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math_qa
mathqa_03_03415
12 men work 8 hours per day to complete the work in 10 days . to complete the same work in 4 days , working 15 hours a day , the number of men required ?
[ "15 days", "12 days", "16 days", "18 days" ]
C
that is , 1 work done = 12 × 8 × 10 then , 12 8 × 10 = ? × 15 × 6 ? ( i . e . no . of men required ) = 12 × 8 × 10 / 15 × 6 = 16 days c )
sciq
sciq_01_06225
Which organisms break down either organic or inorganic molecules to supply energy for the cell?
[ "spicule organisms", "photoreactive organisms", "asexual organisms", "chemotrophic organisms" ]
D
Chemotrophic organisms break down either organic or inorganic molecules to supply energy for the cell. Some chemotrophic organisms can also use their organic energy-supplying molecules as a carbon supply, which would make them chemoheterotrophs.
sciq
sciq_01_10694
The direction of the rotation of hurricanes is influenced by which force?
[ "headwind force", "jetstream force", "coriolis force", "centrifugal force" ]
C
Coriolis force to the right. Just the opposite occurs in the southern hemisphere; there, the force is to the left. Because Earth’s angular velocity is small, the Coriolis force is usually negligible, but for large-scale motions, such as wind patterns, it has substantial effects. The Coriolis force causes hurricanes in ...
medmcqa
medmcqa_05_00453
A 29yrs old nulliparous woman complains of severe menorrhagia and lower abdominal pain since 3months .On examination there was a 14 weeks size uterus with fundal fibroid .The treatment of choice is
[ "Myomectomy", "GnRH analogues", "Hysterectomy", "Observation" ]
A
Routes of myomectomy : Abdominal myomectomy Vaginal myomectomy: Done in case of submucosal pedunculated fibroid Hysteroscopic myomectomy: Submucosal fibroid which cannot be removed by simple vaginal route can be removed with the help of hysteroscope use when myoma <5 cms in size Laproscopic myomectomy: Indicated for pe...
sciq
sciq_01_08724
What is the common term for single-celled fungi?
[ "mushrooms", "yeasts", "prokaryotes", "sponges" ]
B
Most fungi are multicellular, but some exist as single cells. Single-celled fungi are known as yeasts. Fungi spend most of their life cycle in the haploid state. They form diploid cells only during sexual reproduction. Like the cells of protists and plants, the cells of fungi have cell walls. But fungi are unique in ha...
medmcqa
medmcqa_05_00019
Hyperacute rejection occurs within:?
[ "12 hours", "2 weeks", "1 month", "3 months" ]
A
Ans. (a) 12 hours(Ref: Robbins 9th ed p 233)Hyperacute rejection occurs when preformed antidonor antibodies are present in the circulation of the recipient. This form of rejection occurs within minutes or hours after transplantation. A hyperacutely rejecting kidney rapidly becomes cyanotic, mottled, and flaccid, and ma...
sciq
sciq_01_08821
Photoreceptors in each ocellus receive light only through the opening where there are none of which cells?
[ "secreted", "opqaue", "pigmented", "clear" ]
C
openbookqa
obqa_02_00138
A car slowed down because of
[ "bad brakes", "the engine size", "the wind", "the steering wheel" ]
C
a force acting on an object in the opposite direction that the object is moving can cause that object 's speed to decrease in a forward motion
math_qa
mathqa_03_00026
a pet groomer has 7 animals to groom for the day ( 2 cats and 5 dogs ) . if she randomly selects 4 animals to groom before lunch , what is the probability she will finish all the cats before lunch ?
[ "3 / 7", "2 / 7", "12 / 13", "5 / 11" ]
B
combination probability formula : ncr = n ! / [ r ! ( n - r ) ! ] total possible , select 4 animals from 7 animals = 7 c 4 = 7 ! / [ 4 ! ( 7 - 4 ) ! ] = 35 . to finish all 2 cats there must be 2 dogs , select 2 dogs from 5 = 5 c 2 = 10 . and , select 2 cats from 2 = 2 c 2 = 1 . 2 cats and 2 dogs = ( 1 ) ( 10 ) = 10 pro...
medmcqa
medmcqa_05_00844
Midgut is supplied by?
[ "Superior mesenteric artery", "Inferior mesenteric artery", "Celiac trunk", "Anastomotic arcade of various arteries" ]
A
ANSWER: (A) Superior mesenteric arteryREF: Langmans medical embryology 9th edition page 298, http://en.wikipedia.org.wikipedia org/wiki/H uman_gasto inte stinal_tractThe midgut is supplied with blood by the superior mesenteric artery and innervated by the vagus nerve.Since the foregut is supplied by the celiac artery a...
