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7.76k
sciq
sciq_01_08609
What does the kelvin scale measure?
[ "temperature", "height", "oxygen", "precipitation" ]
A
The SI scale for measuring temperature is the Kelvin scale . However, some scientists use the Celsius scale instead. If you live in the U. S. , you are probably more familiar with the Fahrenheit scale. Table below compares all three temperature scales. What is the difference between the boiling and freezing points of w...
sciq
sciq_01_02213
In machines that increase force, such as ramps and doorknobs and nutcrackers, what is the relation between output and input force?
[ "output is greater", "drop is greater", "input is greater", "output is smaller" ]
A
For machines that increase force — including ramps, doorknobs, and nutcrackers — the output force is greater than the input force. Therefore, the mechanical advantage is greater than 1.
openbookqa
obqa_02_04198
What gives birth to live young?
[ "tarantulas", "wildcats", "vultures", "anacondas" ]
B
mammals give birth to live young
openbookqa
obqa_02_03015
A shrew requires this for survival.
[ "radiation", "air", "silicone", "clothes" ]
B
an animal requires air for survival
ARC-Easy
arc_04_02132
In 1609, Galileo Galilei used lenses to construct the first telescope. His telescope allowed him to observe many objects in space. His invention of the telescope and the data he gathered directly contributed to the understanding that
[ "Earth is the center of the universe.", "the planets revolve around the Sun.", "all stars eventually explode.", "the universe has many galaxies." ]
B
null
math_qa
mathqa_03_04974
a bus trip of 360 miles would have taken 1 hour less if the average speed v for the trip had been greater by 5 miles per hour . what was the average speed v , in miles per hour , for the trip ?
[ "35", "40", "45", "50" ]
B
"the time is the distance / speed . the time difference is 1 hour . 360 / v - 360 / ( v + 5 ) = 1 360 ( v + 5 ) - 360 v = ( v ) ( v + 5 ) 1800 = ( v ) ( v + 5 ) 40 * 45 = ( v ) ( v + 5 ) v = 40 mph the answer is b ."
medmcqa
medmcqa_05_04391
Life cycle of filaria is
[ "Cyclodevelopmental", "Cyclopropagative", "Propagative", "Transovarian" ]
A
Ans. is 'a' i.e. Cyclo developmental Transmission of arthropod-borne diseases occur by following methodsDirect contact - e.g. scabies, pediculosisMechanical Transmission - housefly transmitted diseasesBiological Transmission - It is of three types:Propagative - The agent merely multiplies in vector, but no change in fo...
sciq
sciq_01_10544
What process, which results because of great pressure at the center of a star, causes stars to shine?
[ "electric fusion", "gravitational pull", "nuclear fusion", "energy fusion" ]
C
Stars shine because of nuclear fusion. Fusion reactions in the Sun's core keep our nearest star burning. Stars are made mostly of hydrogen and helium. Both are very lightweight gases. A star contains so much hydrogen and helium that the weight of these gases is enormous. The pressure at the center of a star is great en...
openbookqa
obqa_02_01109
How many times does an equinox occur in the first half of the year
[ "three times", "once", "twice", "four times" ]
B
an equinox occurs twice per year
sciq
sciq_01_05052
What property of ocean water increases rapidly as the water gets deeper?
[ "salt content", "speed", "pressure", "visability" ]
C
The pressure of ocean water increases rapidly as the water gets deeper.
openbookqa
obqa_02_03307
This is likely to be an insulator
[ "a flip flop", "a can", "water", "a car" ]
A
rubber is an thermal insulator
sciq
sciq_01_04470
What controls the movements of hands and arms?
[ "functional nervous system", "somatic nervous system", "autonomic nervous system", "voluntary nervous system" ]
B
Scott Schram. The somatic nervous system controls the movements of hands and arms . CC BY 2.0.
medmcqa
medmcqa_05_00673
Which of the following drugs is not used for the management of multiple myeloma
[ "Boezomib", "Hydroxyurea", "Melphelan", "Cyclophosphamide" ]
B
Answer is B (Hydroxyurea) Hydroxyurea is not recommended for the management of multiple myeloma Chemotherapeutic Agents Recommended in the management of multiple myeloma Boezomib Cyclophosphamide Doxorubicin Vincristine Lenalidomide Thalidomide Melphelan Dexamethasone / Prednisolone Interferon (Maintenance) The most co...
sciq
sciq_01_09078
The active transport of ions across the membrane causes an electrical gradient to build up across the what?
