Full Syllabus Biology-- 04 (NEET/AIIMS Online Practice Exam)
MCQ
Entrance level questions
Which of the following are uricotelic animals?
Rohu, frog
Camel, frog
Lizard, crow
Eagle, earthworm
Which of these conditions produces a large volume of dilute urine?
Decreased ADH secretion
Increased renin secretion
Increased angiotensin II production
Increased aldosterone secretion
The part of a nephron between Bowman’s capsule and the loop of Henle is the :-
juxtaglomerular apparatus
proximal tubule
collecting duct
distal tubule
Human sperm was discovered by
Leeuwenhoek
Aristotle
Graaf
Pander
Which one of these is believed to have first made use of fire for hunting, cooking and protection?
Java ape man
Neanderthal man
Cro-magnon man
Peking man
Bordeaux mixture was discovered accidently for controlling a disease named :-
downy mildew of potato
downy mildew of grape vine
late blight of potato
brown spot of rice
Nissl granules in nerves are rich in:-
RER/ribosomes
Golgi bodies
mitochondria
SER
Heterosis is extra vigour in hybrids, this term was given by :-
Shull
Kolreuter
Johannsen
Fair Child
CsCl gradient centrifugation helps in separation of DNA fragments, the basic principle involved is that of:-
DNA binds firmaly to CsCl
CsCl degrades DNA into desired length fragments
Only smaller fragments of DNA bind with CsCl
DNA fragments move and accumulate at the position where the density of two (DNA and CsCl) is the same
The age of rock is calculated on the basis of:-
types of fossils present
number of strata present
amount of uranium present
amount of lead present
Sharpey’s perforating fibres are related with :-
heart contraction
muscle relaxation
fixing of teeth
None of these
Wharton’s duct is the duct of:-
parotid gland
submandibular salivary gland
submaxillary gland
pancreatic gland
A drug called morphine is obtained from:-
Papaver somniferum
Cannabis sativa
Cajanus cajan
Mule represents a common ancestor of horse and ass
Epigynous flowers with numerous stamens are found in
Ranunculus muricatus
Fragaria indica
Croton roxburghii
Syzygium cuminis
Interphase nucleus is enclosed by:-
non-porous nuclear membrane
porous double nuclear membrane
non-porous double discontinuous nuclear membrane
a single porous unit membrane
Golgi apparatus A) transports and modifies the materials. B) secretes mucin in respiratory tract. C) secretes slime in insectivorous plants. What is correct? :-
A wrong, B and C correct
B wrong, A and C correct
B is wrong and A correct
Wrong none, correct all
In which of the following, the lowest number of chromosomes is found ?
Haplopappus gracilis
Poa litorosa
Salix tetrasperma
Ageratum coigzoides
The nucleotide sequence of an anticodon is complementary to nucleotide sequence in :-
tRNA
mRNA
DNA
rRNA
Which one of the following amino acids stabilizes protein structure by forming disulphide bonds?
Arginine
Lysine
Cysteine
Alanine
The correct arrangement of leg parts of cockroach is :-
coxa, femur, trochanter, tibia and claws
coxa, trochanter, femur, tibia, tarsus and claws
coxa, tibia, femur, planulae and claws
NoneNone of the above
During respiration in frogs, the hyoid and floor of the buccal cavity are raised with the help of :-
sternohyal muscles
petrohyal muscles
ligaments
intercoastal muscles
Jacobson’s organs, which are additional olfactory organs, are present in :-
rats
snakes
humans
All of these
Right lung of a rat has four lobes. How many lobe/lobes have the left lung?
One
Two
Three
Four
In frog’s heart, which of the following is considered as pacemaker?
Pyrangium
Synangium
Sinus venosus
Truncus arteriosus
Which of the following helps in respiration of lichens?
Isidia
Soredia
Cephalodia
Cyphella
Green muffler is useful against
air pollution
noise pollution
noise pollution
radioactive pollution
Passage cells are found in :-
endodermis
pericycle
epiblema
cortex
Which of the following organelles is not related with photorespiration?
Peroxisome
Chloroplast
Mitochondria
Lysosome
Proteins are
polysaccharides
polyamides
polyglycol
polynucleotides
Introduction of foreign gene for improving genotype is called :-
tissue culture
vernalization
genetic engineering
eugenics
Pure line breed refers to:-
homozygosity
heterozygosity
linkage
Both (heterozygosity) and (linkage )
Cyclosporine is used:-
for allergy
as immunodepressent
prophylactic for virus
None of the above
What is left, when bath sponges dries up?
Spicules
Holdfast
Spongin fibres
Tentacles
Hydra receives impulses and stimuli through :-
nerve cells
sensory cells
neuron cell
nematocysts
Adult of Wuchereria bancrofti attacks on :-
kidney
heart
nervous system
lymph vessel
Polyploidy of ovum of angiosperms is :-
haploid
diploid
triploid
polyploid
Duplicate geneAnaerobic respiration, after glycolysis is also called as:-
fermentation
fragmentation
restoration
multiplication
The true vocal cords and the opening between them are called the :-
cricoid cartilage
faeces
glottis
thyroid cartilage
The process of erythropoiesis:-
takes place in the spleen
requires vitamin and folate
is inhibited by erythropoietin
Both (requires vitamin and folate) and (is inhibited by erythropoietin)
Which of these is not found in erythrocytes?
