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openbookqa
obqa_02_01378
Electrical conduction may occur when
[ "a person takes a trip", "a person gets a dog", "a person presses a key to a socket", "a person moves plastic into a car" ]
C
electrical conduction is when metals conduct electricity through metal
openbookqa
obqa_02_04636
A flashlight can be used to
[ "create warmness", "become a firefly", "travel to space", "harvest magic" ]
A
a flashlight emits light
sciq
sciq_01_05687
What scale is used to succinctly communicate the acidity or basicity of a solution?
[ "Richter scale", "ions", "ph", "solvent scale" ]
C
The pH scale is used to succinctly communicate the acidity or basicity of a solution.
openbookqa
obqa_02_02309
Which of the following burns due to wax?
[ "electric kettle", "internal combustion engine", "tea candle", "gas stove" ]
C
lighting a candle causes that candle to burn
sciq
sciq_01_03864
Animal starch, called glycogen, is stored in the liver and where else?
[ "nerves", "kidneys", "hands", "muscles" ]
D
Note the Pattern Because carbohydrates have a carbonyl functional group and several hydroxyl groups, they can undergo a variety of reactions. Two familiar polysaccharides are starch and cellulose, which both hydrolyze to produce thousands of glucose units. They differ only in the connection between glucose units and th...
math_qa
mathqa_03_00564
one side of a rectangle is 3 cm shorter than the other side . if we increase the length of each side by 1 cm , then the area of the rectangle will increase by 18 cm 2 . find the lengths of all sides .
[ "10 and 3", "7 and 10", "10 and 7", "3 and 10" ]
C
"let x be the length of the longer side x > 3 , then the other side ' s length is x − 3 cm . then the area is s 1 = x ( x - 3 ) cm 2 . after we increase the lengths of the sides they will become ( x + 1 ) and ( x − 3 + 1 ) = ( x − 2 ) cm long . hence the area of the new rectangle will be a 2 = ( x + 1 ) ⋅ ( x − 2 ) cm ...
math_qa
mathqa_03_04851
alok ordered 16 chapatis , 5 plates of rice , 7 plates of mixed vegetable and 5 ice - cream cups . the cost of each chapati is rs . 6 , that of each plate of rice is rs . 45 and that of mixed vegetable is rs . 70 . the amount that alok paid the cashier was rs . 961 . find the cost of each ice - cream cup ?
[ "25", "30", "29", "12" ]
B
"explanation : let the cost of each ice - cream cup be rs . x 16 ( 6 ) + 5 ( 45 ) + 7 ( 70 ) + 6 ( x ) = 961 96 + 225 + 490 + 5 x = 961 5 x = 150 = > x = 30 . answer : b"
openbookqa
obqa_02_04245
A thing which has a texture may have that texture observed by an eyeless creature through
[ "contact", "sight", "smell", "sound" ]
A
touch can be used for detecting texture
medmcqa
medmcqa_05_03849
The risk of recurrence of congenital hea disease
[ "0.80%", "1%", "2-6%", "10-12%" ]
C
Only 2-8 % of congenital hea diseases recur Ref : page no 412 ghai pediatrics eighth edition
medmcqa
medmcqa_05_01042
Mechanism of action of Nitric oxide is through
[ "cGMP", "cAMP", "Ca++", "Tyrosine" ]
A
Nitric oxide is formed from Arginine, released from endothelial cells and acts through cGMP to cause vasodilation.
medmcqa
medmcqa_05_01061
The Investigation of choice in a 55-year-old postmenopausal women who has presented with postmenopausal bleeding is:
[ "Pap smear", "Fractional curettage", "Transvaginal ultrasound", "CA-125 estimation" ]
B
Common causes of postmenopausal bleeding Genital malignancy (Me) Decubitus ulcer DUB. Urethral caruncle. Senile endometritis DIAGNOSIS Speculum Examination If a growth is found, punch biopsy is to be taken. If no growth is visible and the cervix looks apparently healthy- Cervical smear Aspiration cytology Fractional cu...
openbookqa
obqa_02_01746
A carbonated beverage contains dissolved what?
[ "steel", "plastids", "plastic", "carbonic anhydride" ]
D
a carbonated beverage contains dissolved carbon dioxide
sciq
sciq_01_08430
Why is the root cap continuously replaced in plants?
[ "damage through pushing", "due to pressure", "due to rubbing", "due to growth" ]
A
Root Growth and Anatomy Root growth begins with seed germination. When the plant embryo emerges from the seed, the radicle of the embryo forms the root system. The tip of the root is protected by the root cap, a structure exclusive to roots and unlike any other plant structure. The root cap is continuously replaced bec...
medmcqa
medmcqa_05_04615
Best source of vitamin D -
[ "Fish liver", "Egg yolk", "Milk", "Papaya" ]
A
Ans. is 'a' i.e., Fish liver* Though vitamin D is synthesised when UV B photons strike 7 dehydrocholesterol of malphigian layer of skin epidermis, vitamin D is still considered as an essential micronutrient because Vitamin D produced from sunlight is not sufficient. Hence we are dependent on vitamin D supplementation i...
sciq
sciq_01_10124
What is a common chemical substance on planet earth?
