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medmcqa
medmcqa_05_00868
A physician, after examining a group of patients of a ceain disease, classifies the condition of each one as 'Normal', 'Mild', 'Moderate' or 'Severe'. Which one of the following is the scale of measurement that is being adopted for classification of the disease condition?
[ "Normal", "Interval", "Ration", "Ordinal" ]
D
In the given question, a physician, after examining a group of patients of a ceain disease, classifies the condition of each one as 'Normal', 'Mild', 'Moderate' or 'Severe'. 'Normal-mild-moderate-severe' is a continuum of outcome for a variable, thus is measured on an Ordinal scale.
math_qa
mathqa_03_01631
what is the remainder when 1201 × 1202 × 1205 × 1210 is divided by 6 ?
[ "1", "2", "3", "4" ]
D
"the remainders when dividing each number by six are : 1 , 2 , 5 , and 4 . the product is 1 * 2 * 5 * 4 = 40 the remainder when dividing 40 by 6 is 4 . the answer is d ."
openbookqa
obqa_02_04051
which of these is the primary source of light of our planet?
[ "the cluster of Orion stars", "the moon which orbits earth", "the closest star to us", "the meteorites flying by" ]
C
the sun is a source of light called sunlight
sciq
sciq_01_09126
Over time, deposited sediments may harden into what?
[ "fossils", "coral", "rocks", "deltas" ]
C
Over time, deposited sediments may harden into rock. First, the sediments are compacted . That is, they are squeezed together by the weight of sediments on top of them. Next, the sediments are cemented together. Minerals fill in the spaces between the loose sediment particles. These cementing minerals come from the wat...
sciq
sciq_01_01453
What do rocket-based systems use to propel itself into space?
[ "hydrogen reactions", "water reactions", "nuclear reactions", "chemical reactions" ]
D
The space shuttle—and any other rocket-based system—uses chemical reactions to propel itself into space and maneuver itself when it gets into orbit. The rockets that lift the orbiter are of two different types. The three main engines are powered by reacting liquid hydrogen with liquid oxygen to generate water. Then the...
medmcqa
medmcqa_05_00658
A 55 Yr old smoker presents with history of 5 episodes of macroscopic hematuria each lasting for about 4-5 days in the past 5 yrs. Which of the following investigations should be performed to evaluate the suspected cause
[ "Urine microscopy and cytology", "X-Ray KUB", "US KUB", "DTPA scan" ]
A
.
openbookqa
obqa_02_03300
What is used to record images?
[ "sunlight", "calculators", "nikon devices", "camera batteries" ]
C
a camera is used for recording images
math_qa
mathqa_03_02135
donovan and michael are racing around a circular 500 - meter track . if donovan runs each lap in 45 seconds and michael runs each lap in 40 seconds , how many laps will michael have to complete in order to pass donovan , assuming they start at the same time ?
[ "9", "10", "11", "12" ]
A
"one way of approaching this question is by relative speed method 1 . speed / rate of donovan = distance / time = > 500 / 45 = > 100 / 9 2 . speed / rate of michael = distance / time = > 500 / 40 = > 50 / 4 relative speed between them = 50 / 4 - 100 / 9 = > 25 / 36 ( we subtract the rates if moving in the same directio...
medmcqa
medmcqa_05_00248
The electrostatic precipitator are used in the prevention of -
[ "Radiation risks", "Air pollution emissions", "Mosquito nuisance", "Diffuse vibrations" ]
B
An electrostatic precipitator (ESP) is a filtration device that removes fine paicles, like dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit. In contrast to wet scrubbers, which apply energy directly to the flowing fluid medium, a...
sciq
sciq_01_07459
What kind of hormones are secreted by organs classified as gonads?
[ "anterior hormones", "cortisol hormones", "growth hormones", "sex hormones" ]
D
The gonads secrete sex hormones. The male gonads are called testes. They secrete the male sex hormone testosterone. The female gonads are called ovaries. They secrete the female sex hormone estrogen. Sex hormones are involved in the changes of puberty. They also control the production of gametes by the gonads.
math_qa
mathqa_03_04417
a and b invests rs . 3000 and rs . 8000 respectively in a business . if a doubles his capital after 6 months . in what ratio should a and b divide that year ' s profit ?
[ "9 : 6", "9 : 8", "9 : 16", "9 : 9" ]
C
"( 3 * 6 + 6 * 6 ) : ( 8 * 12 ) 54 : 96 = > 9 : 16 . answer : c"
sciq
sciq_01_10561
What system consists of structures that produce eggs, secrete female sex hormones, and ultimately enable birth of a fetus?
[ "male reproductive system", "female uterus system", "female hormone system", "female reproductive system" ]
D
The female reproductive system consists of structures that produce eggs and secrete female sex hormones. They also provide a site for fertilization and enable the development and birth of a fetus.