[ "plasma membrane", "cells membrane", "colloidal membrane", "components membrane" ]
A
The active transport of ions across the membrane causes an electrical gradient to build up across the plasma membrane. The number of positively charged ions outside the cell is greater than the number of positively charged ions in the cytosol. This results in a relatively negative charge on the inside of the membrane, ...
math_qa
mathqa_03_02298
if two students starting from same point , walking in the opposite directions with 6 km / hr and 9 km / hr as average speeds respectively . then the distance between them after 4 hours is ?
[ "65 km", "55 km", "15 km", "60 km" ]
D
explanation : total distance = distance traveled by person a + distance traveled by person b = ( 6 × 4 ) + ( 9 × 4 ) = 24 + 36 = 60 km answer : d
sciq
sciq_01_07816
Where do sperm go after leaving the testicles and before entering the vas deferens?
[ "anus", "skin", "epididymis", "clitoris" ]
C
Which of the following statements about the male reproductive system is false? a. The vas deferens carries sperm from the testes to the penis. Sperm mature in seminiferous tubules in the testes. Both the prostate and the bulbourethral glands produce components of the semen. The prostate gland is located in the testes. ...
ARC-Easy
arc_04_01540
A deer inherits some of its features from its parents. Other features come from its environment. Which feature would a deer most likely inherit from its parents?
[ "a long scar", "brown eyes", "missing teeth", "a broken antler" ]
B
null
openbookqa
obqa_02_03265
Wind can be used to
[ "make pasta", "turn back time", "make magic", "time travel" ]
A
wind is an inexhaustible resource
sciq
sciq_01_09780
What is an advantage of brightly colored fruits?
[ "attract animals to disperse their seeds", "dyes for clothing", "warning of poisons", "make pretty paintings" ]
A
Brightly colored fruits attract animals that may disperse their seeds. It’s hard to miss the bright red apples on these trees.
sciq
sciq_01_06700
What are the two types of vascular plants?
[ "seedless and seed", "dahlias and seed", "Water and spore", "ants and seed" ]
A
Vascular plants are further divided into seedless and seed plants.
ARC-Challenge
arc_04_03126
A rabbit population has increased noticeably in the past ten years. Which of the following is a reasonable hypothesis for this population growth?
[ "Competition for food has increased among rabbits.", "The rabbit's main predator has been eliminated by human development.", "Abnormal weather conditions have decreased water levels of the local ponds.", "An organism that relies on similar food sources has migrated into the area." ]
B
null
sciq
sciq_01_05470
What is the measure of sound intensity levels?
[ "moles", "centimeters", "decibels", "octaves" ]
C
Sound intensity levels are quoted in decibels (dB) much more often than sound intensities in watts per meter squared. Decibels are the unit of choice in the scientific literature as well as in the popular media. The reasons for this choice of units are related to how we perceive sounds. How our ears perceive sound can ...
sciq
sciq_01_07198
Tremetol, a metabolic poison found in the white snake root plant, prevents the metabolism of what?
[ "sugars", "sodium", "lactate", "lipids" ]
C
Tremetol, a metabolic poison found in the white snake root plant, prevents the metabolism of lactate. When cows eat this plant, it is concentrated in the milk they produce. Humans who consume the milk become ill. Symptoms of this disease, which include vomiting, abdominal pain, and tremors, become worse after exercise....
sciq
sciq_01_05372
What do we call coiled structures made of dna and proteins?
[ "Molecules", "chromosomes", "Organisms", "nodes" ]
B
Chromosomes are coiled structures made of DNA and proteins. They form after DNA replicates and are the form in which the genetic material goes through cell division. Chromosomes contain genes, which code for proteins.
openbookqa
obqa_02_01077
how many hours will it take the planet to complete a spinning motion?
[ "22", "24", "twenty hours", "twenty one hours" ]
B
a Rotation of the Earth on itself takes one day
openbookqa
obqa_02_02581
If a puppy steps on a lit cigarette, it is likely
[ "happy", "swell", "lovely", "pained" ]
D
burning a living thing usually causes harm to that living thing
medmcqa
medmcqa_05_02253
The transmembrane region of a protein is likely to have
[ "A stretch of hydrophilic amino acids", "A stretch of hydrophobic amino acids", "A disulphide loop", "Alternating hydrophilic and hydrophobic amino acids" ]
A
Some of the integral membrane proteins span the whole bilayer and they are called transmembrane proteins (Fig. 2.4). The hydrophobic side chains of the amino acids are embedded in the hydrophobic central core of the membrane. The transmembrane proteins can serve as receptors (for hormones, growth factors, neurotransmit...
math_qa
mathqa_03_00043
the average age of 15 students of a class is 15 years . out of these , the average age of 5 students is 12 years and that of the other 9 students is 16 years . the age of the 15 th student is ?