Lipids
ATP
Haemoglobin
Ribosomes
A condition in which a fat-like substance containing cholesterol is deposited in the walls of arteries to form plaque is called:-
arteriosclerosis
atherosclerosis
aneurysm
anastomosis
The inner layer of blood vessel walls, consisting of endothelium, basement membrane, lamina propria and internal elastic membrane, is the :-
tunica adventitia
tunica interna
tunica media
tunica muscularis
Which of these blood vessels has tunica adventitia as the predominant layer ?
Elastic arteries
Medium arteries
Arterioles
Large veins
The largest pair of salivary glands, which produce mostly watery saliva are the :-
laryngeal glands
parotid glands
pharyngeal glands
sublingual glands
Saliva :-
secretion (of the serous portion) is increased primarily by sympathetic stimulation
contains amylase, which digests cellulose
contains lysozyme, which has a weak antibacterial action
contains pepsin, which digests protein
Transpiration is least in :-
good soil moisture
high wind velocity
dry environment
high atmospheric humidity
What will be the zero in a fully turgid cell ?
TP
WP
SP
OP
Stomata open and close due to :-
circadian rhythm
genetic clock
pressure of gases inside the leaves
turgor pressure of guard cells
Phenyl Mercuric Acetate (PMA) results in :-
reduced photosynthesis
reduced transpiration
reduced respiration
killing of plants
In terrestrial habitats, temperature and rainfall conditions influenced the :-
water transformations
transpiration
thermoperiodism
translocation
An adaptation for better gaseous exchange in plant leaves is :-
hair on lower surface
multiple epidermis
waxy cuticle
stomata on lower surface away from direct sun rays
Fusiform initial forms:-
vascular rays
ray parenchyma
tracheary elements
primary phloem
Which organelle is present in higher numbers in secretory cells ?
Dictyosome
ER
Lysosome
Vacuole
Bio-indicators are used for :-
oxygen demand
air pollution
mineral presence
All of these
Phototropism is due to the hormone :-
IAA
GA
2,4-D
cytokinin
DNA is acidic due to:-
sugar
phosphoric acid
purine
pyrimidine
RNA is not found in:-
chromosome
plasmalemma
nusleolus
ribosome
If a cross is made between AA and aa, the nature of progeny will be :-
genotypically AA, phenotypically a
genotypically Aa, phenotypically a
genotypically Aa, phenotypically A
genotypically aa, phenotypically A
The largest number of chloroplasts is found in :-
palisade tissue
spongy tissue
transfusion tissue
bundle sheath cells
A protein rich green alga is :-
Chlorella
Spirulina
Ulothrix
Spirogyra
Growth rings are formed due to activity of :-
extrastelar cambium
intrastelar cambium
interstelar cambium
Both (intrastelar cambium) and (interstelar cambium)
In the sporogonium of which plant, columella is present ?
Penicillium
Spirogyra
Rhizopus
Ulothrix
Rarely among angiosperms the pollen grains influence the endosperm. This is called as :-
metaxenia
Nemec phenomenon
xenia
mesogamy
Which of the following taxonomists described classification of plant kingdom into ‘Families of flowering plants’ ?
Cronquist
Thakhtajan
Benson
Hutchinson
Mutations, which alter nucleotide sequence within a gene are called :-
frame shift mutations
base pair substitutions
Both (frame shift mutations) and (base pair substitutions)
None of the above
The plant ash is an indication of :-
organic matter of plant
waste product
mineral salts absorbed by plants
None of the above
Which of the following fungi is found useful in the biological control of plant diseases? :-
Penicillium notatum
Phytophthora parasitica
Mucor mucido
Trichoderma viridae
Which organism was used by Beadle and Tatum to propose one gene-one enzyme hypothesis ?
E. coli
Nostoc
Drosophila
Neurospora
When a tall plant with rounded seeds (TTRR)is crossed with a dwarf plant with wrinkled seeds (ttrr), the generation consists of tall plants with rounded seeds. How many types of gametes a plant would produce ?
One
Eight
Four
Three
Tetradynamous stamens are found in :-
Chrysanthemum
Zinnia
Poppy
Brassica
The double helix model of Watson and Crick is known as :-
C-DNA
B-DNA
Z-DNA
D-DNA
In photosynthesis, energy from light reaction to dark reaction is transferred in the form of :
ADP
ATP
RuDP
chlorophyll
In angiosperms, pollen tube liberates their male gametes into the :-
central cell
antipodal cell
egg cell
synergids
Seed dormancy takes place due to :-
ethylene
ABA
IAA
starch
Which of the following is a correct match ?
Down’s syndrome ----- 21st chromosome
Sickel cell anaemia-----X-chromosome
Haemophilia ------------ Y-chromosome
Parkinsondisease ------ X and Y-chromosomes
Hydrolytic enzymes which act at low pH are called as :-
hydrolases
alpha-amylases
hydrolases
peroxidases
Acromegaly is caused by:-
excess of STH
excess of thyroxine
deficiency of thyroxine
excess of adrenaline
In which era reptiles were dominating ?