ARC-Easy
arc_04_00946
The water contained in a geyser system gains energy from the underground material surrounding it. The water molecules gain kinetic energy and this results in an increase in the pressure of the water. Eventually the geyser erupts and expels water into the air above ground. Which of the following types of energy is the s...
[ "electrical", "magnetic", "mechanical", "thermal" ]
D
null
sciq
sciq_01_11123
What is a disease in which the immune system makes an inflammatory response to a harmless antigen?
[ "bronchitis", "cancer", "an allergy", "heartburn" ]
C
An allergy is a disease in which the immune system makes an inflammatory response to a harmless antigen . Any antigen that causes an allergy is called an allergen. Allergens may be inhaled or ingested, or they may come into contact with the skin. Two common causes of allergies are shown in Figure below . Inhaling ragwe...
openbookqa
obqa_02_04727
If a species of animal is endangered or going extinct, it's because too many of them have stopped
[ "mating", "hugging", "nothing", "dying" ]
A
if members of a species are born then the population of that species increases
sciq
sciq_01_08506
What term refers to the breaking stress that will cause permanent deformation or fracture of a material?
[ "viscosity", "elasticity", "tensile strength", "malleability" ]
C
makes it clear that the deformation is proportional to the applied force. Figure 5.13 shows the Hooke’s law relationship between the extension ΔL of a spring or of a human bone. For metals or springs, the straight line region in which Hooke’s law pertains is much larger. Bones are brittle and the elastic region is smal...
openbookqa
obqa_02_00302
if a person remotely controls a machine to do something, which of these is required?
[ "a thing for information", "these are all incorrect", "a meal to eat", "a floral plant life" ]
B
a computer controls a robot
sciq
sciq_01_10622
The primary amine in which the nitrogen atom is attached directly to a benzene ring has a special name, what is it?
[ "aldehyde", "cyanide", "nitrate", "aniline" ]
D
The primary amine in which the nitrogen atom is attached directly to a benzene ring has a special name—aniline. Aryl amines are named as derivatives of aniline.
ARC-Easy
arc_04_00048
Which characteristic is affected by interactions with the environment?
[ "weight", "eye color", "blood type", "handedness" ]
A
null
sciq
sciq_01_08262
If a quantity of a reactant remains unconsumed after complete reaction has occurred, it is?
[ "reduced", "missing", "static", "in excess" ]
D
The stoichiometry of a reaction describes the relative amounts of reactants and products in a balanced chemical equation. A stoichiometric quantity of a reactant is the amount necessary to react completely with the other reactant(s). If a quantity of a reactant remains unconsumed after complete reaction has occurred, i...
sciq
sciq_01_05135
What occurs when two nonpolar liquids are mixed?
[ "nonpolar-nonpolar interactions", "sediment - nonpolar interactions", "refracted - nonpolar interactions", "polar-nonpolar interactions" ]
A
Nonpolar-nonpolar interactions occur when two nonpolar liquids are mixed. An example of this is the interaction between toluene and octane (see Figures above and below ). The interactions between a molecule of toluene and a molecule of octane are relatively weak, but so are the toluene-toluene and octane-octane interac...
openbookqa
obqa_02_01403
A person in space will find a lack of something to drink if they land on
[ "Mars", "the earth", "the moon", "third planet" ]
C
the moon does not contain water
openbookqa
obqa_02_02659
If a thing is going to consume something that moves it is
[ "nursing", "birthing", "perusing", "grazing" ]
C
An example of hunting is an otter cracking open clams with a rock
sciq
sciq_01_11172
What travels 9.5 trillion kilometers a year?
[ "light", "electricity", "air", "Sound" ]
A
the distance light can travel in one year, 9.5 trillion kilometers.
sciq
sciq_01_06137
What is a group of similar ecosystems with the same general abiotic factors and primary producers?
[ "taxon", "biome", "family", "ecoregion" ]
B
The two photos in Figure above represent two different biomes. A biome is a group of similar ecosystems with the same general abiotic factors and primary producers. Producers are organisms that produce food for themselves and other organisms. Biomes may be terrestrial or aquatic.
openbookqa
obqa_02_02902
How many full moons are there each month
[ "1,000", "twenty", "100", "less than two" ]
D
the moon orbiting the Earth approximately occurs 13 times per year
sciq
sciq_01_07583
What is a homogeneous mixture also known as?