[ "oxygen", "hydrogen", "water", "nitrogen" ]
C
Water is a common chemical substance on planet Earth. In fact, Earth is sometimes called the "water planet" because almost 75% of its surface is covered with water. If you look at Figure below , you will see where Earth’s water is found. The term water generally refers to its liquid state, and water is a liquid over a ...
sciq
sciq_01_09537
What is the primary energy source for cells?
[ "glucose", "glycogen", "sucrose", "protein" ]
A
Figure 8.5 The basic equation for photosynthesis is deceptively simple. In reality, the process takes place in many steps involving intermediate reactants and products. Glucose, the primary energy source in cells, is made from two three-carbon GA3Ps.
medmcqa
medmcqa_05_00503
Faded tattoo mark can be visualized by?
[ "Ultraviolet rays", "Spectrophotometer", "Ordinary light", "X-ray" ]
A
Ans. is 'a' i.e., Ultraviolet rays Latent tattoo marks (faded marks) can be visualized by:-o Use of ultraviolet light o Infrared photograpyo Rubbing the part and examining under magnifying glasso If tattoo marks are obscured by decomposition they can be visualized by treating with 3% H2O2.o Tattoo marks can be develope...
sciq
sciq_01_08458
What kind of family is haumea part of?
[ "eoan family", "a moclobemide family", "a collisional family", "orbital family" ]
C
Haumea is part of a collisional family. This is a group of astronomical objects that formed from an impact. This family has Haumea, its two moons, and five more objects. All of these objects are thought to have formed from a collision very early in the formation of the solar system.
ARC-Challenge
arc_04_03007
When a volcano erupts, lava flows out from the top. What type of rock is formed as the lava cools?
[ "magma", "igneous", "sedimentary", "metamorphic" ]
B
null
sciq
sciq_01_04113
What is defined as force per unit area?
[ "pressure", "resistance", "momentum", "energy" ]
A
Pressure is defined as force per unit area, .
openbookqa
obqa_02_01548
Explosions destroy
[ "Air", "communities", "darkness", "Sunlight" ]
B
explosions can cause harm to an organism
ARC-Challenge
arc_04_02259
Members of a planning team build a model of a nearby stream and then block the stream to show how it can form a lake. Which is a limitation of the model?
[ "showing how a nearby town will avoid flooding", "explaining how the lake will be used for recreation", "explaining how some of the water can be used for agriculture", "showing how the dam will affect the plants and animals in the area" ]
D
null
openbookqa
obqa_02_03873
a producer is a source of energy for
[ "shoes", "poetry", "external food eaters", "rubber" ]
C
a producer is a source of energy for consumers
ARC-Easy
arc_04_00489
In eukaryotic organisms, microtubules give cells structure, and microfilaments help the cell contract and move. Together, they combine to perform functions similar to what two human body systems?
[ "the endocrine and skeletal systems", "the circulatory and respiratory systems", "the skeletal and muscular systems", "the integumentary and excretory system" ]
C
null
math_qa
mathqa_03_00443
the measurements obtained for the interior dimensions of a rectangular box are 150 cm by 150 cm by 225 cm . if each of the three measurements has an error of at most 1 centimeter , which of the following is the closes maximum possible difference , in cubic centimeters , between the actual capacity of the box and the ca...
[ "90,000'", "95,000'", "93,000'", "92,000'" ]
A
the options are well spread so we can approximate . changing the length by 1 cm results in change of the volume by 1 * 150 * 225 = 33,750 cubic centimeters ; changing the width by 1 cm results in change of the volume by 150 * 1 * 225 = 33,750 cubic centimeters ; changing the height by 1 cm results in change of the volu...
openbookqa
obqa_02_04412
If a person's age is celebrated in adulthood, then it happens every
[ "12 months", "24 days", "six weeks", "twelve hours" ]
A
one year is equal to 365 days
sciq
sciq_01_00198
Land plants are classified into two major groups according to the absence or presence of what tissue?
[ "disease", "vascular", "bacterial", "root" ]
B
The Major Divisions of Land Plants Land plants are classified into two major groups according to the absence or presence of vascular tissue, as detailed in Figure 14.8. Plants that lack vascular tissue formed of specialized cells for the transport of water and nutrients are referred to as nonvascular plants. The bryoph...
sciq
sciq_01_05039
The concentration of a substance is the quantity of solute present in a given quantity of ___________?