ARC-Challenge
arc_04_02464
Which of the following is an example of a chemical change?
[ "clouds forming", "sugar dissolving", "water freezing", "a candle burning" ]
D
null
sciq
sciq_01_10618
The yellowstone hot spot is a famous example of a what?
[ "form hot spot", "deeper hot spot", "oceanic hot spot", "continental hot spot" ]
D
Hot spots are found within continents, but not as commonly as within oceans. The Yellowstone hot spot is a famous example of a continental hot spot.
math_qa
mathqa_03_04699
find the cost of fencing around a circular field of diameter 42 m at the rate of rs . 5 a meter ?
[ "655.9", "659.75", "650.57", "655.9" ]
B
"2 * 22 / 7 * 14 = 131.95 131.95 * 5 = rs . 659.75 answer : b"
sciq
sciq_01_01848
Turbulent sounds, at the onset of blood flow when the cuff pressure becomes sufficiently small are called?
[ "pinworm sounds", "korotkoff sounds", "whooping sounds", "choanocyte sounds" ]
B
12.5 The Onset of Turbulence Sometimes we can predict if flow will be laminar or turbulent. We know that flow in a very smooth tube or around a smooth, streamlined object will be laminar at low velocity. We also know that at high velocity, even flow in a smooth tube or around a smooth object will experience turbulence....
medmcqa
medmcqa_05_01207
Which of the following is the most common initial site of metastasis from a primary BCC?
[ "Lungs", "Regional lymph nodes", "Bone", "Liver" ]
B
Ans. B. Regional lymph nodesThe metastatic potential of BCC is very low with rates ranging from 0.0028to0.1%, The head and neck region is the most frequent location of the primary tumor with regional lymph nodes being the most common site of metastasis. The lungs, bone, liver, and pleural are also potential sites of me...
openbookqa
obqa_02_00467
An example of breaking down is
[ "cutting an apple into slices", "putting a jigsaw puzzle together", "mixing cake ingredients together", "applying coats of paint onto a wall" ]
A
break down means change from a whole into pieces
math_qa
mathqa_03_03530
a number when divided by 342 gives a remainder 47 . when the same number if it divided by 19 , what would be the remainder ?
[ "1", "2", "5", "9" ]
D
"on dividing the given number by 342 , let k be the quotient and 47 as remainder . then , number – 342 k + 47 = ( 19 x 18 k + 19 x 2 + 9 ) = 19 ( 18 k + 2 ) + 9 .  the given number when divided by 19 , gives ( 18 k + 2 ) as quotient and 9 as remainder . answer d"
medmcqa
medmcqa_05_03215
Urinary retention in child is most commonly caused by
[ "Metal scab with ulceration", "Posturethral valve", "Urethral stricture", "Epispadius" ]
A
(A) Metal scab with ulceration # Acute urinary retention in a male child may be due to local inflammatory causes like meatal ulcer with scabbing.> Etiology of Urinary Retention in Children: Neurological processes Severe voiding dysfunction UTI Constipation Adverse drug effect Local inflammatory causes Locally invading ...
medmcqa
medmcqa_05_01247
Which of the following is the most common cause of persistent trophoblastic disease after H. Mole evacuation?
[ "Choriocarcinoma", "Invasive mole", "Placental site trophoblastic tumor", "Residual Mole" ]
D
Ans. D. Residual MoleUpto 20% of women with H. Mole show persistence of tumor in uterus following surgical evacuation.a. 15% persist as persistant or residual mole.b. 5% develop choriocarcinoma.c. Trophoblastic tumors diagnosed for upto 6 months following an abortion or mole is often. An invasive mole, but the one diag...
sciq
sciq_01_03377
Not all cells of a leaf carry out photosynthesis. cells within the middle layer of a leaf have chloroplasts, which contain the photosynthetic what?
[ "structure", "apparatus", "pipes", "wires" ]
B
Figure 5.7 Not all cells of a leaf carry out photosynthesis. Cells within the middle layer of a leaf have chloroplasts, which contain the photosynthetic apparatus. (credit "leaf": modification of work by Cory Zanker).
sciq
sciq_01_05676
Where do the majority of arthropods live?
[ "in air", "in hives", "on land", "in water" ]
C
The majority of mollusks and annelids live in the water or inside hosts. Arthropods are invertebrates that include insects. The majority of arthropods live on land.
ARC-Challenge
arc_04_02360
When a blue light is shone on a yellow banana, what color does the banana appear to be?
[ "blue", "yellow", "green", "black" ]
D
null
sciq
sciq_01_04155
Converging plates can be oceanic, continental, or one of each. if at least one is oceanic, it will subduct. a subducting plate creates what?
