mexico in the Winter", "the arctic in Winter" ]
D
snow falls during the winter in the arctic environment
openbookqa
obqa_02_01840
A person wants to find chloroplasts in great amounts, so they check
[ "stems", "buds", "extended portions", "dry seeds" ]
C
most chloroplasts are found in the leaves of a plant
ARC-Easy
arc_04_01713
Which of the following energy conversions takes place in a battery-operated flashlight?
[ "electrical -> mechanical -> light", "chemical -> mechanical -> light", "chemical -> electrical -> light", "nuclear -> electrical -> light" ]
C
null
ARC-Easy
arc_04_00376
Which characteristic is the best example of an inherited trait?
[ "eye color", "an infection", "knowledge of soccer", "length of hair" ]
A
null
sciq
sciq_01_03937
The mole fraction of the solvent is just one minus the mole fraction of what?
[ "solute", "solution", "molecules", "nutrients" ]
A
The molarity is 0.0129 M, the molality is 0.0129 m, the mole fraction is 2.33 × 10 , and the solution contains 1830 ppm Na2HPO4. Mole fraction is most useful for calculating vapor pressure, because Raoult’s law states that the vapor pressure of a solution containing a non-volatile solute is equal to the mole fraction o...
math_qa
mathqa_03_03886
two boys starts from the same place walking at the rate of 5.5 kmph and 7.5 kmph respectively in the same direction . what time will they take to be 32 km apart ?
[ "18", "16", "19", "15" ]
B
"explanation : relative speed = 7.5 - 5.5 = 2 kmph ( because they walk in the same direction ) distance = 32 km time = distance / speed = 32 / 2 = 16 hr answer : b"
sciq
sciq_01_05389
In addition to a nucleus what do eukaryotic cells have?
[ "electrons", "organelles", "nutrons", "protons" ]
B
Eukaryotic cells have a nucleus and membrane-bound structures called organelles.
medmcqa
medmcqa_05_02413
A 26 year old infeile PCOS patient, treated with ovulation induction with clomiphene citrate, presents with sudden onset of abdominal pain and distension with ascites after 20 days of staing the tratment. what is the probable cause ?
[ "Uterine rupture", "Ectopic pregnancy rupture", "Multifetal pregnancy causing uterine distention", "Ovarian Hyperstimulation syndrome" ]
D
OHSS is a medical complication that is completely iatrogenic and unique to stimulatory infeility treatment. Its symptoms are the result of ovarian enlargement and fragility, extravascular fluid accumulation, and intravascular volume depletion Vascular endothelial growth factor , whose expression in granulosa cells and ...
medmcqa
medmcqa_05_02225
A village is divided into five relevant subgroups for the purpose of a survey. Individuals from each subgroup are then selected randomly. This type of sampling is termed as:
[ "Simple Random sampling", "Stratified sampling", "Cluster Sampling", "Systematic Sampling" ]
B
Stratified samples are used when fixed numbers are needed from paicular sections or strata of the population in order to achieve balance across ceain impoant factors. The scenario as seen in this question, shows a study in which a random sample of equal number of individuals are drawn from each of five relevant subgrou...
medmcqa
medmcqa_05_01773
The drug NOT used for analgesia in a head injury patient is:
[ "Morphine", "NSAIDS", "Rofecoxib", "Acetaminofen" ]
A
Morphine is contraindicated in patients with a head injury because by retaining CO2, it increases intracranial tension which will add to that caused by the head injury itself. Even therapeutic doses can cause marked respiratory depression in these patients. Vomiting, miosis, and altered mentation produced by morphine i...
medmcqa
medmcqa_05_01956
Increase in LDH levels is seen in?
[ "Bulky disease", "Lymphoma", "Liver metastasis", "Lung metastasis" ]
A
ANSWER: (A) Bulky diseaseREF: Harrison's 18th ed various pagesThough in the given question all options can show raised LDH. The examiner was most probably asking about the highest levels of LDH.LDH is used in assessment of tissue breakdown in general or hemolysis. It is used to follow-up cancer (especially lymphoma) pa...
openbookqa
obqa_02_01279
Pushing an object requires what?