[ "element", "mixture", "solution", "structure" ]
C
A solution is another name for a homogeneous mixture. http://catalog. flatworldknowledge. com/bookhub/reader/2547 - gob-ch01defined a mixture as a material composed of two or more substances. In a solution, the combination is so intimate that the different substances cannot be differentiated by sight, even with a micro...
openbookqa
obqa_02_01059
the arctic area is full of
[ "white powder", "ice cold drinks", "warm water", "fluffy white dirt" ]
A
the arctic environment is covered in snow
ARC-Challenge
arc_04_02544
Which graph is best to present data collected on yearly water usage in the United States?
[ "bar graph", "line graph", "scatterplot", "circle graph" ]
B
null
medmcqa
medmcqa_05_00285
Platypilea is seen in
[ "Diaphragmatic palsy", "Pleural effusion", "pulmonary embolism", "Lt atrial tumor" ]
B
platypnea ohodeoxia is typically an ove symptom when the patient's posture changes from the supine to the upright position. .Especially when a significant pleural ef- fusion (hydrothorax) is present, the intrathoracic effusion spreads diffusely over the posterior space of the thorax in the supine position. Ref Davidson...
openbookqa
obqa_02_03992
if a person commits arson, which of these might be found as the source in the remains?
[ "a new cold water bottle", "a new portable stove", "a new hot coffee", "a blue plastic comb" ]
B
a hot plate is a source of heat
openbookqa
obqa_02_02972
if a farmer needed the plants in the garden to multiply, which of these could help?
[ "introduction of cactus plants", "introduction of grasshoppers to the garden", "introduction of Bombyliidae to the garden", "introduction of weevils in the garden" ]
C
plant reproduction requires pollination
ARC-Easy
arc_04_00775
In which process is nitrogen from the air put into a form that plants can use?
[ "nitrification", "denitrification", "nitrogen saturation", "nitrogen fixation" ]
D
null
openbookqa
obqa_02_00434
What is an example of the Earth rotating on its axis?
[ "constellations are only visible in some parts of the world during certain months", "cloud coverage varies depending on the season", "it is always cold in Antarctica", "the equator moves up and down around the Earth" ]
A
the Earth rotates on its axis on its axis
sciq
sciq_01_07159
What do you call any force that makes something move in a circle?
[ "momentum", "centripetal force", "cyclical", "tangential force" ]
B
Centripetal Force is an umbrella term that refers to any force that makes something move in a circle. Examples of forces that can be centripetal forces are as follows: Gravity (the gravity between the Earth and Sun causes the Earth to go in a circle), Friction (the friction force between a car’s tires and the road caus...
ARC-Challenge
arc_04_03024
Sam was listing the differences between a euglena and a paramecium. Which characteristic should not be on Sam's list?
[ "only the euglena can respond to light", "only the euglena have a definite shape", "only the euglena use a flagellum to move", "only the euglena can make their own food" ]
B
null
math_qa
mathqa_03_02524
65 % of the employees of a company are men . 60 % of the men in the company speak french and 40 % of the employees of the company speak french . what is % of the women in the company who do not speak french ?
[ "4 %", "10 %", "97.14 %", "90.14 %" ]
C
"no of employees = 100 ( say ) men = 65 women = 35 men speaking french = 0.60 * 65 = 39 employees speaking french = 0.4 * 100 = 40 therefore women speaking french = 40 - 39 = 1 and women not speaking french = 35 - 1 = 34 % of women not speaking french = 34 / 35 * 100 = 97.14 % answer c"
sciq
sciq_01_09807
What is the dominant form of plant life in most terrestrial ecosystems, comprising about 90 percent of all plant species?
[ "pteridophytes", "gymnosperms", "angiosperms", "bryophytes" ]
C
26.3 Angiosperms Angiosperms are the dominant form of plant life in most terrestrial ecosystems, comprising about 90 percent of all plant species. Most crops and ornamental plants are angiosperms. Their success comes from two innovative structures that protect reproduction from variability in the environment: the flowe...
sciq
sciq_01_00237
The two stages of photosynthesis are the light reactions and what?
[ "digestive cycle", "respiratory cycle", "calvin cycle", "reproductive cycle" ]
C
The two stages of photosynthesis are the light reactions and the Calvin cycle. Do you see how the two stages are related?.