[ "11 years", "17 years", "21 years", "14 years" ]
C
"age of the 15 th student = [ 15 * 15 - ( 12 * 5 + 16 * 9 ) ] = ( 225 - 204 ) = 21 years . answer : c"
sciq
sciq_01_01973
What help should you use for disposing hazardous products?
[ "biohazard unit", "first aid kit", "guidelines on label", "call poison control" ]
C
Proper disposal depends on the waste. Many hazardous products have disposal guidelines on the label. That’s one reason why you should keep the products in their original containers. The labels also explain how to use the products safely. Follow the instructions to protect yourself and the environment. Most communities ...
sciq
sciq_01_00987
What are prokaryotic cells filled with?
[ "cytoplasm", "protein", "rna", "chlorophyll" ]
A
cytoplasm. Like all other cells, prokaryotic cells are filled with cytoplasm. It includes watery cytosol and other structures.
sciq
sciq_01_11093
Nitrogen is an important macronutrient because it is part of nucleic acids and proteins. atmospheric nitrogen, which is the diatomic molecule n2, or dinitrogen, is the largest pool of nitrogen in these?
[ "gas planets", "aquatic ecosytems", "terrestrial ecosystems", "desert biomes" ]
C
Nitrogen Fixation: Root and Bacteria Interactions Nitrogen is an important macronutrient because it is part of nucleic acids and proteins. Atmospheric nitrogen, which is the diatomic molecule N2, or dinitrogen, is the largest pool of nitrogen in terrestrial ecosystems. However, plants cannot take advantage of this nitr...
math_qa
mathqa_03_00747
10 machines , each working at the same constant rate , together can complete a certain job in 12 days . how many additional machines , each working at the same constant rate , will be needed to complete the job in 8 days ?
[ "2", "3", "4", "5" ]
D
"another solution which is faster is since each machine works at a constant rate . the time needs to bought down from 12 to 8 . so the new time is 2 / 3 of the original time . thus to achieve this we need the rate to be 3 / 2 of original . so 3 / 2 * 10 = 15 so we need 15 - 10 = 5 more machines . answer : d"
medmcqa
medmcqa_05_04727
In brown-sequard syndrome sensation, that is lost at the same side of lesion is -
[ "Pain", "Touch", "Temperature", "Proprioception" ]
D
Source: Ganong-142 Brown-Sequard syndrome, also known as Brown-Sequard's hemiplegia and Brown-Sequard's paralysis, is a loss of sensation and motor function (paralysis and ataxia) that is caused by the lateral hemisection (cutting) of the spinal cord. Other synonyms are crossed hemiplegia, hemiparaplegic syndrome, hemi...
sciq
sciq_01_07326
What do you call a pure substance that cannot be broken down into different types of substances?
[ "element", "sample", "compound", "molecule" ]
A
An element is a pure substance that cannot be broken down into different types of substances. There are almost 120 known elements ( Figure below ), each with its own personality. The chemical and physical properties of one element differ from any other. Elements are arranged according to their properties in the Periodi...
openbookqa
obqa_02_00925
Which changes an object's shape and mass?
[ "smashing it", "tossing it", "rolling it", "touching it" ]
A
breaking down an object changes that object 's shape and mass
math_qa
mathqa_03_03324
a student gets 60 % in one subject , 80 % in the other . to get an overall of 75 % how much should get in third subject .
[ "75 %", "25 %", "85 %", "55 %" ]
C
let the 3 rd subject % = x 60 + 80 + x = 3 * 75 140 + x = 225 x = 225 - 140 = 85 answer : c
openbookqa
obqa_02_02952
Which is likely water vapor?
[ "a dog", "a cat", "a rat", "puffy white fliers" ]
D
water vapor is found in the atmosphere
math_qa
mathqa_03_00549
a bag contains 8 red , 6 blue and 4 green balls . if 2 ballsare picked at random , what is the probability that both are red ?