[ "wind", "water", "heavy exertion", "flowers" ]
C
pushing an object requires force
sciq
sciq_01_09618
What was the appendix used for in the past but is no longer needed for?
[ "produce food", "fight infection", "sense danger", "digest food" ]
D
The appendix is a tiny remnant of a once-larger organ. In a distant ancestor, it was needed to digest food. If your appendix becomes infected, a surgeon can remove it. You won’t miss it because it no longer has any purpose in the human body.
ARC-Challenge
arc_04_02918
Which of these occurs due to the rotation of Earth?
[ "the seasons", "day and night", "the orbit of the Moon", "lunar and solar eclipses" ]
B
null
sciq
sciq_01_03980
What is the only way of transferring energy that doesn't require matter?
[ "evaporation", "mutation", "convection", "radiation" ]
D
Both conduction and convection transfer energy through matter. Radiation is the only way of transferring energy that doesn’t require matter. Radiation is the transfer of energy by waves that can travel through empty space. When the waves reach objects, they transfer energy to the objects, causing them to warm up. This ...
sciq
sciq_01_10109
Did the the open circulatory systems of molluscs and arthropods arise dependently or independently of each other?
[ "independently", "dependently", "separately", "together" ]
A
medmcqa
medmcqa_05_02028
Winging of scapula is due to paralysis of...... nerve:
[ "Long thoracic", "Axillary", "Radial", "Median" ]
A
A. i.e. Long thoracic nerve Winging of scapula is excessive prominence of medial border of scapula seen in injury to long thoracic nerve (n. of bell)Q due to paralysis of serratus anteriorQ
sciq
sciq_01_10542
The three long muscles on the back of the knee are part of which group?
[ "synovial joint", "hamstring group", "patella", "adductors" ]
B
of the proximal tibia. This versatile muscle flexes the leg at the knee and flexes, abducts, and laterally rotates the leg at the hip. This muscle allows us to sit cross-legged. The posterior compartment of the thigh includes muscles that flex the leg and extend the thigh. The three long muscles on the back of the knee...
medmcqa
medmcqa_05_01166
Which drug acts through alpha subunit of GABA receptor?
[ "Benzodiazepine", "Barbiturate", "Haloperidol", "TCA" ]
A
Benzodiazepine acts at alpha unit of GABA receptor predominately, barbiturates acts at other sites The chloride channel is gated by the primary ligand GABA. The benzodiazepine (BZD) receptor modulates GABAA receptor in either direction: agonists like diazepam facilitate, while inverse agonists like DMCM hinder GABA med...
medmcqa
medmcqa_05_03488
Volume of orbit is
[ "19 ml", "29 ml", "39 ml", "49 ml" ]
B
Answer- B. 29 mlVolume of each orbit is 29 ml.Orbit is made up of 7 bones: frontal, ethmoid, lacrimal, palatine, maxilla, zygomatic and sphenoid
openbookqa
obqa_02_04171
migration is when what move to different locations in an annual cycle?
[ "animal figurines", "sedentary animals", "habitual creatures", "currents" ]
C
migration is when animals move to different locations in an annual cycle
sciq
sciq_01_05141
How many electrons can be accommodated in the first electron shell's orbital?
[ "3", "1", "2", "none" ]
C
math_qa
mathqa_03_01705
a searchlight on top of the watchtower makes 2 revolutions per minute . what is the probability that a man appearing near the tower will stay in the dark for at least 10 seconds ?
[ "5 / 6", "3 / 4", "2 / 3", "1 / 2" ]
C
"the searchlight completes one revolution every 30 seconds . the probability that the man ' s area will be lit up is 10 / 30 = 1 / 3 . the probability that he will stay in the dark is 1 - 1 / 3 = 2 / 3 the answer is c ."
medmcqa
medmcqa_05_00293
In Rh negative mother, who has delivered a Rh positive baby, prophylactic anti-D is indicated: March 2004
[ "If the direct Coomb's test is negative", "If the indirect Coomb's test is positive with rising titres", "If the ICT is positive", "As a routine procedure" ]
A
Ans. A i.e. If the direct Coomb's test is negative
math_qa
mathqa_03_00499
john is going with 10 friends on a trip to sidney for spring break . airfare and hotel costs a total of $ 12100.00 for the group of 11 friends . how much does each person have to pay for their hotel and airfare ?