ARC-Easy
arc_04_00721
Which example shows a new substance being formed?
[ "a candle burning", "a shoelace being tied", "a pipe being cut in half", "a block of ice melting" ]
A
null
sciq
sciq_01_05038
Late adulthood begins in the mid-60s and continues until?
[ "birth", "adolescence", "death", "youth" ]
C
Late adulthood begins in the mid-60s and continues until death. This is the stage of life when most people retire from work. This frees up their time for hobbies, grandchildren, or other interests. For example, the man in Figure below enjoys creating music in old age.
sciq
sciq_01_04535
Lack of what mineral causes rickets?
[ "potassium", "zinc", "calcium", "magnesium" ]
C
Rickets is softening of the bones in children that occurs because bones do not have enough calcium. Rickets can lead to fractures and bowing of the leg bones, which is illustrated in the Figure below .
sciq
sciq_01_03733
Community interactions are important factors in what?
[ "natural selection", "natural change", "natural resources", "natural process" ]
A
A community is the biotic component of an ecosystem. It consists of the populations of all the species that live in the same area. Populations in communities often interact with each other. Community interactions are important factors in natural selection. They help shape the evolution of the interacting species. Types...
ARC-Easy
arc_04_01312
Which characteristic would best help a land animal survive in a cold Arctic climate?
[ "thick fur", "large ears", "smooth feet", "slender body" ]
A
null
math_qa
mathqa_03_02910
dean winchester has got a long wooden stock of size 60 feet , he need to cut small stock of size 1 feet long using his axe . he takes 5 minutes to cut one small stock ( 1 feet ) , how long will he take to make 60 such small stocks ?
[ "296 minutes .", "297 minutes .", "295 minutes .", "294 minutes ." ]
C
solution : 295 minutes . when he cut 59 stocks , the 60 th stock will remain . 59 * 5 = 295 minutes . answer c
math_qa
mathqa_03_02750
36 men can complete a piece of work in 18 days . in how many days will 9 men complete the same work ?
[ "24", "77", "88", "72" ]
D
"explanation : less men , means more days { indirect proportion } let the number of days be x then , 9 : 36 : : 18 : x x = 72 answer : d ) 72 days"
medmcqa
medmcqa_05_00930
A person returns to Delhi from Bangladesh after 2 days and has diarrhoea. Stool examination shows RBCs in Stool. The likely organism causing is ?
[ "Enteropathogenic E. Coli", "Enterotoxigenic E. Coli", "Salmonella typhi", "Shigella dysentriae" ]
D
Ans. is 'd' i.e., Shigella Dysentriae . The person is suspected to have traveller's diarrhoea. . The most common cause of traveller's diarrhoea is E.coli , but the strains of the E.coli (Enterotoxigenic & Enteropathogenic) given in the choice do not produce invasive illness i.e presence of blood in stool. . It is a fea...
ARC-Challenge
arc_04_02956
Which action has most helped scientists find cures to some diseases?
[ "buying new equipment", "learning about bacteria", "finding chemicals in plants", "avoiding poisonous animals" ]
B
null
sciq
sciq_01_08802
What muscle in the chest helps inflate and deflate the lungs?
[ "pectoral", "heart", "cartilage", "diaphragm" ]
D
Mammals breathe with the help of a diaphragm. This is the large muscle that extends across the bottom of the chest below the lungs. When the diaphragm contracts, it increases the volume of the chest. This decreases pressure on the lungs and allows air to flow in. When the diaphragm relaxes, it decreases the volume of t...
sciq
sciq_01_10986
What does an underwater spider use to breathe and keep alive?
[ "forehead air bubble", "gills", "metallic air bubble", "shiny air bubble" ]
D
11.8 Cohesion and Adhesion in Liquids: Surface Tension and Capillary Action Cohesion and Adhesion in Liquids Children blow soap bubbles and play in the spray of a sprinkler on a hot summer day. (See Figure 11.27. ) An underwater spider keeps his air supply in a shiny bubble he carries wrapped around him. A technician d...
medmcqa
medmcqa_05_02530
Grey Turner sign is seen in:
[ "A/c pancreatitis", "C/c pancreatitis", "A/c cholecystitis", "A/c parotitis" ]
A
Ans: a (A/c pancreatitis) Ref: Bailey & Love, 24th ed, p. 1123Grey Ttorner sign - Bleeding into fascial plane can produce bluish discoloration in flanksCullen sign - Bleeding into fascial plane can produce bluish discolouration around umbilicusNeither sign is pathognomonic of a/c pancreatitis. Both these signs indicate...
sciq
sciq_01_01504
Transport of nutrients and regulation of body temperature through fluid flow are characteristics of which bodily system?