[ "structure", "solution", "salutation", "mixture" ]
B
Summary The concentration of a substance is the quantity of solute present in a given quantity of solution. Concentrations are usually expressed as molarity, the number of moles of solute in 1 L of solution. Solutions of known concentration can be prepared either by dissolving a known mass of solute in a solvent and di...
ARC-Challenge
arc_04_02200
Franklin wants to know how fast he runs different distances. He uses a stopwatch to measure the time it takes him to complete a 50-meter, 100-meter, and 200-meter race. How can he calculate his speed for each race?
[ "Add the distances and the times.", "Divide the distances by the times.", "Multiply the distances by the times.", "Subtract the distances from the times." ]
B
null
ARC-Easy
arc_04_00076
Which lists the diameter of the planets in order from smallest to largest?
[ "Venus, Earth, Mercury, Mars", "Earth, Mars, Venus, Mercury", "Mars, Mercury, Earth, Venus", "Mercury, Mars, Venus, Earth" ]
D
null
sciq
sciq_01_05328
What is the joint where the pelvic girdle and leg come together?
[ "femur joint", "hip joint", "meniscus", "hip socket" ]
B
11.6 Appendicular Muscles of the Pelvic Girdle and Lower Limbs The pelvic girdle attaches the legs to the axial skeleton. The hip joint is where the pelvic girdle and the leg come together. The hip is joined to the pelvic girdle by many muscles. In the gluteal region, the psoas major and iliacus form the iliopsoas. The...
sciq
sciq_01_10588
An environment in which cells neither sink nor swell is known as what?
[ "pressured environment", "isotonic environment", "exothermic environment", "electrolyte environment" ]
B
Figure 41.2 Cells placed in a hypertonic environment tend to shrink due to loss of water. In a hypotonic environment, cells tend to swell due to intake of water. The blood maintains an isotonic environment so that cells neither shrink nor swell. (credit: Mariana Ruiz Villareal).
sciq
sciq_01_06162
If a ball is released from rest when air resistance is negligible, velocity is seen to increase linearly, while what related property is a constant?
[ "time", "density", "speed", "acceleration" ]
D
Figure 2.43 Positions and velocities of a metal ball released from rest when air resistance is negligible. Velocity is seen to increase linearly with time while displacement increases with time squared. Acceleration is a constant and is equal to gravitational acceleration.
sciq
sciq_01_08970
Sexual reproduction involves the production of haploid gametes by what?
[ "mitosis", "mutations", "meiosis", "lesions" ]
C
Cycle of Sexual Reproduction. Sexual reproduction involves the production of haploid gametes by meiosis. This is followed by fertilization and the formation of a diploid zygote. The number of chromosomes in a gamete is represented by the letter n. Why does the zygote have 2n, or twice as many, chromosomes?.
medmcqa
medmcqa_05_00386
Which of the following is the measure of catalytic efficiency of an enzyme?
[ "Kcat/Km", "Turnover number", "Km", "Kd/Km" ]
A
The kinetic parameters kcat and Km are useful for the study and comparison of different enzymes, with simple or complex reaction mechanisms. kcat and Km are used as an estimate for the kinetic efficiency of enzymes, but either parameter alone is insufficient for this purpose. For instance, two enzymes catalyzing differ...
sciq
sciq_01_06464
Algae are much simpler than protozoa. they are aquatic and contain this?
[ "sporozoa", "cloning factor", "chlorophyll", "testes" ]
C
22.11 Algae Algae are much simpler than protozoa. They are aquatic and contain chlorophyll. Algae can exist as a single cell or as giant seaweeds 60 m in length. Formerly, algae were classified as plants but this was incorrect as algae lack parts of true plants: leaves, stems, roots, xylem, and phloem. Since algae belo...
sciq
sciq_01_05369
Binary transition-metal compounds, such as the oxides and sulfides, are usually written with idealized what?
[ "stoichiometries", "speciation", "fluctuations", "noble gases" ]
A
VII *The convention of using roman numerals to indicate the oxidation states of a metal is used here. Binary transition-metal compounds, such as the oxides and sulfides, are usually written with idealized stoichiometries, such as FeO or FeS, but these compounds are usually cation deficient and almost never contain a 1:...
math_qa
mathqa_03_01139
the breath of a rectangle is three - fifths of the radius of a circle . the radius of the circle is equal to the side of the square , whose area is 2025 sq . units . what is the area ( in sq . units ) of the rectangle if the rectangle if the length is 10 units ?
[ "370 sq . units'", "270 sq . units'", "170 sq . units'", "470 sq . units'" ]
B
given that the area of the square = 2025 sq . units = > side of square = √ 2025 = 45 units the radius of the circle = side of the square = 45 units breath of the rectangle = 3 / 5 * 45 = 27 units given that length = 10 units area of the rectangle = lb = 27 * 10 = 270 sq . units answer : b
openbookqa
obqa_02_02262
Which of the following requires water to live?