[ "volcanoes", "earthquakes", "wind", "fires" ]
A
Converging plates can be oceanic, continental, or one of each. If at least one is oceanic, it will subduct. A subducting plate creates volcanoes. Many of the world's volcanoes are the result of subduction at a convergent plate boundary. A map of the world's active volcanoes is pictured below ( Figure below ).
sciq
sciq_01_10314
What is our largest source of energy?
[ "iron", "coal", "wind", "methane" ]
B
Coal is our largest source of energy for producing electricity.
medmcqa
medmcqa_05_04171
Most common joint involved in Gout y ahritis is ?
[ "Knee joint", "Hip joint", "MP joint of the big toe", "MP joint of thumb" ]
C
Gout: Disturbed purine metabolism leading to ecxessive accumulation of uric acid in the blood -an inherited disorder ;or impaired excretion of uric acid by kidneys.result is accumulation of sodium bicarbonte crystals in soft tissues.Tisues of predliction are cailages,tendon ,bursa. Patient ,beyond 40 years of age, pres...
openbookqa
obqa_02_00675
A pod of dolphins is swimming while searching for food. The youngest dolphin swims away from the pod and is lost. The rest of the pod searches for the young dolphin by clicking into the water. The young dolphin is found because of
[ "echoes from noise", "vibrations from drums", "sound of water", "movement in air" ]
A
echolocation is when some animals detect objects by hearing echoes by emitting sound
medmcqa
medmcqa_05_04484
Paradoxical splitting of second hea sound is seen in-
[ "RBBB", "ASD", "LBBB", "VSD" ]
C
A split S2 is a finding upon auscultation of the S2 hea sound. It is caused when the closure of the aoic valve (A2) and the closure of the pulmonary valve (P2) are not synchronized during inspiration. The second hea sound (S2) is caused by the closure of the aoic and pulmonic valves, which causes vibration of the valve...
math_qa
mathqa_03_02054
what is the remainder when 9 ^ 1 + 9 ^ 2 + 9 ^ 3 + . . . + 9 ^ 9 is divided by 9 ?
[ "2", "3", "0", "5" ]
C
"notice that in the brackets we have the sum of 9 odd multiples of 9 , which yields remainder of 0 upon division by 9 . answer : c"
ARC-Easy
arc_04_00666
Humans cannot survive without clean, fresh water. Reservoirs of liquid water vary, but all water spends time as a gas in the atmosphere. What is the source of most of the water in the atmosphere?
[ "lakes", "oceans", "rivers", "glaciers" ]
B
null
openbookqa
obqa_02_03897
After a whiteout you need to
[ "remove snow", "login to Warcraft", "wish for snow", "apply suntan lotion" ]
A
snowy means a large amount of snow
sciq
sciq_01_02356
What is the name for the study of the plants and animals that live in fresh water bodies ?
[ "oceanography", "nematology", "limnology", "hydrology" ]
C
Limnology is the study of the plants and animals that live in fresh water bodies. A lake has zones just like the ocean. The ecosystem of a lake is divided into three distinct zones ( Figure below ):.
medmcqa
medmcqa_05_04989
Ibuprofen acts on:
[ "Lipoxygenase pathway", "Cyclooxygenase pathway", "Kinin system", "Serotonin system" ]
B
Ibuprofen is an NSAID - So acts on COX pathway ESSENTIALS OF MEDICAL PHARMACOLOGY;7TH EDITION;KD TRIPATHI;PAGE NO 193
openbookqa
obqa_02_00781
Sea anemones
[ "look like flora", "look like cars", "look like bats", "look like dogs" ]
A
poisonous darts are used for defense by sea anemones
math_qa
mathqa_03_02501
a barrel full of beer has 2 taps one midway , , which draw a litre in 6 minutes and the other at the bottom , which draws a litre in 4 minutes . the lower tap is lower normally used after the level of beer in the barrel is lower than midway . the capacity of the barrel is 36 litres . a new assistant opens the lower tap...
[ "15 minutes", "16 minutes", "17 minutes", "18 minutes" ]
B
sol . the top tab is operational till 18 litres is drawn out . ∴ time after which the lower tap is usually open = 18 × 6 = 108 minutes ∴ time after which it is open now = 108 – 24 = 84 minutes ∴ litres drawn = 84 / 6 = 14 litres ∴ 18 – 14 = 4 litres were drawn by the new assistant . ∴ time = 4 × 4 = 16 minutes answer b
sciq
sciq_01_01442
What is defined as an organism in the earliest stages of development?