[ "1 / 13", "2 / 23", "5 / 26", "7 / 30" ]
D
"p ( both are red ) , = 8 c 216 c 2 = 8 c 216 c 2 = 28 / 120 = 7 / 30 d"
medmcqa
medmcqa_05_03789
Pheochromocytoma may be associated with:
[ "Medullary carcinoma of the thyroid", "Papillary carcinoma of the thyroid", "Anaplastic carcinoma of the thyroid", "Follicular carcinoma of the thyroid" ]
A
Ans. A. Medullary carcinoma of the thyroidMEN 2a: Sipple syndromeMEN 2ba. Thyroid; Medullary thyroid carcinomaa. Thyroid: Medullary thyroid carcinomab. Pheochromocytomab. Pheochromocytomac. Parathyroid hyperplasiac. Mucosal neuromas and Marfanoid appearance
sciq
sciq_01_08630
What kind of organisms are prokaryotes?
[ "multicellular organisms", "viral", "single - flagellated", "single-celled" ]
D
All prokaryotes are single-celled organisms.
math_qa
mathqa_03_03748
the average of 10 numbers is calculated as 16 . it is discovered later on that while calculating the average , the number 55 was incorrectly read as 25 , and this incorrect number was used in the calculation . what is the correct average ?
[ "17", "19", "25", "31" ]
B
"the total sum of the numbers should be increased by 30 . then the average will increase by 30 / 10 = 3 . the correct average is 19 . the answer is b ."
medmcqa
medmcqa_05_01225
Pond's fractures are common in: AP 09
[ "Children", "Adolescent", "Adult", "Old age" ]
A
Ans. Children
math_qa
mathqa_03_00860
in what time will a railway train 56 m long moving at the rate of 39 kmph pass a telegraph post on its way ?
[ "3 sec", "4 sec", "5 sec", "6 sec" ]
C
"t = 56 / 39 * 18 / 5 = 5 sec answer : c"
openbookqa
obqa_02_00076
When does electricity flow through a conductor?
[ "when it's outside around lighting", "when it's attached to a battery", "when it's attached to a human", "when it's near a light bulb" ]
B
sending electricity through a conductor causes electricity to flow through that conductor
sciq
sciq_01_07329
Metals, metalloids, and nonmetals are the different classes of what?
[ "structures", "elements", "ions", "compounds" ]
B
The classes of elements are metals, metalloids, and nonmetals. They are color-coded in the table. Blue stands for metals, orange for metalloids, and green for nonmetals. You can read about each of these three classes of elements later in the chapter, in the lesson "Classes of Elements. ".
medmcqa
medmcqa_05_02386
Beaded margin of eyelid is seen in
[ "Erythema granuloma annulare", "Leprosy", "Granuloma annulare", "Lipoid proteinosis" ]
D
Lipoid proteinosis is a rare, recessively inherited disorder, characterized by infiltration of the skin, oral cavity and larynx. Patients with this genodermatosis can usually be recognized instantly because of husky voice, inability to protrude tongue and thickened eyelids.
math_qa
mathqa_03_04936
if n is a natural number , then 6 n ^ 2 + 6 n is always divisible by ?
[ "6 only", "6 and 12", "12 only", "18 only" ]
B
"6 n ^ 2 + 6 n = 6 n ( n + 1 ) , which is always divisible by 6 and 12 both , since n ( n + 1 ) is always even . answer is b"
sciq
sciq_01_10958
What is a force that opposes motion between any surfaces that are touching?
[ "tension", "vibration", "gravity", "friction" ]
D
Friction is a force that opposes motion between any surfaces that are touching.
openbookqa
obqa_02_00687
If a cat is given cyanide, it will
[ "expire", "cough", "puke", "eat" ]
A
poison causes harm to living things
openbookqa
obqa_02_02998
Seeds from a prickle bush can be moved across a continent if
[ "foxes nap", "sharks swim", "birds die", "gulls help" ]
D
birds are a vehicle for spreading the seeds of a plant
sciq
sciq_01_01011
The vagina starts at the vulva and ends where?
[ "testicle", "clitoris", "pelvic brim", "the uterus" ]
D
The vagina is a tube-like structure about 9 centimeters (3.5 inches) long. It begins at the vulva and extends upward to the uterus. It has muscular walls lined with mucous membranes. The vagina has two major reproductive functions. It receives sperm during sexual intercourse, and it provides a passageway for a baby to ...
sciq
sciq_01_08043
What do refrigerator magnets contain that make them stick to a refrigerator door?
