MCQ’S
FOR NEET
101.
What would be the number of chromosomes in the cells of the aleurone layer in a
plant
species
with 8chromosomes in its synergids ?
1)
16
2)
24
3)
32
4)
8
102.
Pineapple (annanas) fruit develops from :
1)
a unilocular polycarpillary flower
2)
a multipistillate syncarpous flower
3)
a cluster of compactly borne flowers on a common axis
4)
a multilocular monocarpillary flower
103.
Golden rice is a promising transgenic crop. When released for cultivation, it
will help in :
1)
alleviation of vitamin-A deficiency
2)
pest resistance
3)
herbicide tolerance
4)
producing a petrol-like fuel from rice
104.
Parthenocarpic tomato fruits can be produced by :
1)
removing androecium of flowers before pollen grains are released
2)
treating the plants with low concentrations of gibberellic acid and auxins
3)
raising the plants from vernalized seeds
4)
treating the plants with phenylmercuric acetate
105.
How does pruning help in making the hedge dense ?
1)
It induces the differentiation of new shoots from the rootstock
2)
It frees axillary buds from apical dominance
3)
The apical shoot grows faster after pruning
4)
It releases wound hormones
106.
The 'blue baby' syndrome results from :
1)
excess fo chloride
2)
methaemoglobin
3)
excess of dissolved oxygen
4)
excess of TDS (Total Dissolved Solids)
107.
Praying mentis is a good example of :
1)
mullerian mimicry
2)
warning colouration
3)
social insects
4)
camouflage
108.
Which one of the following statements is correct ?
1)
Neurons regulate endocrine activity, but not vice versa
2)
Endocrine glands regulate neural activity and nervous system regulates
endocrine
glands
3)
Neither hormones control neural activity nor the neurons control endocrine
activity
4)
Endocrine glands regulate neural activity, but not vice versa
109.
Examination of blood of a person suspected of having anaemia, shows large,
immature,
nucleated
erythrocytes without haemoglobin. Supplementing his diet with which of the
following,
is likely to alleviate his symptoms ?
1)
Thiamine
2)
Folic acid and cobalamine
3)
Riboflavin
4)
Iron compounds
110.
Farmers in a particular region were concerned that pre-mature yellowing of
leaves of a
pulse
crop might cause decrease in the yield.Which treatment could be most beneficial
to
obtain
maximum seed yield ?
1)
Frequent irrigation of the crop
2)
Treatment of the paints with cytokinins along with a small dose of nitrogenous
fertilizer
3)
Removal of all yellow leaves and spraying the remaining green leaves with 2, 4,
5-
trichlorophenoxy
acetic acid
4)
Application of iron and magnesium to promote synthesis of chlorophyll
111.
In which of the following fruits is the edible part the aril ?
1)
Custard apple
2)
Pomegranate
3)
Orange
4)
Litchi
112.
Which one of the following aminoacids was not found to be synthesized in
Miller's
experiment
?
1)
Glycine
2)
Aspartic acid
3)
Glutamic acid
4)
Alanine
113.
Crop plants grown in monoculture are :
1)
low in yield
2)
free from intraspecific competition
3)
characterised by poor root system
4)
highly prone to pests
114.
Montreal protocol which calls for appropriate action to protect the ozone layer
from
human
activities was passed in the year :
1)
1986
2)
1987
3)
1988
4)
1985
115.
The formula for exponential population growth is :
1)
dt/dN = rN
2)
dN/rN = dt
3)
rN/dN = dt
4)
dN/dt = rN
116.
Which one of the following is not used for construction of ecological pyramids
?
1)
Dry weight
2)
Number of individuals
3)
Rate of energy flow
4)
Fresh weight
117.
Niche overlap indicates :
1)
active co-operation between two species
2)
two different parasites on the same host
3)
sharing of one ormore resources between the two species
4)
mutualism between two species
118.
In photosystem-I, the first electron acceptor is :
1)
ferredoxin
2)
cytochrome
3)
plastocyanin
4)
an iron-sulphur protein
119.