[ "an embryo", "a zygote", "a gamete", "an nucleus" ]
A
An embryo is an organism in the earliest stages of development. Embryos of different species may look quite similar, even when the adult forms look very different. Look at the drawings of embryos in Figure below . They represent very early life stages of a chicken, turtle, pig, and human being. The embryos look so simi...
sciq
sciq_01_09361
Similar to the coil on a stove, changes in what reflect an increase in the temperature of a star?
[ "rotation", "color", "direction", "texture" ]
B
Think about the coil of an electric stove as it heats up. The coil changes in color as its temperature rises. When you first turn on the heat, the coil looks black. The air a few inches above the coil begins to feel warm. As the coil gets hotter, it starts to glow a dull red. As it gets even hotter, it becomes a bright...
medmcqa
medmcqa_05_04444
Steroid resistant nephritic syndrome ?
[ "Nephrin", "Alpha-actinin-4", "Podocin", "Transient Receptor Potential 6" ]
C
Podocin The glomerular capillary wall is a filtering membrane and consists of the following structures i) Endothelial cells ii) Glomerular basement membrane iii) Visceral epithelial cells (podocytes) iv) Mesangial cells The visceral epithelial cell known as podocyte is impoant for the maintenance of glomerular barrier ...
sciq
sciq_01_08798
What do you call the sudden flow of mud down a slope because of gravity?
[ "typhoon", "mountainside", "rockflow", "mudslide" ]
D
A mudslide is the sudden flow of mud down a slope because of gravity. Mudslides occur where the soil is mostly clay. Like landslides, mudslides usually occur when the soil is wet. Wet clay forms very slippery mud that slides easily. You can see an example of a mudslide in Figure below .
sciq
sciq_01_03776
In general, objects expand in all directions as temperature does what?
[ "increases", "decreases", "stays the same", "cycles" ]
A
Figure 13.11 In general, objects expand in all directions as temperature increases. In these drawings, the original boundaries of the objects are shown with solid lines, and the expanded boundaries with dashed lines. (a) Area increases because both length and width increase. The area of a circular plug also increases. ...
sciq
sciq_01_07162
What are electrons at the outermost energy level of an atom are called?
[ "valence electrons", "shell electrons", "core electrons", "ions" ]
A
Electrons at the outermost energy level of an atom are called valence electrons. They determine many of the properties of an element. That’s because these electrons are involved in chemical reactions with other atoms. Atoms may share or transfer valence electrons. Shared electrons bind atoms together to form chemical c...
math_qa
mathqa_03_01245
in the xy - coordinate system , what is the slope of the line that goes through point ( 2 , 4 ) and is equidistant from the two points p = ( 9 , 3 ) and q = ( 5 , 9 ) ?
[ "0.1", "0.2", "0.3", "0.4" ]
D
"first , get the middle coordinate between ( 9,3 ) and ( 5,9 ) . x = 9 + ( 5 - 9 ) / 2 = 7 y = 3 + ( 9 - 3 ) / 2 = 6 second , get the slope of ( 7,6 ) and ( 2,4 ) . m = 6 - 4 / 7 - 2 = 2 / 5 = 0.4 answer : d"
sciq
sciq_01_08158
Which theory suggests plant species richness increases with island size?
[ "island equilibrium model", "island symbolic model", "island biology model", "island ecosystem model" ]
A
medmcqa
medmcqa_05_00239
Most potent cerebral vasodilator is
[ "B blocker", "Nitro-glycerine", "Hyper carbia", "Nitroprusside" ]
C
C i.e. Hyper carbia
sciq
sciq_01_09508
Researchers have long based their hypotheses about animal phylogeny on what?
[ "distinctive data", "longitudinal data", "manipulative data", "morphological data" ]
D
sciq
sciq_01_04092
The head, thorax, and abdomen comprise what type of body structure, possessed by arthropods?
[ "permeable", "segmented", "elongated", "vertebrate" ]
B
Arthropods range in length from about 1 millimeter (0.04 inches) to 4 meters (about 13 feet). They have a segmented body with a hard exoskeleton. They also have jointed appendages. The body segments are the head, thorax, and abdomen (see Figure below ). In some arthropods, the head and thorax are joined together as a c...
medmcqa
medmcqa_05_00785
In sickle cell anemia replacement is:
[ "Valbglu in b6", "Glu by val in b6", "Hist val b8", "6A" ]
B
B i.e. Glu by val in b6
sciq
sciq_01_04115
What term means the abnormal or excessive extension of a joint - particularly a hinged joint - beyond its normal range of motion, thus resulting in injury?
[ "tear", "hyperextension", "sprain", "hypercorrection" ]
B
These include anterior-posterior movements of the arm at the shoulder, the forearm at the elbow, the hand at the wrist, and the fingers at the metacarpophalangeal and interphalangeal joints. For the thumb, extension moves the thumb away from the palm of the hand, within the same plane as the palm, while flexion brings ...
openbookqa
obqa_02_00568
A common problem involving waste in the excretory system is
[ "run for it", "running on empty", "running a fever", "having the runs" ]
D
the excretory system removes waste from the body
medmcqa
medmcqa_05_00069
Which of the following is seen in African children with Burkitts lymphoma?