[ "$ 1010", "$ 1100", "$ 1110", "$ 1101" ]
B
answer = b the total cost of the trip ( $ 12100.00 ) divided by 11 equals $ 1100.00 .
openbookqa
obqa_02_02390
A camouflaged creature in a patterned room will be
[ "quick to spot", "fast to locate", "rough to spot", "easy to see" ]
C
An example of camouflage is when something is the same color as its environment
openbookqa
obqa_02_03524
When is hotter?
[ "desert", "night", "morning", "noon" ]
D
the sun is located directly overhead at noon
math_qa
mathqa_03_02856
243 has been divided into 3 parts such that half of the first part , one - third of the second part and one - fourth of the third part are equal . the largest part is ?
[ "12628", "23488", "26688", "26667" ]
A
explanation : ratio of their shares = ( 35000 * 8 ) : ( 42000 * 10 ) = 2 : 3 . reena ' s share rs . 31570 * ( 2 / 5 ) = rs . 12628 . answer : a ) 12628
sciq
sciq_01_04600
Salt in seawater causes it to have greater what, which is also affected by temperature and pressure?
[ "mass", "volume", "area", "density" ]
D
Seawater has lots of salts in it. This increases its density (mass per volume) over fresh water. Temperature and pressure also affect density.
ARC-Challenge
arc_04_02692
If enough heat is taken away from a container of water, what will happen to the water?
[ "It will begin to boil.", "It will become a solid.", "It will turn into a gas.", "It will increase in weight." ]
B
null
sciq
sciq_01_01395
What large dwarf planet in our solar system was only discovered in 2005?
[ "eris", "artemis", "Cerus", "zeus" ]
A
Eris is the largest known dwarf planet in the solar system. It is 27 percent larger than Pluto ( Figure above ). Like Pluto and Makemake, Eris is in the Kuiper belt. But Eris is about three times farther from the Sun than Pluto. Because of its distance, Eris was not discovered until 2005. Early on, it was thought that ...
medmcqa
medmcqa_05_02473
Weight Gain in the second year of life is _____________
[ "1 kg", "2 kg", "3 kg", "4 kg" ]
C
The average bih weight of neonates is about 3 kg. During the first a few days after bih, the newborn loses extracellular fluid equivalent to about 10% of the body weight. Most infants regain their bih weight by the age of 10 days. Subsequently, they gain weight at a rate of approximately 20-40 g per day for the first 3...
medmcqa
medmcqa_05_03595
Which of the following antiviral drugs is used against HCV infection?
[ "Acyclovir", "Sofosbuvir", "Oseltamivir", "Adefovir" ]
B
Sofosbuvir is a direct acting anti-viral drug used against HCV infection. It is a nucleotide analog that inhibits HCV RNA polymerase (NS-5B). The active from of sofosbuvir competes with uridine triphosphate for incorporation into HCV RNA by NS5B polymerase. -Acyclovir: DOC for Herpes simplex virus 1 and 2 and also DOC ...
math_qa
mathqa_03_04445
if 9 men can reap 80 hectares in 24 days , then how many hectares can 36 men reap in 30 days ?
[ "127", "237", "387", "400" ]
D
"explanation : let the required no of hectares be x . then men - - - hectares - - - days 9 - - - - - - - - - 80 - - - - - - - - - 24 36 - - - - - - - - - x - - - - - - - - - 30 more men , more hectares ( direct proportion ) more days , more hectares ( direct proportion ) x = 36 / 9 * 30 / 24 * 80 x = 400 answer : d"
math_qa
mathqa_03_02663
in 130 m race , a covers the distance in 36 seconds and b in 45 seconds . in this race a beats b by :
[ "20 m", "25 m", "22.5 m", "26 m" ]
D
"distance covered by b in 9 sec . = 130 / 45 x 9 m = 26 m . a beats b by 26 metres . answer : option d"
sciq
sciq_01_10143
Said to go hand-in-hand with science, what evolves as new materials, designs, and processes are invented?