[ "gastrointestinal", "peripheral", "cardiovascular", "reproductive" ]
C
Two horrific contraptions on frictionless wheels are compressing a spring by compared to its uncompressed (equilibrium) length. Each of the vehicles is stationary and they are connected by a string. The string is cut! Find the speeds of the vehicles once they lose contact with the spring.
ARC-Easy
arc_04_01866
Students perform an investigation designed to measure the daily growth of a bean plant. Which should the students do every day of this investigation?
[ "record data", "form hypothesis", "form conclusion", "define variables" ]
A
null
sciq
sciq_01_07502
What organs absorb water and nutrients from the soil?
[ "roots", "leaves", "flowers", "buds" ]
A
sciq
sciq_01_07780
How is population density expressed?
[ "number per area", "arable land per capita", "per arable land", "number per household" ]
A
Ecologists look at many factors that help to describe a population. First, ecologists can measure the number of individuals that make up the population, known as population size . They can then determine the population density , which is the number of individuals of the same species in an area. Population density can b...
ARC-Easy
arc_04_01419
Which is the best example of an inherited behavior?
[ "a bear knowing the best place to catch salmon", "a cat clawing on a tree to sharpen its claws", "a dog coming when it hears a bell", "a horse trotting its way back to the barn" ]
B
null
medmcqa
medmcqa_05_04848
A known case of COPD is on treatment with theophylline. Which of the following side effect will be commonly seen due to inhibition of PDE4?
[ "Headache", "Diuresis", "Cardiac arrhythmias", "Epileptic seizures" ]
A
The most common side effects are headache, nausea, and vomiting (due to inhibition of PDE4), abdominal discomfo, and restlessness. There may also be increased acid secretion (due to PDE inhibition) and diuresis (due to inhibition of adenosine A1 receptors). At high concentrations, cardiac arrhythmias may occur as a con...
openbookqa
obqa_02_02626
With more people eating cereal there comes a need for more
[ "butter", "top soil", "water", "corn" ]
D
as the use of a crop increases , the amount of crops planted will increase
math_qa
mathqa_03_03714
find the simple interest on rs . 567 for 7 months at 9 paisa per month ?
[ "s . 357.21", "s . 322.12", "s . 400", "s . 278.9" ]
A
"explanation : i = ( 567 * 7 * 9 ) / 100 = 357.21 answer : option a"
math_qa
mathqa_03_00795
there were totally 100 men . 83 are married . 75 have t . v , 85 have radio , 70 have a . c . how many men have t . v , radio , a . c and also married ?
[ "11", "12", "13", "14" ]
C
100 - ( 100 - 83 ) - ( 100 - 75 ) - ( 100 - 85 ) - ( 100 - 70 ) = 100 - 17 - 25 - 15 - 30 = 100 - 87 = 13 answer : c
openbookqa
obqa_02_00438
Which of the following, when plugged into an outlet, completes a circuit?
[ "gold", "glass", "plastic", "rubber" ]
A
when an electrical conductor is plugged into an outlet , a circuit is completed
sciq
sciq_01_00274
Electrons in covalent compounds are shared between the two atoms, unlike the case in what type of bonds?
[ "soluble bonds", "ionic bonds", "horizontal bonds", "weak bonds" ]
B
The two materials do have at least one thing in common. The atoms in the materials are held together by covalent bonds. These bonds consist of electrons shared between two or more atoms. Unlike ionic bonds, where electrons are either lost or gained by an atom to form charged ions, electrons in covalent compounds are sh...
openbookqa
obqa_02_03339
After life all things
[ "decompose", "freeze in time", "become lively", "regenerate" ]
A
dead organisms decay
sciq
sciq_01_02128
A winter storm is called what?
[ "blizzard", "gale", "snow storm", "tempest" ]
A
A storm is an episode of severe weather caused by a major disturbance in the atmosphere. Storms can vary a lot in the time they last and in how severe they are. A storm may last for less than an hour or for more than a week. It may affect just a few square kilometers or thousands. Some storms are harmless and some are ...
medmcqa
medmcqa_05_04623
Which antithyroid drug can be safely used in pregnancy
[ "Propylthiouracil", "I121", "Methimazole", "Carbimazole" ]
A
This question has been repeated several times before. Remember these important points. All antithyroid drugs can cross placenta so risk of fetal hypothyroidism and goitre is always there. Both carbimazole and propylthiouracil can be used during pregnancy, but propylthiouracil is the drug of choice because its greater ...
sciq
sciq_01_10039
What is formed when different gases are confined to the same container?