[ "birds", "dirt", "soil", "rocks" ]
A
living things require water for survival
sciq
sciq_01_06165
What forms a ketone when oxidized?
[ "enzyme", "carbolic acid", "aldehyde", "secondary alcohol" ]
D
A secondary alcohol forms a ketone when oxidized. The secondary alcohol cannot be further oxidized to produce a carboxylic acid. Tertiary alcohols cannot be oxidized in this way, because the carbon atom bonded to the OH group is not also bonded to any hydrogens.
medmcqa
medmcqa_05_02072
Which of the following is not a prefabricated pontic:
[ "Long pin facing.", "Pontip.", "Perel pontic.", "Sanitary facing." ]
C
Example of prefabricated pontics are: Trupontic, Long pin facing, Flatback, Sanitary facings, Reverse pin facing, Pontips.
sciq
sciq_01_10640
Decay of what provides some of earth's internal heat?
[ "radioactive elements", "decaying elements", "ionic elements", "radioactive compounds" ]
A
Earth's internal heat does not depend on the Sun for energy. This heat comes from remnant heat when the planet formed. It also comes from the decay of radioactive elements. Radioactivity is an important source of energy.
medmcqa
medmcqa_05_01906
Psychoanalysis was founded by which of the following scientist -
[ "Eysenck", "Freud", "Jung", "Adler" ]
B
The credit for invention of psychoanalysis belong to Sigmund Freud.
sciq
sciq_01_00891
What kind of molecule is made from one or more long chains of amino acids?
[ "membrane molecule", "amino molecule", "chain molecule", "protein molecule" ]
D
A protein molecule is made from one or more long chains of amino acids, each linked to its neighbors by covalent bonds. Multiple chains of a protein are held together by weaker bonds.
math_qa
mathqa_03_04301
5 + 8
[ "8", "13", "28", "6" ]
B
b
sciq
sciq_01_07058
What is the process whereby excess water and waste is removed from the body?
[ "excretion", "exhalation", "diffusion", "filtration" ]
A
Excretion is any process in which excess water or wastes are removed from the body. Excretion is the job of the excretory system. Besides the kidneys, other organs of excretion include the large intestine, liver, skin and lungs.
sciq
sciq_01_00493
What term is used to describe a chemical released by an animal that affects the behavior or physiology of animals of the same species?
[ "enzyme", "amino", "isolate", "pheromone" ]
D
The amount of material left over after a certain number of half-lives can be easily calculated.
medmcqa
medmcqa_05_03645
A 45 year old male with a history of alcohol dependence presents with confusion, nystagmus and ataxia. Examination reveals 6th cranial nerve weakness. He is most likely to be suffering from:
[ "Korsakoff's psychosis", "Wernicke encephalopathy", "De Clerambault syndrome", "Delirium tremens" ]
B
Wernicke encephalopathy is characterised by a triad of confusion, ophthalmoplegia and ataxia in an alcoholic patient Ref : Harrison's Principles of Internal Medicine 21st ed
medmcqa
medmcqa_05_04262
The transition from G2 to M phase of the cell cycle is controlled by :
[ "Retinoblastoma gene product", "p53 protein", "Cyclin E", "Cyclin B" ]
D
Ans. is' D i.e. Cyclin BRef Robbins Illustrated 6th/e 284Cyclins control the passage of cells through specific phases of the cell cycleThe entry and progression of cells through the cell cycle are controlled by changes in levels and activities of cyclinsSo the levels of several of the cyclins peak during specific phase...
ARC-Easy
arc_04_01263
Which would most likely be the characteristic of an object with a small volume and large mass?
[ "high density", "low pressure", "low viscosity", "high temperature" ]
A
null
sciq
sciq_01_06423
What is the low level of radiation that occurs naturally in the environment called?
[ "background radiation", "consequence radiation", "temperature radiation", "neon radiation" ]
A
A low level of radiation occurs naturally in the environment. This is called background radiation. It comes from various sources. One source is rocks, which may contain small amounts of radioactive elements such as uranium. Another source is cosmic rays. These are charged particles that arrive on Earth from outer space...
sciq
sciq_01_01116
Which are the closest living relations to land plants?
[ "charophytes", "mammals", "arthropods", "sporozoans" ]
A
outcompete the green tint of chlorophyll, making these species appear as varying shades of red. Other protists classified as red algae lack phycoerythrins and are parasites. Red algae are common in tropical waters where they have been detected at depths of 260 meters. Other red algae exist in terrestrial or freshwater ...
sciq
sciq_01_08809
What is a measure of how much energy is needed to change the temperature of a substance?
[ "thermal potential", "momentum", "specific heat", "specific gravity" ]
C
where the mass, specific heat, and change in temperature are multiplied together. Specific heat is a measure of how much energy is needed to change the temperature of a substance; the larger the specific heat, the more energy is needed to change the temperature. The units for specific heat are depending on what the uni...
openbookqa
obqa_02_00246
Wax is on some plant leaves for what purpose?