[ "steel", "zinc", "iron", "copper" ]
C
Refrigerator magnets stick to a refrigerator door because it contains iron. Why won’t the magnets stick to wooden cabinet doors?.
sciq
sciq_01_06310
What kind of medical intervention seeks to eradicate diseases like polio and measles?
[ "malnutrition", "vaccination", "nutrition", "surgical intervention" ]
B
medmcqa
medmcqa_05_03136
Second most common neoplasm seen in children is-
[ "Lymphoma", "Brain tumour", "Wilm's tumour", "Neuroblastoma" ]
B
Ans. is 'b' i.e., Brain tumour
medmcqa
medmcqa_05_00362
For which one of the following tumours Gastrin is a biochemical marker-
[ "Medullary carcinoma of thyroid", "Pancreatic neuroendocrine tumour", "Pheochromocytoma", "Gastrointestinal stromal tumor" ]
B
Pancreatic neuroendocrine tumors (PanNETs, PETs, or PNETs), often referred to as "islet cell tumors", or "pancreatic endocrine tumors" are neuroendocrine neoplasms that arise from cells of the endocrine (hormonal) and nervous system within the pancreas. PanNETs are a type of neuroendocrine tumor, representing about one...
sciq
sciq_01_00908
During asexual reproduction, fungi produce haploid spores by what process involving a haploid parent cell?
[ "divergence", "mitosis", "evaporation", "osmosis" ]
B
During asexual reproduction, fungi produce haploid spores by mitosis of a haploid parent cell. A haploid cell has just one of each pair of chromosomes. The haploid spores are genetically identical to the parent cell. Spores may be spread by moving water, wind, or other organisms. Wherever the spores land, they will dev...
sciq
sciq_01_08165
Atoms that have gained electrons and become negatively charged are called what?
[ "negative atoms", "anions", "negative ions", "cations" ]
C
Changes to the nucleus of an atom require tremendous amounts of energy, so protons are not easily gained or lost by atoms. Electrons, on the other hand, are held fairly loosely and can often be removed quite easily. When an object loses some electrons, the remaining object is now positively charged because it has an ex...
sciq
sciq_01_00592
Controlling muscles and maintaining balance are just two of the roles of what system?
[ "electrical system", "digestive system", "bacterial system", "nervous system" ]
D
Controlling muscles and maintaining balance are just two of the roles of the nervous system. The nervous system also lets you:.
openbookqa
obqa_02_00872
A pond can be a community because
[ "fish and frogs get along", "there is a mix of life", "life forms gather together", "there is a lot of growth" ]
B
a community is made of many types of organisms in an area
sciq
sciq_01_04778
Which primate group generally lives alone?
[ "gorilla", "human", "orangutan", "chimpanzee" ]
C
Yes! This is the Hubbard Glacier in Alaska. As the glacier meets the relatively warm seawater, it calves. Pieces of the glacier break off and fall into the water. These icebergs may be as large as a ten-story building.
medmcqa
medmcqa_05_02122
A person with violent behavior and agitation was diagnosed to have Schizophrenia and was receiving haloperidol. Following this he developed rigidity and inability to move his eyes. Which of the following drugs should be added to his treatment intravenously for this condition?
[ "Diazepam", "Resperidone", "Promethazine", "Haloperidol" ]
C
Ans. c. Promethazine (Ref: Harrison 19/e p2624, 18/e p3544. Katzung 12/e p495)Rigidity and inability to move eyes after haloperidol use in a patient of Schizophrenia is highly suggestive of acute muscular dystonia. Treatment with IM anticholinergic (benztropine) or IV/IM antihistaminic (diphenhydramine hydrochloride al...
math_qa
mathqa_03_04698
let f ( x , y ) be defined as the remainder when ( x – y ) ! is divided by x . if x = 24 , what is the maximum value of y for which f ( x , y ) = 0 ?
[ "12", "15", "18", "20" ]
D
"the question is finding y such that ( 24 - y ) ! is a multiple of 24 . that means we need to have 2 ^ 3 * 3 in ( 24 - y ) ! 4 ! is the smallest factorial number with 2 ^ 3 * 3 as a factor . 24 - y = 4 y = 20 the answer is d ."
openbookqa
obqa_02_01899
something that can negatively impact an organisms health is
[ "graduation", "a placebo", "chickenpox", "chemistry" ]
C
illness has a negative impact on an organism 's health
sciq
sciq_01_07837
Name the physicist who discovered radioactivity?