[ "technology", "invention", "biology", "industry" ]
A
Technology evolves as new materials, designs, and processes are invented.
ARC-Challenge
arc_04_02915
There are four stages to the life cycle of a butterfly: adult, pupa, egg, and caterpillar. Which of these occurs first?
[ "egg", "adult", "pupa", "caterpillar" ]
A
null
math_qa
mathqa_03_04638
the sum of the first 70 positive even integers is 4,970 . what is the sum of the first 70 odd integers ?
[ "4500", "4600", "4300", "4900" ]
D
sum of first n even numbers = n ( n + 1 ) = 4970 sum of first n odd numbers = n ^ 2 = 70 * 70 = 4900 ( here n = 70 ) answer : d
sciq
sciq_01_03882
What is a measure of how hot or cold the air is?
[ "variation", "relativity", "precipitation", "temperature" ]
D
math_qa
mathqa_03_04771
a person was asked to state his age in years . his reply was , ` ` take my age 4 years hence , multiply it by 4 and subtract 4 times my age 4 years ago and you will know how old i am . ' ' what was the age of the person ?
[ "18", "32", "27", "26" ]
B
"explanation : let the present age of person be x years . then , 4 ( x + 4 ) - 4 ( x - 4 ) = x < = > ( 4 x + 16 ) - ( 4 x - 16 ) = x < = > x = 32 . . answer : b"
sciq
sciq_01_08427
What is the quantity of force multiplied by the time it is applied called?
[ "density", "impulse", "gravity", "velocity" ]
B
The quantity of force multiplied by the time it is applied is called impulse.
medmcqa
medmcqa_05_02059
Occurs in which of the following condition Eosinopenia
[ "Asthma", "Hooworm infertation", "Chronic mycloid leukemia", "Custing disease" ]
D
Solution: Due to high levels of cortisol in Custing disease cosinopenia occurs.
openbookqa
obqa_02_01982
An object inside a freezer will become less excited with energy an therefore become
[ "cold", "round", "warm", "nervous" ]
A
something in a cold place becomes cold
sciq
sciq_01_05451
What are gemstones known as when light cannot pass through them?
[ "protective", "inorganic", "blocking", "opaque" ]
D
Most gemstones are not used exactly as they are found in nature. Usually, gems are cut and polished. Figure below shows an uncut piece of ruby and a ruby that has been cut and polished. The way a mineral splits along a surface allows it to be cut to produce smooth surfaces. Notice that the cut and polished ruby sparkle...
sciq
sciq_01_10581
The short length of what in women is the best explanation for the greater incidence of uti in women?
[ "uterus", "vagina", "urethra", "fallopian tube" ]
C
Female Urethra The external urethral orifice is embedded in the anterior vaginal wall inferior to the clitoris, superior to the vaginal opening (introitus), and medial to the labia minora. Its short length, about 4 cm, is less of a barrier to fecal bacteria than the longer male urethra and the best explanation for the ...
sciq
sciq_01_06725
All solutions contain at least how many substances?
[ "four", "three", "one", "two" ]
D
All solutions contain at least two substances.
ARC-Challenge
arc_04_02539
Which of the following Earth layers has the greatest density?
[ "crust", "mantle", "inner core", "outer core" ]
C
null
ARC-Easy
arc_04_01140
Which is the best example of recycling?
[ "using low energy appliances", "washing and reusing plastic cups", "using empty milk cartons as flower planters", "using aluminum cans to make new products" ]
D
null
sciq
sciq_01_01256
What molecules are usually insoluble in water?
[ "polar", "non-polar", "acids", "ions" ]
B
Non-polar molecules are usually insoluble in water.
medmcqa
medmcqa_05_00042
The peripheral workers in a primary health centre return one day late; after an immunisation session. The primary health centre is locked. The vaccine carrier still contains a few unopened ls of DPT vaccine and sufficient ice. The workers are to ?