[ "stay moist for warm weather", "keep water available for predators", "creation of toxins in the cells", "keep the ongoing hydration" ]
D
waxy leaves are used for storing water by some plants
sciq
sciq_01_03446
What are the organelles on which proteins are made during protein synthesis called?
[ "fibroblasts", "lysosomes", "ribosomes", "mitochondria" ]
C
Ribosomes are the organelles on which proteins are made during protein synthesis . Ribosomes are found throughout the cytosol of the cell and attached to the endoplasmic reticulum organelle. Ribosomes order amino acids using messenger RNA (mRNA) as a template in a process called translation. Ribosomes are made from com...
math_qa
mathqa_03_00971
the ages of two persons differ by 32 years . if 5 years ago , the elder one be 5 times as old as the younger one , their present ages ( in years ) are respectively
[ "20,20", "46,14", "25,15", "30,10" ]
B
"explanation : let their ages be x and ( x + 32 ) years . 5 ( x - 5 ) = ( x + 32 - 5 ) or 4 x = 52 or x = 14 . their present ages are 46 years and 14 years option b"
math_qa
mathqa_03_03414
the percentage profit earned by selling an article for rs . 1920 is equal to the percentage loss incurred by selling the same article for rs . 1280 . at what price should the article be sold to make 35 % profit ?
[ "2080", "2778", "2299", "2778" ]
A
let c . p . be rs . x . then , ( 1920 - x ) / x * 100 = ( x - 1280 ) / x * 100 1920 - x = x - 1280 2 x = 3200 = > x = 1600 required s . p . = 130 % of rs . 1600 = 130 / 100 * 1600 = rs . 2080 . answer : a
math_qa
mathqa_03_04721
a circular road runs round a circular ground . if the difference between the circumferences of the outer circle and inner circle is 66 metres , the width of the road is :
[ "5.25 m'", "7 m'", "10.5 m'", "21 m'" ]
C
2 π ( r - r ) = 60 = > 2 * 22 / 7 * ( r - r ) = 60 . therefore , ( r - r ) = ( 66 * 7 / 44 ) = 10.5 m answer : c
sciq
sciq_01_05815
What is the name for medical doctors that specialize in the diagnosis and treatment of diseases of the heart?
[ "surgeons", "cardiologists", "Doctors", "physicists" ]
B
Cardiologist Cardiologists are medical doctors that specialize in the diagnosis and treatment of diseases of the heart. After completing 4 years of medical school, cardiologists complete a three-year residency in internal medicine followed by an additional three or more years in cardiology. Following this 10-year perio...
medmcqa
medmcqa_05_00104
who gave the heirachy of motivation
[ "bleuler", "maslow", "lorenz", "seligman" ]
B
ABRAHAM MASLOW Gave the hierarchy of needs It is also called as hierarchy of motivation According to Maslow the basic needs should be met to move on to the next stage Once the basic step is attained, we work on to the higher stage The final stage is self-actualization, that is acceptance of your positives, negatives, s...
sciq
sciq_01_02426
The crocodilia order, which includes crocodiles, alligators, caimans, and gharils, is part of what class of animals?
[ "parasites", "reptiles", "mammals", "aquatic" ]
B
Crocodilia Reptiles in the Crocodilia Order are called crocodilians. They include crocodiles, alligators, caimans, and gharils. They have four sprawling legs that allow them to run surprisingly fast. They have strong jaws and replace their teeth throughout life. Crocodilians have relatively complex brains and greater i...
sciq
sciq_01_01779
What group of elements does sodium belong to?
[ "alkali metals", "metalloids", "halogens", "noble gases" ]
A
Sodium belongs to the group of elements called the alkali metals. An alkaline solution is another name for a solution that is basic. All alkali metals react readily with water to produce the metal hydroxide and hydrogen gas. The resulting solutions are basic.
medmcqa
medmcqa_05_02314
Investigation of choice for acute SAH is?
[ "DSA", "X ray", "CT scan", "MRI" ]
C
ANSWER: (C) CT scan REF: Sutton 7th ed p. 1779See APPENDIX-66 for "INVESTIGATION OF CHOICE"SUBARACHNOID HEMORRHAGEInvestigation of choice : non contrast CT scanIf scan fails : lumbar puncture to establish blood in CSFMost sensitive investigation for evaluating etiology : DSA of four vessels (carotids and vertebrals)Mos...
sciq
sciq_01_00496
What must happen for two ions to form an ionic bond?
[ "two ions need to have opposite charges", "Two ions need to be the same size", "two ions need to have the same charge", "two ions need to have neutral charges" ]
A
sciq
sciq_01_08873
Algae convert energy from the sun into food by means of what process?