[ "antoine henri becquerel", "louis pasteur", "neal degrasse tyson", "albert einstein" ]
A
Radioactivity was discovered in 1896 by a French physicist named Antoine Henri Becquerel. Becquerel was experimenting with uranium, which glows after being exposed to sunlight. Becquerel wanted to see if the glow was caused by rays of energy, like rays of light and X-rays. He placed a bit of uranium on a photographic p...
medmcqa
medmcqa_05_02433
Strongest force of bonding b/w retina an RPE
[ "Vitreous gel pressure", "Intraocular fluid pressure", "RPE water transpo", "IPM" ]
D
D i.e. IPM Interphotoreceptor matrix (IPM) is the strongest mechanism for bonding the retina to retinal pigment epithelium (RPE)Q. It also provide physical suppo of photoreceptors and transfer nutrients and visual pigment. The quality of these functions is controlled by RPE through the synthesis of matrix materials, tr...
sciq
sciq_01_07447
Steel, bronze, and brass are examples of what?
[ "chemicals", "alloys", "oxides", "compounds" ]
B
Pure metals may be less useful than mixtures of metals, called alloys. Examples of alloys include steel, bronze, and brass.
openbookqa
obqa_02_04741
When is fog most likely to occur
[ "3 p.m.", "midnight", "6 p.m.", "noon" ]
B
fog is formed by water vapor condensing in the air
ARC-Easy
arc_04_01616
In an atom, protons plus neutrons make up the atom's
[ "electric charge.", "atomic mass.", "atomic number.", "electron number." ]
B
null
sciq
sciq_01_08228
The heart is an organ in which system?
[ "circulatory system", "nervous system", "immune system", "respiratory system" ]
A
Human organs are organized into organ systems. An organ system is a group of organs that work together to carry out a complex function. Each organ of the system does part of the overall job. For example, the heart is an organ in the circulatory system. The circulatory system also includes the blood vessels and blood. T...
ARC-Easy
arc_04_00492
Which biological process in mammals occurs largely due to cell division?
[ "healing", "respiration", "decomposition", "photosynthesis" ]
A
null
medmcqa
medmcqa_05_01201
Patient with mitral stenosis is having surgery tomorrow. There is some liver compromise. Which of the following inhalational agent is preferred –
[ "Halothane", "Enflurane", "Xenon", "Sevoflurane" ]
C
"Maintenance of anesthesia in MS is best accomplished by use of drugs with minimal effect on heart rate, myocardial contractility, cardiac output and systemic and pulmonary vascular resistence". ─Stoelting Amongst the given options, Xenon has minimal effect on cardiovascular side effects. Halothone decrease myocardial...
openbookqa
obqa_02_04153
During a prolonged shortage of water, a tree's ability to add extra tissue and grow thick rings is slowed and the tree produces
[ "wider growth rings", "thinner growth rings", "more leafy growths", "annual scar tissue" ]
B
as the amount of available water decreases , tree-growth rings will become narrower
openbookqa
obqa_02_04815
A riverbank is made of what?
[ "animals", "oceans", "loam", "bones" ]
C
a riverbank is made of soil
openbookqa
obqa_02_02894
Digestion is when stomach acid breaks down
[ "a pizza", "a house", "a rock", "a car" ]
A
digestion is when stomach acid breaks down food
sciq
sciq_01_00187
The secondary wall contains _________ , a secondary cell component in plant cells that have completed cell growth/expansion.
[ "cellulose", "lignin", "glucogen", "cytoplasm" ]
B
Microtubules guide the formation of the plant cell wall. Cellulose is laid down by enzymes to form the primary cell wall. Some plants also have a secondary cell wall. The secondary wall contains a lignin, a secondary cell component in plant cells that have completed cell growth/expansion.
ARC-Easy
arc_04_01934
In which structure is the Sun located?
[ "Milky Way Galaxy", "Andromeda Galaxy", "Cat's Eye Nebula", "Horseshoe Nebula" ]
A
null
medmcqa
medmcqa_05_02688
The classification proposed by the International Lymphoma Study Group for non - Hodgkin&;s lymphoma is known as -
[ "Kiel classification", "REAL classification", "WHO classification", "Rappapo classification" ]
B
<p>International Lymphoma Study Group (Harris et al) proposed revised European -American classification of lymphoid neoplasms (REAL classification ) .This classification was based on the hypothesis that all forms of lymphoid malignancies represent malignant counterpas of normal population of immune cells present in the...
math_qa
mathqa_03_00533
what is remainder of the division ( 1125 * 1127 * 1129 ) / 12 ?