[ "Absence of EBV", "T cell neoplasia", "Deletion of C myc gene", "Chromosome 8q24 to chromosome 14q32 translocation" ]
D
Ans. is 'd'The c-myc gene (chromosome 8q24) involved in the entry of cells from resting G0 into the cell cycle is translocated to the mu heavy chain gene (chromosome 14q32) in most cases of Burkitt's lymphoma studied.
medmcqa
medmcqa_05_02377
IgM have how many four-peptide subunits: March 2010
[ "3", "4", "5", "6" ]
C
IgM molecules are polymers of five four-peptide subunits. In the pentameric form all heavy chains are identical and all light chains are identical. It has another protein covalently bound a S-S bond called the J chain. This chain functions in polymerization of the molecule into a pentamer
medmcqa
medmcqa_05_04045
Which of the following is a virulence factor for streptococci?
[ "Hemolysin", "M protein", "Hyaluridase", "Carbohydrate" ]
B
The cell wall antigens include capsular polysaccharide (C-substance), peptidoglycan and lipoteichoic acid (LTA), R and T proteins, and various surface proteins, including M protein, fimbrial proteins, fibronectin-binding proteins (eg, protein F), and cell-bound streptokinase. The C-substance may have a role in increase...
medmcqa
medmcqa_05_03747
Commonest type of necrosis is
[ "Fatty", "Caseous", "Coagulative", "Liquifactive" ]
C
Ans. c (Coagulative). (Ref. Robbins, Pathologic Basis of Disease, 8th/pg.7-13)Caseation necrosis - Tubercular lymph nodesCoagulative necrosis - Myocardial infarction, sarcoidosisLiquefactive necrosis - Brain infarcts and infections (abscess).TYPE OF NECROSISCOMMMENTSCoagulative necrosis- is a form of tissue necrosis in...
ARC-Easy
arc_04_01696
When you are riding a bicycle at night, your bicycle's reflectors help people in cars see your bicycle. How do bicycle reflectors work?
[ "They are made of a special material that gives off its own light.", "They are hooked up to batteries that allow them to produce light.", "They bounce light back from other sources.", "They are covered with paint that glows in the dark." ]
C
null
math_qa
mathqa_03_00272
doughnuts , cookies and muffins in a pastry shop are in the ratio of 5 : 3 : 1 . if there are 50 doughnuts , the number of muffins in the shop is : .
[ "25", "30", "10", "15" ]
C
explanation : let doughnuts = 5 x , cookies = 3 x & muffins = 1 x . now , 5 x = 50 hence x = 10 . number of muffins = 1 x which is 10 . answer : c
medmcqa
medmcqa_05_00860
Bibasilar velcro crackles occur in
[ "Acute pulmonary edema", "Acute bronchopneumonia", "Pulmonary fibrosis", "Pulmonary embolism" ]
C
Idiopathic pulmonary fibrosis is defined as a progressive fibrosing interstitial pneumonia of unknown etiology,occurring in adults.With the advent of widespread CT scanning,it may present as an incidental finding in an otherwise asymptomatic individual, but more typically presents with progressive breathlessness(which ...
sciq
sciq_01_05062
Within the chloroplast, synthesis of what takes place in the fluid inside the inner membrane called the stroma?
[ "glucose", "sugar", "wheat", "fructose" ]
B
Figure 4.17 The chloroplast has an outer membrane, an inner membrane, and membrane structures called thylakoids that are stacked into grana. The space inside the thylakoid membranes is called the thylakoid space. The light harvesting reactions take place in the thylakoid membranes, and the synthesis of sugar takes plac...
openbookqa
obqa_02_03012
Grow lamps provide artificial sun to
[ "bricks", "dogs", "succulents", "fish" ]
C
a plant light is used for help plants by mimicking sunlight
sciq
sciq_01_10280
All photosynthetic organisms contain a pigment called what?
[ "sodium", "chlorophyll", "carbonate", "Fiber" ]
B
Understanding Pigments Different kinds of pigments exist, and each absorbs only certain wavelengths (colors) of visible light. Pigments reflect the color of the wavelengths that they cannot absorb. All photosynthetic organisms contain a pigment called chlorophyll a, which humans see as the common green color associated...
medmcqa
medmcqa_05_01242
Most common brain tumour is-
[ "Astrocytoma", "Meningioma", "Metastasis", "Oligodendroma" ]
C
Ans. is 'c' i.e., Metastasis o MC brain tumors-Metastaseso MC primary brain tumor-Gliomao MC Glioma-Astrocytomaso MC Astrocytomas-Glioblastoma multiforme
openbookqa
obqa_02_01844
A mechanical device requires 420 J of work to do 230 J of work in lifting a crate. What is the efficiency of the device?