[ "linear mixture", "homogeneous mixture", "particulate mixture", "compact mixture" ]
B
Gases mix homogeneously when confined to same container. When several gases are added to a container, the individual gas particles mix freely, forming a homogeneous mixture in which each type of gas is randomly distributed throughout all the available volume.
openbookqa
obqa_02_01384
A car converts gasoline into motion and heat through what?
[ "explosive charisma", "cooling", "incineration", "warming" ]
C
a car engine usually converts gasoline into motion and heat through combustion
openbookqa
obqa_02_00503
What is a source of energy for animals?
[ "rocks", "plastic food", "metal", "nutriment" ]
D
food is a source of energy for animals
sciq
sciq_01_06042
During what do homologous chromosomes separate and go to different daughter cells?
[ "mitosis", "birth", "electrolysis", "meiosis" ]
D
Overview of Meiosis. During meiosis, homologous chromosomes separate and go to different daughter cells. This diagram shows just the nuclei of the cells. Notice the exchange of genetic material that occurs prior to the first cell division.
sciq
sciq_01_05979
Sponges possess an internal skeleton called what?
[ "endoskeleton", "fluid skeleton", "hydrostatic skeleton", "exoskelton" ]
A
Sponges have an internal skeleton that gives them support and protection. An internal skeleton is called an endoskeleton . A sponge endoskeleton consists of short, sharp rods called spicules (see Figure below ). Spicules are made of silica, calcium carbonate, or spongin, a tough protein. They grow from specialized cell...
sciq
sciq_01_03658
An increase in what, across the periodic table, explains why elements go from metals to metalloids and then to nonmetals?
[ "electrons", "neutrons", "protons", "temperature" ]
A
The increase in electrons across the periodic table explains why elements go from metals to metalloids and then to nonmetals from left to right across the table. Look at period 2 in Figure below as an example. Lithium (Li) is a metal, boron (B) a metalloid, and fluorine (F) and neon (Ne) are nonmetals. The inner energy...
medmcqa
medmcqa_05_04894
Maximum sterilizing effect is shown with which of the following anti TB drug?
[ "Rifampicin", "Streptomycin", "INH", "Pyrazinamide" ]
D
Pyrazinamide acts on slow-growing bacteria inside the macrophages causing maximum sterilization., Ref: Katzung 13th /819
sciq
sciq_01_04079
Cytokinins promote cell division and prevent what?
[ "apoptosis", "senescence", "deficiency", "mutations" ]
B
Cytokinins Promote cell division; prevent senescence.
openbookqa
obqa_02_01896
As an individual is forced to pedal harder on a bicycle their pulse rate
[ "stays the same", "decreases", "stops", "increases" ]
D
as energy required for an activity increases , pulse will increase
sciq
sciq_01_08459
The db gene encodes the which receptor?
[ "estrogen", "opioid", "leptin", "glucose" ]
C
medmcqa
medmcqa_05_04500
On upper GI endoscopy, "watermelon stripes" is seen in which of the following condition?
[ "Chronic gastric varices", "Carcinoma stomach", "Antral vascular ectasia", "Dieulafoy lesion" ]
C
Gastric antral vascular ectasia (GAVE) It is cause of acute or chronic gastrointestinal blood loss. GAVE is responsible of about 4% of non-variceal upper GI haemorrhage. On endoscopy, characteristic pattern of longitudinal stripes of edematous, erythematous mucosa that alternate with less severely injured, paler mucosa...
sciq
sciq_01_04671
Scientists can use what tool to determine an earthquake's strength?
[ "geiger counter", "telescope", "kilocalorie", "seismogram" ]
D
Seismograms record earthquake strength. Scientists can use them to determine the distance to an earthquake. Using at least three seismograms, they can locate the earthquake's epicenter. Scientists measure earthquake intensity in several ways. So far no one has found a way to predict earthquakes.
math_qa
mathqa_03_02563
find the fraction which has the same ratio to 2 / 5 that 3 / 8 has to 1 / 5
[ "1 / 15", "3 / 4", "5 / 8", "9 / 6" ]
B
"p : 2 / 5 = 3 / 8 : 1 / 5 as the product of the means is equal to the product of the extremes . p * 1 / 5 = 2 / 5 * 3 / 8 p * 1 / 5 = 6 / 40 p = 3 / 4 = > p = 3 / 4 answer : b"
ARC-Easy
arc_04_00693
What can a moving magnet in a coil of copper wire cause?