[ "photosynthesis", "luminosynthesis", "compression", "glycolysis" ]
A
Algae is sometimes mocked as a source of fuel. But algae are a potentially wonderful source of power. They convert energy from the Sun into food by photosynthesis. Algae can be grown in desert areas where other crops cannot grow. Nutrients for algae may be wastes from other processes. Algae can be processed to be made ...
sciq
sciq_01_03643
Eukaryotic cell division involves mitosis and what?
[ "spermatogenesis", "meiosis", "cytokinesis", "electrolysis" ]
C
Eukaryotic cell division involves mitosis and cytokinesis.
medmcqa
medmcqa_05_01642
In osteoporosis, bone formation is increased by which drug
[ "Bisphosphonates", "Estrogen", "Calcitonin", "Teriparatide" ]
D
Drug used in osteoporosisInhibit resorption: Bisphosphonates, denosumab, cinacalcet, calcitonin, estrogen, SERMS, gallium nitrateStimulate formation: teriparatide, calcium, calcitriol, fluoridesBoth actions: Strontium renelate(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 400 - 412)
sciq
sciq_01_04097
What dangerous oxygen compound is found in ground level smog?
[ "sulfur dioxide", "argon", "ozone", "neon" ]
C
Photochemical smog consists mainly of ozone (O 3 ). The ozone in smog is the same compound as the ozone in the ozone layer,(O 3 ). But ozone in smog is found near the ground. Figure below shows how it forms. When nitrogen oxides and VOCs are heated by the Sun, they lose oxygen atoms. The oxygen atoms combine with molec...
math_qa
mathqa_03_00589
each of the products produced yesterday was checked by worker x or worker y . 0.5 % of the products checked by worker x are defective and 0.8 % of the products checked by worker y are defective . if the total defective rate of all the products checked by worker x and worker y is 0.6 % , what fraction of the products wa...
[ "1 / 5", "1 / 4", "1 / 3", "2 / 5" ]
C
"x : 0.5 % is 0.1 % - points from 0.6 % . y : 0.8 % is 0.2 % - points from 0.6 % . therefore the ratio of products checked by y : x is 1 : 2 . thus , worker y checked 1 / 3 of the products . the answer is c ."
sciq
sciq_01_01798
What broad group of living things serves as the major producers in terrestrial biomes?
[ "animals", "vases", "flowers", "plants" ]
D
Plants are the major producers in terrestrial biomes. They have five basic needs: air, warmth, sunlight, water, and nutrients. How well these needs are met in a given location depends on the growing season and soil quality, both of which are determined mainly by climate.
medmcqa
medmcqa_05_00566
Stress-induced analgesia occurs due to release of which of the following?
[ "Cannabinoids", "Coisol", "Serotonin", "Substance P" ]
A
Stress-induced analgesia: It is the reduced pain sensitivity when a person undergoes any stressful event. Eg. Soldiers injured in battle often don't feel any pain until the battle is over. Amygdala is a pa of the limbic system. It is responsible for mediating the motivational-affective responses to pain and is involved...
sciq
sciq_01_10665
Chemical equations in which heat is shown as either a reactant or a product are called what?
[ "thorium equations", "hydroelectric equations", "thermochemical equations", "feedstock equations" ]
C
2Al(s) + Fe2O3(s) → 2Fe(s) + Al2O3(s) + heat to indicate that heat is one of the products. Chemical equations in which heat is shown as either a reactant or a product are called thermochemical equations. In this reaction, the system consists of aluminum, iron, and oxygen atoms; everything else, including the container,...
ARC-Easy
arc_04_00414
Human muscle cells need nutrients and oxygen during exercise. The human body is able to meet the needs of the muscle cells during exercise by increasing
[ "digestion.", "excretion.", "secretion.", "circulation." ]
D
null
ARC-Easy
arc_04_00132
Gold atoms can be identified based on the number of which subatomic particles?
[ "neutrons", "electrons", "nuclei", "protons" ]
D
null
math_qa
mathqa_03_01215
a worker ' s daily wage is increased by 40 % and the new wage is $ 28 per day . what was the worker ' s daily wage before the increase ?
[ "$ 18", "$ 20", "$ 22", "$ 24" ]
B
"let x be the daily wage before the increase . 1.4 x = $ 28 x = $ 20 the answer is b ."
medmcqa
medmcqa_05_00515
Mild head injury is having Glasgow coma scale of ?
[ "5-Mar", "8-May", "10-Aug", "15-Oct" ]
D
Ans. is 'd' i.e., 10-15
math_qa
mathqa_03_04716
a grocer has a sale of rs . 5400 , rs . 9000 , rs . 6300 , rs . 7200 and rs . 4500 for 5 consecutive months . how much sale must he have in the sixth month so that he gets an average sale of rs . 5600 ?