[ "65%", "50%", "60%", "55%" ]
D
a simple machine requires mechanical energy to function
math_qa
mathqa_03_02818
to fill a tank , 20 buckets of water is required . how many buckets of water will be required to fill the same tank if the capacity of the bucket is reduced to one - fifth of its present ?
[ "100", "200", "300", "400" ]
A
"let the capacity of 1 bucket = x . then , the capacity of tank = 20 x . new capacity of bucket = 1 / 5 x therefore , required number of buckets = ( 20 x ) / ( 1 x / 5 ) = ( 20 x ) x 5 / 1 x = 100 / 1 = 100 answer is a ."
openbookqa
obqa_02_04256
See evaporation in action by
[ "leaving two mason jars out with different levels of gatorade", "run for city council", "take a walk on the sun", "become a human bug" ]
A
evaporation causes amount of water to decrease
sciq
sciq_01_00613
What mammalian class has the greatest ability to learn?
[ "reptiles", "humans", "apes", "rats" ]
B
In many ways, humans are unique among mammals. For example, we have bigger brains and a greater ability to learn than any other species in the mammalian class. In many ways, however, we are typical of the mammalian order to which we belong. That order is the Primate Order. To fully understand what it means to be human,...
sciq
sciq_01_11420
What do monarch butterfly larvae depend on for their food?
[ "seaweed", "pollen", "milkweeds", "honey" ]
C
Another concern about biotechnology is how it may affect the environment. Negative effects on the environment have already occurred because of some GMOs. For example, corn has been created that has a gene for a pesticide. The corn plants have accidentally cross-pollinated nearby milkweeds. Monarch butterfly larvae depe...
sciq
sciq_01_02612
What does the kinetic-molecular theory describe the behavior of?
[ "a liquid", "a solid", "an ideal gas", "a compound" ]
C
The kinetic-molecular theory describes the behavior of an ideal gas.
math_qa
mathqa_03_01535
if a square mirror has a 20 - inch diagonal , what is the approximate perimeter q of the mirror , in inches ?
[ "40", "60", "80", "100" ]
B
"if you draw the square and diagonal inside the square . u can see square becomes part of two triangles opposite to each other . and we know the property of the triangle , addition of two sides of triangle must be greater than its diagonal in order to complete the triangle . and each side must be less than 20 and perim...
openbookqa
obqa_02_01870
A dart frog is eaten by a pelican, who promptly
[ "passes away", "wakes up", "eats birds", "flies home" ]
A
poison causes harm to living things
ARC-Challenge
arc_04_02472
Two pieces of the same metal are placed on a table. The pieces of metal have the same density, mass, and texture. Which characteristic must be the ONLY difference between the two samples?
[ "They have different dimensions.", "They have different boiling points.", "They are made up of a different type of matter.", "They contain a different amount of matter per unit volume." ]
A
null
ARC-Challenge
arc_04_02530
The temperature of water in a glass changes from 5°C to -1°C. How will the water most likely change?
[ "It will boil.", "It will melt.", "It will freeze.", "It will condense." ]
C
null
sciq
sciq_01_09003
What function does a vacuole do for a cell?
[ "storage", "transfer", "division", "reproduction" ]
A
Most mature plant cells have a central vacuole that occupies more than 30% of the cell's volume. The central vacuole can occupy as much as 90% of the volume of certain cells. The central vacuole is surrounded by a membrane called the tonoplast . The central vacuole has many functions. Aside from storage, the main role ...
sciq
sciq_01_00023
Which muscles allow your fingers to also make precise movements for actions?
[ "paired muscles", "motoric muscles", "intrinsic muscles", "fine movement muscles" ]
C
Intrinsic Muscles of the Hand The intrinsic muscles of the hand both originate and insert within it (Figure 11.28). These muscles allow your fingers to also make precise movements for actions, such as typing or writing. These muscles are divided into three groups. The thenar muscles are on the radial aspect of the palm...
sciq
sciq_01_00410
Which part of the wave helps make the wave bend and cause refraction?
[ "shallow part", "heavy part", "bright part", "dense part" ]
A
Lymph that collects in tissues slowly passes into tiny lymph vessels. Lymph then travels from smaller to larger lymph vessels. Muscles around the lymph vessels contract and squeeze the lymph through the vessels. The lymph vessels also contract to help move the lymph along. Eventually, lymph reaches the main lymph vesse...
openbookqa
obqa_02_00427
Melissa is creating a new product to quench people's thirst. She thinks it will be more popular if it is less flat. She decides to
[ "add more salt to the drink", "add some dissolved carbon dioxide", "shake up the drink bottles before shipping them to the stores", "boil the drink in a large vat" ]
B
a carbonated beverage contains dissolved carbon dioxide
sciq
sciq_01_05740
What are invertebrate chordates that retain all four defining chordate traits as adults called?