[ "an electric current", "friction on wheels", "an increase in gravity", "a decrease in heat" ]
A
null
math_qa
mathqa_03_00496
what is the least number of square tiles required to pave the floor of a room 11 m 50 cm long and 1 m 50 cm broad ?
[ "724", "804", "69", "844" ]
C
"solution length of largest tile = h . c . f . of 1150 cm & 150 cm = 50 cm . area of each tile = ( 50 x 50 ) cm 2 ∴ required number of tiles = [ 1150 x 150 / 50 x 50 ] = 69 . answer c"
sciq
sciq_01_07823
But a point mutation can also change a codon for an amino acid into a what?
[ "axon", "stop mutation", "exon", "stop codon" ]
D
sciq
sciq_01_09662
Each daughter cell represents one outcome of all possible combinations of maternal and paternal what?
[ "alleles", "chromosomes", "genes", "traits" ]
B
openbookqa
obqa_02_04911
It is very difficult for carrots to grow in
[ "topsoil", "Kansas", "peat", "adobe" ]
D
the looseness of soil has a positive impact on a plant 's roots' growth in that soil
sciq
sciq_01_10409
What is it called when your joints start to wear out and they become stiff and painful?
[ "endometriosis", "tendonitis", "arthritis", "adenitis" ]
C
During late adulthood, people are not as physically able. For example, they usually have less muscle and slower reflexes. Their immune system also doesn’t work as well as it used to. As a result, they have a harder time fighting diseases like the flu. The risk of developing diseases such as heart disease and cancer con...
openbookqa
obqa_02_02733
The Earth's energy creates
[ "Happiness", "Love", "Anger", "a magnetic creation" ]
D
the Earth absorbs more energy than it loses
sciq
sciq_01_05841
What organ system is comprised of your heart, blood, and blood vessels all working together?
[ "cardiovascular system", "digestive system", "thoraxic system", "nervous system" ]
A
Your heart pumps blood around your body. But how does your heart get blood to and from every cell in your body? Your heart is connected to blood vessels such as veins and arteries. Organs that work together form an organ system . Together, your heart, blood, and blood vessels form your cardiovascular system .
medmcqa
medmcqa_05_00496
Chymotrypsinogen is a
[ "Zymogen", "Carboxypeptidase", "Transaminase", "Elastase" ]
A
Ans. is 'a' i.e. Zymogen * Proteolytic digestive enzymes known as proteases have two main classes depending on specificity for the amino acids forming the peptide bond to be hydrolysed.
ARC-Challenge
arc_04_02423
Which of the following is a central role of carbon in the chemistry of living organisms?
[ "Carbon can only bond with other carbon atoms.", "Carbon is a solvent that breaks chemical bonds.", "Carbon readily forms ionic bonds that separate easily.", "Carbon can form many types of molecules with covalent bonds." ]
D
null
math_qa
mathqa_03_03653
what is the square root of 4,624 ?
[ "a", "b", "c", "d" ]
C
"a square root of a number is a number times itself equals the original number . ex ) the square root of 81 is 9 because 9 times itself ( 9 ) equals the original number ( 81 ) . 68 * 68 = 4,624 4624 divided by x = 68 x = 68 ( c ) 68"
medmcqa
medmcqa_05_02520
At 9 weeks, approximate CRL in mm of a fetus would be:
[ "8 mm", "2.5 mm", "9 mm", "5 mm" ]
B
Crown rump length(CRL) is measured from the top of the head to the bottom of buttocks excluding limbs.CRL between 9 and 11 weeks is the most accurate method of dating.Error is about +/- 5 days.CRL in cm +6.5 gives a rough estimate of gestational age in weeks.Uesful prior to amniocentesis and chorion sampling and to con...
medmcqa
medmcqa_05_02452
Claustrophobia means :
[ "Fear of heights", "Fear of lizards", "Fear of closed spaces", "Fear of open spaces" ]
C
C i.e. Fear of closed spaces
math_qa
mathqa_03_02046
the difference between a positive proper fraction and its reciprocal is 9 / 20 . the fraction is ?