[ "0", "3", "1", "2" ]
B
"remainder will be number / 100 here as the divisor is two digit number = 12 . hence checking for the last two digits = 5 * 7 * 9 = 15 thus remainder = 3 . answer : b"
medmcqa
medmcqa_05_00013
A failure of the tricuspid leaflets to attach to the annulus fibrosus will result in which of the following?
[ "Persistent truncus aeriosus (PTA)", "Ebstein's anomaly", "Transposition of the great aeries", "Common ventricle" ]
B
B. Failure of fusion of the tricuspid leaflets with the annulus fibrosus results in Ebstein's anomaly PTA and TOF is a defect of aoopulmonary septum.
sciq
sciq_01_05855
The surfaces of the bones at the joints are covered with a smooth layer of cartilage, which reduces what force between the bones when they move?
[ "friction", "gravity", "expulsion", "vibration" ]
A
Movable joints allow the greatest movement and are the most common. In these joints, the bones are connected by ligaments. The surfaces of the bones at the joints are covered with a smooth layer of cartilage. It reduces friction between the bones when they move. The space between the bones is also filled with a liquid ...
medmcqa
medmcqa_05_02839
Commonest fungal infection in neutropenia -
[ "Aspergillus Fumigatus", "Candida", "Aspergillus calvus", "Mucormycosis" ]
B
Ans. is 'b' i.e., Candidao Cell mediated immune responses, especially CD4 cells, are impoant in controlling mucocutaneous candidiasis. o The neutrophil is probably crucial for resistance to systemic candidiasis.
sciq
sciq_01_07611
Weather maps show storms, air masses, and what?
[ "regions", "currents", "patterns", "fronts" ]
D
Weather maps show storms, air masses, and fronts.
sciq
sciq_01_04852
An electric current flows in a path called what?
[ "electric course", "electric circuit", "electric ring", "fuse" ]
B
Electricity refers to a number of phenomena associated with the presence and flow of electric charge. Electricity includes such diverse things as lightning, static electricity, the current generated by a battery as it discharges, and many other influences on our daily lives. The flow or movement of charge is an electri...
sciq
sciq_01_04941
The process that a plant increases in size is known as what?
[ "trend", "growth", "harvest", "fertilization" ]
B
sciq
sciq_01_01375
What type of competition occurs between members of the same species?
[ "interspecific", "intraspecific", "interspecies", "exospecies" ]
B
Intraspecific competition occurs between members of the same species. For example, two male deer may compete for mates by clashing their antlers together.
sciq
sciq_01_01036
What does it mean to be a diploid organism?
[ "yolk has two copies of each gene", "micelles have two copies of each gene", "taproot has two copies of each gene", "organism has two copies of each gene" ]
D
Early land plants also evolved a dominant sporophyte generation. Sporophytes are diploid, so they have two copies of each gene. This gives them a "back-up" copy in case of mutation. This was important for coping with the strong solar radiation and higher risk of mutations on land.
sciq
sciq_01_03384
What is the term for electric current that keeps reversing direction?
[ "AC/DC", "magnetic current", "alternating current", "direct current" ]
C
The Figure below shows the direction of the current that is generated by a moving magnet. If the magnet is moved back and forth repeatedly, the current keeps changing direction. In other words, alternating current (AC) is produced. Alternating current is electric current that keeps reversing direction.
medmcqa
medmcqa_05_00719
The hormone which helps in milk secretion:September 2008, September 2010
[ "Oxytocin", "Growth hormone", "FSH", "Prolactin" ]
D
Ans. D: ProlactinProlactin causes milk secretion from the breast after estrogen and progesterone priming. Its effect on the breast involves increased action of mRNA and increased production of casein and lactalbumin.Prolactin also inhibits the effects of gonadotropins, possibly by an action at the level of the ovary.Th...
sciq
sciq_01_08143
Besides the uppermost mantle, what else is the lithosphere composed of?