[ "lancelets", "vertebrates", "tunicates", "sporozoans" ]
A
Lancelets are invertebrate chordates that retain all four defining chordate traits as adults. There are only about 25 species of living lancelets. Lancelets resemble tunicates in several ways. For example:.
sciq
sciq_01_01724
Covering about 16 percent of the moon's surface, maria are dark, solid, flat areas consisting of what substance?
[ "ash", "lava", "dust", "debris" ]
B
When you look at the Moon from Earth, you notice dark and light areas. The maria are dark, solid, flat areas of lava. Maria covers around 16% of the Moon’s surface, mostly on the near side. The maria formed about 3.0 to 3.5 billion years ago, when the Moon was continually bombarded by meteorites ( Figure below ). Large...
openbookqa
obqa_02_03945
Conserving water can be used for survival where?
[ "seas", "oceans", "sandy land", "towns" ]
C
conserving water can be used for survival in a dry environment
sciq
sciq_01_01398
Fungi cause three different types of human illness: poisonings, parasitic infections, and what?
[ "diabetes", "heart disease", "allergies", "diarrhea" ]
C
Fungi cause three different types of human illness: poisonings, parasitic infections, and allergies. Many poisonous mushrooms are eaten by mistake because they look like edible mushrooms. Parasitic yeasts cause candidiasis, ringworm, and athlete’s foot. Mold allergies are very common.
openbookqa
obqa_02_00207
The water in the bowl was gone before the water
[ "on the tray", "in the mug", "on the plate", "on the table" ]
B
as the surface area of a body of water increases , evaporation of that body of water will increase
medmcqa
medmcqa_05_02129
Group B nerve fibres are situated in
[ "Muscle spindles", "Fibres carrying pain sensation", "Preganglionic autonomic fibres", "Post ganglionic autonomic fibres" ]
C
Types of nerve fibers fibers are fast fibers. -        Aα- Somatic motor to extrafusal fibers of muscle spindle, proprioception -        Aβ- Kinesthetic, pressure and touch -        Aγ- Motor to intrafusal fibers of muscle spindle -        Aδ-  Pain, temperature, touch and pressure -        B fibers- Autonomic pregangl...
sciq
sciq_01_04374
The theory of evolution by what (and other processes) explains both the diversity of organisms and how populations of organisms change over time?
[ "natural evolution", "genocide", "characteristic selection", "natural selection" ]
D
Biology has only a few over arching theories. One of these, the Cell Theory of Life, explains the historic continuity of organisms, while the Theory of Evolution by Natural Selection (and other processes), explains both the diversity of organisms and how populations of organisms change over time. Finally, the Physicoch...
sciq
sciq_01_08385
What are most metal objects made of?
[ "tin", "aluminum", "metal alloys", "bronze" ]
C
Most metal objects are made of metal alloys rather than pure metals.
math_qa
mathqa_03_02639
each day a man meets his wife at the train station after work , and then she drives him home . she always arrives exactly on time to pick him up . one day he catches an earlier train and arrives at the station an hour early . he immediately begins walking home along the same route the wife drives . eventually his wife ...
[ "45 minutes", "50 minutes", "40 minutes", "54 minutes" ]
D
"as they arrived 12 minutes earlier than usual , they saved 12 minutes on round trip from home to station ( home - station - home ) - - > 6 minutes in each direction ( home - station ) - - > wife meets husband 6 minutes earlier the usual meeting time - - > husband arrived an hour earlier the usual meeting time , so he ...
openbookqa
obqa_02_02125
Which is least likely to make a tasty meal for a predator?
[ "a rabbit", "a deer", "a skunk", "a baby moose" ]
C
a skunk produces a bad odor
openbookqa
obqa_02_03779
Who is likely to receive its coloration and hairy body from its parents?
[ "Peter the Parakeet", "Valentina the Vole", "Terry the Tuna", "Greta the Grouper" ]
B
the coloration of fur is an inherited characteristic
ARC-Easy
arc_04_00451
Which of the following climates has cold winters and hot summers?
[ "polar", "subtropical", "temperate", "tropical" ]
C
null
sciq
sciq_01_05629
What kind of anaerobe is yeast?
[ "facultative", "aerobic", "obligate", "mutualistic" ]
A
Yeast is a facultative anaerobe. This means that alcohol fermentation takes place only if: a. the temperature is close to 37°C b. the atmosphere does not contain oxygen c. sugar is provided to the cells d. light is provided to the cells.
sciq
sciq_01_07059
What cellular structure moves molecules between locations inside the cell?