[ "4 / 5", "4 / 7", "5", "5 / 7" ]
A
"let the required fraction be x . then 1 - x = 9 x 20 1 - x 2 = 9 x 20 20 - 20 x 2 = 9 x 20 x 2 + 9 x - 20 = 0 20 x 2 + 25 x - 16 x - 20 = 0 5 x ( 4 x + 5 ) - 4 ( 4 x + 5 ) = 0 ( 4 x + 5 ) ( 5 x - 4 ) = 0 x = 4 / 5 option a"
medmcqa
medmcqa_05_03891
Cholangiocarcinoma has been associated with infection by:
[ "Paragonimus westermani", "Clonorchis sinensis", "Loa Loa", "Schistosoma haematobium" ]
B
Risk Factors for Cholangiocarcinoma Choledocholithiasis Clonorchis sinensis and Opisthorchis viverrini Cirrhosis Radon Asbestos, Nitrosamines, Dioxin (AND) Diabetes, Obesity, OCPs, Smoking, Thorotrast, Isoniazid (DOSTI) Most common symptom is jaundice IOC - MRI + MRCP Rx Hilar cholangiocarcinoma - CBD Resection + routi...
medmcqa
medmcqa_05_01614
Tocolytic of choice in pregnancy with hea disease (OBG)
[ "Nifedipine", "MgSO4", "Atosiban", "Alcohol" ]
A
Calcium-channel blockers, especially nifedipine, are safer and more effective tocolytic agents than are B-agonists Nifedipine is the best first-line tocolytic agent available at this time. The initial dose should be 30 mg and subsequent doses 20 mg every 6 hours. MgSO4 which is an excellent drug for ecclampsia preventi...
medmcqa
medmcqa_05_01033
A patient presents with features of ataxia. He gives a h/o a painless penile ulcer around 3 years ago that was followed by a maculopapular rash. He is staed on treatment. The MOST sensitive test to monitor him while on treatment is:
[ "VDRL (Veneral Disease Research Laboratory)", "RPR", "TPI", "CSF pleocytosis" ]
D
This is case of Tabes dorsalis. It is a late manifestation of syphilis that presents as symptoms and signs of demyelination of the posterior columns, dorsal roots, and dorsal root ganglia. Symptoms: Ataxic wide-based gait and foot drop Paresthesia Bladder disturbances Impotence Areflexia Loss of positional, deep-pain, ...
sciq
sciq_01_01223
What is the term for protists that produce spores, such as the toxoplasm?
[ "sporozoans", "protozoans", "spermatozoa", "newborns" ]
A
The sporozoans are protists that produce spores, such as the toxoplasma . These protists do not move at all. The spores develop into new protists.
medmcqa
medmcqa_05_04661
Most important component of level of living is:(2004)
[ "Health", "Education", "Occupation", "Housing" ]
A
Ans: aRef: Park, 17th ed, p. 20 & 18th ed, p. 21
ARC-Challenge
arc_04_02685
What do the Milky Way Galaxy and other galaxies in the universe have in common?
[ "They are similar in shape.", "They rotate in the same direction.", "They contain the same number of stars.", "They have similar elements." ]
D
null
openbookqa
obqa_02_03996
the sun transfers solar energy from itself to the Earth through
[ "electricity", "water", "rocks", "sunradiation" ]
D
the sun transfers solar energy from itself to the Earth through sunlight
sciq
sciq_01_05976
Which proteins recognize and combine with harmful materials, including both toxic chemicals and invasive microorganisms?
[ "antibodies", "essential amino acids", "enzymes", "collagen" ]
A
Antibodies – These proteins recognize and combine with harmful materials, including both toxic chemicals and invasive microorganisms (such as bacteria and viruses). When an antibody binds to its target, it is tagged for destruction. This tag is recognized by white blood cells, which complete the process. Some antibodie...
medmcqa
medmcqa_05_04242
Position with least vital capacity in G.A.
[ "Trendelenburg", "Lithotomy", "Prone", "Lateral" ]
A
A i.e. Trendelenburg In trendelenburg position, head end is lowered so due to gravity and weight of intra-abdominal viscera, diaphragm is at its highest level causing compression of lungs; so vital capacity is lowered.
sciq
sciq_01_08074
The color of an object is determined by the what of it's reflected light?
[ "luminosity", "variation", "wavelength", "absorption" ]
C
We see an opaque object, such as the apple in Figure below , because it reflects some wavelengths of visible light. The wavelengths that are reflected determine the color that the object appears. For example, the apple in the figure appears red because it reflects red light and absorbs light of other wavelengths. We se...