[ "outer core", "surface", "inner core", "crust" ]
D
The lithosphere is composed of both the crust and the uppermost mantle. The lithosphere is a brittle, rigid solid. It is easily cracked or broken.
medmcqa
medmcqa_05_04193
Maximum electrophoretic mobility and least lipid content -
[ "Chylomicrons", "HDL", "LDL", "VLDL" ]
B
Ans. is 'b' i.e., HDL o HDL:- Has maximum electrophoretic mobility, has maximum density, has minimum lipid content, has maximum protein (apoprotein) content, are smallest in size, has maximum phospholipid, has minimum triglycerideso Chylomicrons :- Have no electrophoretic mobility, have minimum density, have maximum li...
math_qa
mathqa_03_01371
3 men and 8 women complete a task in same time as 6 men and 2 women do . how much fraction of work will be finished in same time if 5 men and 2 women will do that task .
[ "6 / 7", "3 / 10", "3 / 18", "3 / 16" ]
A
"3 m + 8 w = 6 m + 2 w 3 m = 6 w 1 m = 2 w therefore 3 m + 8 w = 14 w 5 m + 2 w = 12 w answer is 12 / 14 = 6 / 7 answer : a"
medmcqa
medmcqa_05_03767
Fertilization takes place after how much time of ovulation -
[ "1-2 days", "5-6 days", "8-12 days", "> 12 days" ]
A
Ans. is 'a' i.e., 1-2 dayso Human ovum remains fertile for 12-24 hours after ovulation. Thus, fertilization can occur during this period only.o Reproductive life of ovum - 24 hours (12-24 hours)o Reproductive life of sperm - 24 - 72 hours
sciq
sciq_01_05773
Fibrous root systems have many small branching roots called what?
[ "tendrils", "fibrous roots", "taproots", "vines" ]
B
Fibrous root systems have many small branching roots, called fibrous roots , but no large primary root. The huge number of threadlike roots increases the surface area for absorption of water and minerals, but fibrous roots anchor the plant less securely.
medmcqa
medmcqa_05_03668
For diatoms test the best site for taking sample is
[ "Lungs", "Bone marrow in Ulna", "Bone marrow in femur", "Muscle" ]
C
C i.e. Bone marrow in femur
sciq
sciq_01_09983
Newton’s third law of motion describes what property of forces that means balance?
[ "gravity", "magnetism", "acceleration", "symmetry" ]
D
4.4 Newton’s Third Law of Motion: Symmetry in Forces There is a passage in the musical Man of la Mancha that relates to Newton’s third law of motion. Sancho, in describing a fight with his wife to Don Quixote, says, “Of course I hit her back, Your Grace, but she’s a lot harder than me and you know what they say, ‘Wheth...
ARC-Easy
arc_04_01050
Which statement best describes why a calcium-fortified juice would advertise that it is good for growing children?
[ "Calcium helps the growth of bones.", "Calcium provides energy for growth.", "Children need to drink a lot of fluids.", "Children need calcium to prevent allergies." ]
A
null
sciq
sciq_01_00770
Lymphoma is a cancer of a type of what type of cells, called lymphocytes?
[ "red blood cells", "brain cells", "white blood cells", "lung cells" ]
C
Blood cancers affect the production and function of your blood cells. Most of these cancers start in your bone marrow where blood is produced. In most blood cancers, the normal production of blood cells is replaced by uncontrolled growth of an abnormal type of blood cell. These abnormal blood cells are cancerous cells,...
openbookqa
obqa_02_00708
To be environmentally friendly
[ "use your feet to pedal somewhere", "hop in a sedan", "put the pedal to the metal in a truck", "ride a motorcycle around town" ]
A
riding a bike does not cause pollution
math_qa
mathqa_03_00732
a student has to obtain 60 % of the total marks to pass . he got 160 marks and failed by 20 marks . the maximum marks are ?
[ "210", "280", "300", "320" ]
C
"let the maximum marks be x then , 60 % of x = 160 + 20 60 x / 100 = 180 60 x = 180 * 100 = 18000 x = 300 answer is c"
math_qa
mathqa_03_01448
tickets to a certain concert sell for $ 20 each . the first 10 people to show up at the ticket booth received a 40 % discount , and the next 20 received a 15 % discount . if 56 people bought tickets to the concert , what was the total revenue from ticket sales ?
[ "$ 600", "$ 740", "$ 850", "$ 980" ]
D
"price of 1 ticket = 20 $ revenue generated from sales of first 10 tickets = 10 * ( 60 / 100 * 20 ) = 10 * 12 = 120 revenue generated from sales of next 20 tickets = 20 * ( 85 / 100 * 20 ) = 20 * 17 = 340 revenue generated from sales of last 26 tickets = 20 * 26 = 520 revenue generated from sales of 56 tickets = 120 + ...