[ "Return the vaccine ls to the refrigerator in the morning of the next day", "Get the health centre opned the same evening and keep the vaccine ls in the refrigerator", "Discard the vaccine ls", "Retain the vaccine in the ice box" ]
D
Ans. is 'd' i.e., Retain the vaccine in the ice box To solve this question one should have the basic knowledge of cold chain. The cold chain The cold chain is a system of storage and transpo of vaccines at low temperature from the manufacturer to the actual vaccination site. o The cold chain system is necessary because...
medmcqa
medmcqa_05_03367
After head injury, biconvex, lenticular shape hematoma in CT scan is characterstic of which of the following ?
[ "Extradural haemorrhage", "Subdural haemorrhage", "Intracerebral hematoma", "Diffuse-axonal injury" ]
A
Ans is 'a' ie Extradural haemorrhage CT scan (non-contrast) is the best diagnostic method to evaluate a head injury pt. (better than MRI) On CT scan ? Extradural haemorrhage appears as biconvex lentiform opacity. Subdural haemorrhage appears as concavoconvex crescentic opacity. Intracerebral blood appears on small foci...
ARC-Challenge
arc_04_02782
A parent and a child share several characteristics. Both individuals are tall, have curly hair, are good cooks, and have freckles. Which of these characteristics is a learned behavior?
[ "being tall", "having curly hair", "being a good cook", "having freckles" ]
C
null
math_qa
mathqa_03_04796
the cost price of a radio is rs . 1860 and it was sold for rs . 1340 , find the loss % ?
[ "18 %", "12 %", "22 %", "27 %" ]
D
"1860 - - - - 520 100 - - - - ? = > 27 % answer : d"
sciq
sciq_01_06811
What type of bonds only form in metals?
[ "liquid bonds", "friction bonds", "metallic bonds", "optical bonds" ]
C
Special bonds form in metals that do not form in other classes of elements. They are called metallic bonds. The bonds explain some of the unique properties of elements in the metals class.
medmcqa
medmcqa_05_02672
20 years old female came with complaint of a palpable painless mass in right breast. On examination, mass was mobile and hard in consistency. Ultrasound of right breast was performed . Most likely diagnosis is?
[ "Breast cyst", "Ductal papilloma", "Fibroadenoma", "Phylloid's tumour" ]
C
Ultrasound shows a well-defined hypoechoic lesion seen in right breast . Given the clinical history and age of the patient, most likely diagnosis is fibroadenoma . Breast cyst is anechoic on USG.
openbookqa
obqa_02_00258
Why is it dangerous for an animal to be kept boxed up in an area without air circulation?
[ "it will be confused", "it might get too viscious", "it will be scared", "it might get overheated" ]
D
if an organism becomes too hot then that organism may die
sciq
sciq_01_10057
What is the water that falls from the sky called?
[ "moisture", "precipitation", "condensation", "evaporation" ]
B
Clouds are needed for precipitation. Precipitation is water that falls from the sky. This may fall as liquid water, mostly as rain . It may fall also as frozen water, such as snow.
sciq
sciq_01_06474
Why does warm air rise higher in the troposphere?
[ "it is more dense than cool air", "it is less flourishing than cool air", "it is less dense than cool air", "It contains hydrogen" ]
C
Air in the troposphere is warmer closer to Earth’s surface. Warm air is less dense than cool air, so it rises higher in the troposphere. This starts a convection cell. Convection mixes the air in the troposphere. Rising air is also a main cause of weather. All of Earth’s weather takes place in the troposphere.
sciq
sciq_01_09599
As the organism grows more sophisticated, what happens to the process of gene regulation?
[ "becomes simplified", "becomes more complex", "becomes fractured", "degenerates" ]
B
As the organism grows more sophisticated, gene regulation becomes more complex, though prokaryotic organisms possess some highly regulated systems. Some human genes are controlled by many activators and repressors working together. Obviously, a mutation in a cis-regulatory region, such as the promoter, can greatly affe...
ARC-Challenge
arc_04_02728
Sea-floor spreading occurs at divergent boundaries. Which statement best identifies the geologic process taking place at the point where sea-floor spreading occurs?
[ "a trench is forming", "new crust is forming", "oceanic crust is subducting", "a continental plate is subducting" ]
B
null
sciq
sciq_01_05356
What are mudskipper fish able to do in short distances?