Coenozoic era
Mesozoic era
Palaeozoic era
Archaeozoic era
What is true for individual of same species ?
Live in same niche
Live in same habitat
Interbreeding
Live in different habitats
In which animal, the nerve cell is present but brain is absent ?
Sponge
Earthworm
Cockroach
Hydra
In bacteria, plasmid is :-
extrachromosomal material
main DNA
non-functional DNA
repetetive gene
Two different species cannot live for long duration in the same niche or habitat. This law is :-
Allen’s law
Mendel’s law
Cause’s competitive exclusion principle
Weismann’s theory
There are three genes a, b, c, percentage of crossing over between a and b is 20%, b and c is 28% and a and c is 8%. What is the sequence of genes on chromosome?
b, a, c
a, b, c
a, c, b
None of these
Manipulation of DNA in genetic engineering became possible due to the discovery of:-
restriction endonuclease
DNAligase
transcriptase
primase
Convergent evolution is illustrated by :-
starfish and cuttlefish
dogfish and whale
rat and dog
bacterium and protozoan
Which one of the following is a matching pair of an animal and a certain phenomenon it exhibits?
Chamaeleon — Mimicry
Taenia — Polymorphism
Pheretima — Sexual dimorphism
Musca — Complete metamorphosis
Random genetic drift in a population probably results from :-
constant low mutation rate
interbreeding within this population
highly genetically variable individuals
large population size
The origin of kidney and ureter in Rana tigrina is :-
all mesodermal
all endodermal
ectodermal and mesodermal
Both (all mesodermal) and (all endodermal)
Which of the following is not a case of epimorphosis?
Formation of sperms from small clumps of cells.
Regeneration of tail in a lizard.
Replacement of severed arm in star fish.
Replacement of limb in salamander.
Assertion: In a cell only nuclear membrane have well defined pores. Reason: Macromolecules like RNA alongwith proteins cannot be transported by normal processes from nucleoplasm to cytoplasm.
If both Assertion and Reason are true and the Reason is a correct explanation of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true, but the Reason is false.
If Assertion is false but the Reason is true.
Assertion: Some protein of plasma membrane are called extrinsic proteins. Reason: Extrinsic proteins are loosely bonded to lipid bilayer and can be easily removed from the bilayer.
If both Assertion and Reason are true and the Reason is a correct explanation of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true, but the Reason is false.
If Assertion is false but the Reason is true.
Assertion: Colchicine arrests cell division and works as poison for cell division. Reason: It hinders nuclear membrane formation thus retarding cell division process.
If both Assertion and Reason are true and the Reason is a correct explanation of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true, but the Reason is false.
If Assertion is false but the Reason is true.
Assertion: The alleles coming from same parents tend to j enter the same gamete and have the tendency to inherit together. Reason: The alleles coming from same parents are linked together.
If both Assertion and Reason are true and the Reason is a correct explanation of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true, but the Reason is false.
If Assertion is false but the Reason is true.
Assertion: In a test cross F1, hybrids are crossed with homozygous recessive parents. Reason: It is called so, because it is used to test whether the individual showing dominant character is jhomozygous or heterozygous.
If both Assertion and Reason are true and the Reason is a correct explanation of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true, but the Reason is false.
If Assertion is false but the Reason is true.
The "A" arrow points to the:
adrenal gland
cortex
glomerulus
ureter
The structure labeled "B" is the :-
cortex
bowman's capsule
collecting duct
nephron
Which statement is NOT true of the set of reactions labeled “d”?
Most carbon is converted into RuBP
Carbon dioxide is “fixed” during the process
They are referred to as the Calvin Cycle
The process must occur in the presence of light
When an electron has been excited to a higher energy state, it can then drop back to the original level, re-emitting the light as fluorescence. When chlorophyll is extracted in solution, and a bright red or blue light is shown on it, the chlorophyll fluoresces brightly. However, when the chlorophyll is packaged inside chloroplasts and the red or blue light is turned on, there is no fluorescence. This most likely indicates that :-
green light must be used to make living cells fluoresce d.
the red and blue light waves are reflected by the chlorophyll membrane
excited electrons are transferred to electron acceptors in the chloroplast
chlorophyll in solution is a different molecule than chlorophyll in a chloroplast
Which of the following is correct?
All members of photolithotrophic autotrophs are also members of algae, but not all members of algae are members of photolithotrophic autotrophs
All members of algae are also members of photolithotrophic autotrophs, but not all members of photolithotrophic autotrophs are members of algae
All members of photolithotrophic autotrophs are members of algae, and all members of algae are members of photolithotrophic autotrophs
No member of photolithotrophic autotrophs is a member of algae
What happens in plants during vascularisation?
differentiation of procambium, formation of primary phloem followed by formation of primary xylem
formation of procambium, primary phloem and xylem simultaneously
differentiation of procambium followed by the formation of secondary xylem