[ "s . 1200", "s . 5400", "s . 5400", "s . 4999" ]
A
"total sale for 5 months = rs . ( 5400 + 9000 + 6300 + 7200 + 4500 ) = rs . 32400 . required sale = rs . [ ( 5600 x 6 ) - 32400 ] = rs . ( 33600 - 32400 ) = rs . 1200 . option a"
medmcqa
medmcqa_05_00133
Why albumin provides maximum contribution in the generation of oncotic pressure?
[ "High molecular weight, low concentration", "Low molecular weight, high concentration", "High molecular weight, high concentration", "Low molecular weight, low concentration" ]
B
The colloid osmotic pressure due to plasma colloids is called the oncotic pressure. It is determined by the number of molecules dissolved in a fluid rather than by the mass of these molecules. Albumin contributes the maximum to oncotic pressure compared to other proteins like globulins and fibrinogen because it has low...
medmcqa
medmcqa_05_02160
Benzodiazepine acts through:
[ "GABAA", "GABAB", "GABAC", "GABAD" ]
A
Ans: a (GABA A) Ref: KDT, 6 ed, p. 394The benzodiazepine receptor modulates GABA A receptor in either direction. Agonists like diazepam facilitate, while inverse agonists like DMCM hinder GABA A mediated Cl- channel opening and benzodiazepine antagonist like flumazenil block the action of both.GABAA BZD Receptor--Cl Ch...
openbookqa
obqa_02_03818
To measure the length of a elephant's trunk you would need
[ "a tape measure", "a tusk", "a scale", "a pool" ]
A
a meter stick is used to measure length
sciq
sciq_01_06169
What type of force exists between two touching surfaces?
[ "opposing", "centrifugal", "tension", "friction" ]
D
Friction is the force that resists motion. In most beginning physics classes, friction is ignored. Concepts can be understood and calculations made assuming friction to be nonexistent. Whenever physics intersects with the real world, however, friction must be taken into account. Friction exists between two touching sur...
medmcqa
medmcqa_05_03419
Earliest feature of radiation toxicity is
[ "Erythema", "Desquamation", "Edematous rough skin", "Hyperpigmentation" ]
A
Ans. a (Erythema). (Ref. Harrison, Principles of Medicine, 15th ed., 2562).RADIATION TOXICITY TO SKIN# Skin reaction can be seen with two weeks of fractionated radiotherapy (RT).# Erythema is the earliest observed feature followed by desquamation (dry/moist).# Chronic reaction can be seen starting at 6-12 months after ...
medmcqa
medmcqa_05_01512
A child presents with complaints of oliguria, abdominal distension and diarrhoea. On examination there is deep jaundice. Hepatomegaly was present measuring 4 cm below the costal margin. Conjugated bilirubin in blood was 38 mg/dL, and there was urine urobilinogen and bile pigments. Hemoglobin was 4mg/dL and serum creati...
[ "G-6-PD level in blood", "Serum ceruloplasmin", "Reticulocyte count", "Leptospiral antibody level" ]
B
Ans. is 'b' i.e., Serum ceruloplasmin level o Serum ceruloplasmin measurement is useful in the diagnosis of Wilson's disease, but Wilson's disease in the above patient can easily be ruled out because in Wilson's disease there is no renal involvement, where as the patient in question is having renal involvement (Serum C...
medmcqa
medmcqa_05_04941
Nuclear and cytoplasmic changes in the apoptotic cells is due to
[ "Oxygen free radicals", "Caspases", "Complement fixation", "ATP ases" ]
B
(Caspases): (19, 189 Robbins 9th edition)Activation and Function of Caspases* The mitochondrial and death receptor pathway lead to the activation of the initiator caspases, caspase 9 and - 8, respectively. Active forms of these enzymes are produced and these cleave and thereby activate another series of caspases that a...
math_qa
mathqa_03_02883
the difference between the squares of two consecutive numbers is 35 . the numbers are
[ "14,15", "15,16", "17,18", "18,19" ]
C
"explanation : let the numbers be a and ( a + 1 ) ( a + 1 ) 2 − a 2 = 35 ⇒ a 2 + 2 a + 1 − a 2 = 35 ⇒ 2 a = 34 ⇒ 2 a = 34 or a = 17 the numbers are 17 & 18 . correct option : c"
sciq
sciq_01_11552
What type of tissues are major barriers to the entry of pathogens into the body?
[ "mucosal", "nasal", "skin", "vascular" ]
A
The Mucosal Immune Response Mucosal tissues are major barriers to the entry of pathogens into the body. The IgA (and sometimes IgM) antibodies in mucus and other secretions can bind to the pathogen, and in the cases of many viruses and bacteria, neutralize them. Neutralization is the process of coating a pathogen with ...
sciq
sciq_01_07644
Does the force of magnetism increase or decrease as the distance between objects increases?
[ "increase", "fluctuate", "remain stable", "decrease" ]
D
openbookqa
obqa_02_02529
You are shivering and see flurries; you remember that you are in the Northern Hemisphere. What day is it most likely?