[ "capillaries", "transport vesicles", "dna vesicles", "transport vessels" ]
B
Transport vesicles are able to move molecules between locations inside the cell. For example, transport vesicles move proteins from the rough endoplasmic reticulum to the Golgi apparatus.
sciq
sciq_01_01344
Skeletal muscles are attached to bones by what?
[ "enzymes", "tendons", "plasma", "veins" ]
B
Skeletal muscles are attached to bones by tendons.
math_qa
mathqa_03_01725
reduce 368 / 598 to the lowest terms
[ "30 / 25", "28 / 13", "28 / 29", "8 / 13" ]
D
explanation : we can do it easily by in two steps step 1 : we get the hcf of 368 and 598 which is 46 step 2 : divide both by 46 , we will get the answer 8 / 13 answer : option d
sciq
sciq_01_04068
What is an upward force that fluids exert on any object that is placed in them?
[ "warm force", "efficient force", "gravity force", "buoyant force" ]
D
Buoyant force is an upward force that fluids exert on any object that is placed in them. The ability of fluids to exert this force is called buoyancy . What explains buoyant force? A fluid exerts pressure in all directions, but the pressure is greater at greater depth. Therefore, the fluid below an object, where the fl...
sciq
sciq_01_05737
What is the term for force that opposes motion between any touching surfaces?
[ "tension", "stress", "friction", "gravity" ]
C
All machines make work easier, but they don’t increase the amount of work that is done. You can never get more work out of a machine than you put into it. In fact, a machine always does less work on an object than the user does on the machine. That’s because a machine must use some of the work put into it to overcome f...
medmcqa
medmcqa_05_04698
Mifepristone is used in management of:
[ "Threatened abortion", "Fibroid", "Ectopic pregnancy", "Molar pregnancy" ]
C
This is used in the conservative management of ectopic due to its primary action of being and antiprogestin.
sciq
sciq_01_08908
Plants alternate between haploid and what?
[ "monoplooid", "monoxoid", "triploid", "diploid" ]
D
Plants alternate between haploid and diploid generations. Haploid cells have one of each pair of chromosomes. Diploid cells have two of each pair.
math_qa
mathqa_03_04082
two trains 140 m and 180 m long run at the speed of 60 km / hr and 40 km / hr respectively in opposite directions on parallel tracks . the time which they take to cross each other is ?
[ "11.52 sec", "10.1 sec", "10.6 sec", "10.8 sec" ]
A
"relative speed = 60 + 40 = 100 km / hr . = 100 * 5 / 18 = 250 / 9 m / sec . distance covered in crossing each other = 140 + 180 = 320 m . required time = 320 * 9 / 250 = 11.52 sec . answer : a"
ARC-Easy
arc_04_00224
A student wants to design an experiment regarding the behavior of crickets. Which is the best question to ask to begin the experiment?
[ "Do crickets have 6 legs or 8 legs?", "How long are the antennae of a cricket?", "Do crickets chirp more during the day or at night?", "What is the most common cricket species?" ]
C
null
sciq
sciq_01_10247
If everything else stays the same in a system with a gas in it, and the gas gets warmer, what will happen to its pressure, generally?
[ "it stays the same", "it drops", "it increases", "it's eliminated" ]
C
Why does the pressure of a gas increase as it gets warmer? Particles of a gas are constantly moving and bumping into things. The force of the collisions is measured by pressure. Pressure is the amount of force exerted on a given area, such as pounds of force per square inch. When gas particles heat up and gain energy, ...
math_qa
mathqa_03_03446
a certain fruit stand sold apples for $ 0.70 each and cherry for $ 0.50 each . if a customer purchased both apples and bananas from the stand for a total of $ 6.30 , what total number of apples and bananas did the customer purchase ?
[ "12", "11", "13", "14" ]
B
some multiple of 7 + some multiple of 5 should yield 63 . to get to a some multiple of 5 , we should ensure that a 3 or 8 ( 5 + 3 ) should be a multiple of 7 . 63 is a direct multiple of 7 , however in this case there wo n ' t be any cherry . hence the next option is to look for a multiple of 7 that has 8 as the unit d...
sciq
sciq_01_04429
What is the place called where the axon of one neuron meets the dendrite of another?
[ "synapse", "neurotransmitter", "apoptosis", "uptake" ]
A
The place where the axon of one neuron meets the dendrite of another is called a synapse . Synapses are also found between neurons and other types of cells, such as muscle cells. The axon of the sending neuron does not actually touch the dendrite of the receiving neuron. There is a tiny gap between them, the synaptic c...