[ "run", "spit", "walk", "tumble" ]
C
Thomas H Brown. Mudskippers are fish that are able to walk short distances . CC-BY 2.0.
ARC-Easy
arc_04_00433
A meeting of scientists, called a symposium, occurs every year to share recent research about the atmosphere of Earth. This symposium mainly serves which purpose in science?
[ "to test research methods used by other scientists", "to develop questions about space research", "to discuss the meaning of new discoveries", "to explain gas properties to the general public" ]
C
null
medmcqa
medmcqa_05_04198
A young man with TB presents with massive recurrent hemoptysis. For angiographic treatment which vascular structure should be evaluated first?
[ "Pulmonary aery", "Bronchial aery", "Pulmonary Vein", "Superior vena cava" ]
B
Most common vessel responsible for the hemoptysis in TB, even in bronchitis, bronchogenic carcinoma is the bronchial aery. Bronchial aery angiography with embolization has become a mainstay in the treatment of hemoptysis. Major complications are rare and immediate clinical success defined as cessation of hemorrhage ran...
sciq
sciq_01_05803
Nuclear power plants produce electricity through what?
[ "induced fission", "severe fission", "High Fission", "intense fission" ]
A
Nuclear power plants produce electricity through induced fission.
medmcqa
medmcqa_05_04186
An ideal subcenter for a rural population should cater a population of -
[ "1000", "2000", "5000", "6000" ]
C
The sub-center is the peripheral outpost of the existing health delivery system in rural areas.They are being established on the basis of one sub-center for every 5000 population in general and one for every 3000 population in hilly and tribal areas (refer pgno:903 park 23rd edition)
medmcqa
medmcqa_05_03266
Which of the following is a date rape drug
[ "flunitrazepam", "Buprenorphine", "Clonidine", "methadone" ]
A
flunitrazepam , MDMA, gamma hydroxy Butyrate are called as date rape drugs Date rape drugs are any type of drug used to make <a style="box-sizing: border-box; background-color: transparent; color: ; text-decoration-line: none;" href=" style="box-sizing: border-box; background-color: transparent; color: ; text-decoratio...
sciq
sciq_01_01903
What is the term for cellular eating?
[ "Pinocytosis", "phagocytosis", "consumption", "ancylosis" ]
B
Phagocytosis , or cellular eating, occurs when the dissolved materials enter the cell. The plasma membrane engulfs the solid material, forming a phagocytic vesicle.
sciq
sciq_01_00421
Organisms that obtain food from outside themselves (i.e. they don't make their own food) are known as what?
[ "fungi", "autotrophs", "zygotes", "heterotrophs" ]
D
Fungi are heterotrophs, meaning they obtain food from outside themselves.
math_qa
mathqa_03_00743
a tank contains 10,000 gallons of a solution that is 7 percent sodium chloride by volume . if 2,500 gallons of water evaporate from the tank , the remaining solution will be approximately what percent sodium chloride ?
[ "1.25 %", "3.75 %", "9.33 %", "10.67 %" ]
C
"the remaining solution will be approximately what percent sodium chloride ? means : what percent of the remaining solution is sodium chloride . now , since the remaining solution is 10,000 - 2,500 = 7,500 gallons and sodium chloride is 700 gallons ( 7 % of initial solution of 10,000 gallons ) then sodium chloride is 7...
medmcqa
medmcqa_05_03123
Kupffer cells are a type of
[ "Dendritic cells", "Maqrophages", "B cells", "T cells" ]
B
Macrophages (Kupffer Cells) in the Liver Sinusoids.ln the liver sinusoids, lined with tissue macrophages called Kupffer cellsRef: Guyton and Hall textbook of medical physiology 13th edition. Page: 459
sciq
sciq_01_03058
What helps to regulate consciousness, arousal, and sleep states?
[ "thalamus", "hippocampus", "cerebral cortex", "hypothalamus" ]
A
Basal Ganglia Interconnected brain areas called the basal ganglia (or basal nuclei), shown in Figure 35.20b, play important roles in movement control and posture. Damage to the basal ganglia, as in Parkinson’s disease, leads to motor impairments like a shuffling gait when walking. The basal ganglia also regulate motiva...