[ "the autumnal equinox", "the vernal equinox", "the summer solstice", "the winter solstice" ]
D
the winter solstice is on December 21st in the northern hemisphere
ARC-Easy
arc_04_00964
Gasoline for cars is produced from fossil fuels. Using gasoline can most likely lead to which environmental problem?
[ "soil erosion", "water pollution", "wildlife extinction", "global warming" ]
D
null
openbookqa
obqa_02_02173
The volume of water in a pond could increase if
[ "the water drains out of the pond", "a large flock of ducks visits the pond", "people swim in the pond", "there is stormy weather" ]
D
storms cause bodies of water to increase amount of water they contain
math_qa
mathqa_03_02427
how many zeros are there in 50 !
[ "10", "11", "12", "13" ]
C
"to find the number of trailing zeroes in 50 ! factorial we must find the number of integral values in : 50 / 5 + 50 / 5 ^ 2 + 50 / 5 ^ 3 + . . . . . . . . . = 10 + 2 + 0 + 0 . . . . = 12 answer : c"
math_qa
mathqa_03_01467
a parking garage rents parking spaces for $ 15 per week or $ 30 per month . how much does a person save in a year by renting by the month rather than by the week ?
[ "$ 140", "$ 160", "$ 220", "$ 420" ]
D
"10 $ per week ! an year has 52 weeks . annual charges per year = 52 * 15 = 780 $ 30 $ per month ! an year has 12 months . annual charges per year = 12 * 30 = 360 $ 780 - 360 = 420 ans d"
math_qa
mathqa_03_03783
ages of two persons differ by 16 years . if 6 year ago , the elder one be 3 times as old the younger one , find their present age
[ "12,28", "14,30", "16,32", "18,34" ]
B
"explanation : let the age of younger person is x , then elder person age is ( x + 16 ) = > 3 ( x - 6 ) = ( x + 16 - 6 ) [ 6 years before ] = > 3 x - 18 = x + 10 = > x = 14 . so other person age is x + 16 = 30 answer : option b"
openbookqa
obqa_02_03010
Nerves all have
[ "microscopic parts", "short arms", "viable organs", "liver transplants" ]
A
nerves are made of nerve cells
medmcqa
medmcqa_05_02912
Mikulicz cell and Russell bodies are seen in
[ "Rhinoscleroma", "Rhinophyma", "Rhinosporidiosis", "Plasma cell disorder" ]
A
Granulomatous disease of the nose BacterialFungalUnspecified causeRhinoscleroma Syphilis TuberculosisLupusLeprosy RhinosporidiosisAspergillosis Mucormycosis CandidiasisHistoplasmosis Blastomycosis Wegner's granulomatosisNon healing midline granuloma Sarcoidosis Churg Strauss syndrome RhinoscleromaAgent - Klebsiella rhi...
sciq
sciq_01_00282
How is oxygen transferred into the bloodstream?
[ "simple diffusion", "mean diffusion", "hard diffusion", "brain diffusion" ]
A
The oxygen enters the bloodstream from the alveoli , tiny sacs in the lungs where gas exchange takes place ( Figure below ). The transfer of oxygen into the blood is through simple diffusion.
sciq
sciq_01_02175
What type of energy does chemosynthesis use to make food?
[ "GRAVITATIONAL energy", "chemical energy", "CHEMICAL energy", "carbon energy" ]
B
Some bacterial autotrophs make food using chemosynthesis. This process uses chemical energy instead of light energy to produce food.
medmcqa
medmcqa_05_02925
The most sensitive among the following tests for diagnosis of malaria is -
[ "Thin peripheral blood smear", "Quantitative buffy coat test", "PfHRP2 antigen", "Pan plasmodial LDH" ]
B
Investigations Giemsa-stained thick and thin blood films should be examined whenever malaria is suspected. In the thick film, erythrocytes are lysed, releasing all blood stages of the parasite. This, as well as the fact that more blood is used in thick films, facilitates the diagnosis of low-level parasitaemia. A thin ...
medmcqa
medmcqa_05_00903
Which extrapyramidal tract act along with lateral spinothalamic tract?
[ "Reticulospinal tract", "Rubrospinal tract", "Tectospinal tract", "Vestibulospinal tract" ]
B
Ans. b Rubrospinal tract[Rpf Genong 2n/e P' 241)Descending tracts concerned with distal muscles of the limb those muscles which mediate fine skilled movements) occupy lateral white column and are called lateral pathways, Lateral pathways include lateral coicospinal tract and rubrospinal tracts.
ARC-Challenge
arc_04_02952
Which factors can have the greatest effect on the health of a river system?
[ "type of soil and salinity", "nitrate levels and turbidity", "human consumption and pH", "natural disasters and tidal changes" ]
B
null