Treatment of seed at low temperature undermoist conditions to break its
dormancy is
called
:
1)
scarification
2)
vernalization
3)
chelation
4)
stratification
120.
Which one of the following is the most suitable, medium for culture of
Drosophila
melanogaster
?
1)
Moist bread
2)
Agar agar
3)
Ripe banana
4)
Cow dung
121.
Which one of the following is not included under in situ conservation ?
1)
Sanctuary
2)
Botanical garden
3)
Biosphere reserve
4)
National park
122.
Which antibiotic inhibits interaction between t-RNA and m-RNA during bacterial
protein
synthesis
?
1)
Erythromycin
2)
Neomycin
3)
Streptomycin
4)
Tetracycline
123.
Phenotype of an organism is the result of :
1)
mutations and linkages
2)
cytoplasmic effects and nutrition
3)
environmental changes and sexual dimorphism
4)
genotype and environment interactions
124.
Photochemical smog pollution does not contain :
1)
ozone
2)
nitrogen dioxide
3)
carbon dioxide
4)
PAN (Peroxy Acyl Nitrate)
125.
Moss peat is used as a packing material for sending flowers and live plants to
distant
places
because :
1)
it is easily available
2)
it is hygroscopic
3)
it reduces transpiration
4)
it serves as a disinfectant
126.
A common structural feature of vessel elements and sieve tube elements is :
1)
thick secondary walls
2)
pores on lateral walls
3)
presence of P-protein
4)
enucleate condition
127.
The thalloid body of a slime mould (Myxomycetes) is known as :
1)
protonema
2)
Plasmodium
3)
fruiting body
4)
mycelium
128.
In which mode of inheritance do you expect more maternal influence among the
off
spring
?
1)
Autosomal
2)
Cytoplasmic
3)
Y-linked
4)
X-linked
129.
What type of placentation is seen in sweet pea ?
1)
Basal
2)
Axile
3)
Free central
4)
Marginal
130.
Long filamentous threads protruding at the end of a young cob of maize are :
1)
anthers
2)
styles
3)
ovaries
4)
hairs
131.
Conifers differ from grasses in the :
1)
production of seeds from ovules
2)
lack of xylem tracheids
3)
absence of pollen tubes
4)
formation of endosperm before fertilization
132.
How many different kinds of gametes will be produced by a plant having the
genotype
AABbCC
?
1)
Three
2)
Four
3)
Nine
4)
Two
133.
In maize, hybrid vigour is exploited by :
1)
bombarding the protoplast with DNA
2)
crossing of two inbreed parental lines
3)
harvesting seeds from the most productive plants
4)
inducing mutations
134.
Which of the following statements regarding mitochondrial membrane is not
correct ?
1)
The outer membrane is permeable to all kinds of molecules
2)
The enzymes of the electron transfer chain are embedded in the outer membrane
3)
The inner membrane is highly convoluted forming a series of infoldings
4)
The outer membrane resembles a sieve
135.
Amino acid sequence, in protein synthesis is decided by the sequence of :
1)
t-RNA
2)
m-RNA
3)
c-DNA
4)
r-RNA
136.
How many ATP molecules could maximally be generated from one molecule of
glucose, if
the
complete oxidation of one mole of glucose to CO2 and H2O
yields 686 kcal and the
useful
chemical energy available in the high energy phosphate bond of one mole of ATP
is
12 kcal ?
1)
Two
2)
Thirty
3)
Fifty seven
4)
One
137.
An organic substance bound to an enzyme and essential for its acvity is called
:
1)
coenzyme
2)
holoenzyme
3)
apoenzyme
4)
isoenzyme
138.
Bowman's glands are found in :
1)
olfactory epithelium
2)
external auditory canal
3)
cortical nephrons only
4)
juxtamedullary nephrons
139.
The bacterium (Clostridium botulinum) that causes botulism is :
1)
a facultative anaerobe
2)
an obligate anaerobe
3)
a facultative aerobe
4)
an obligate aerobe
140.
Which one of the following is the correctly matched pair of an endangered
animal and a National Park ?
1)
Lion — Corbett National Park
2)
Rhinoceros — Kaziranga National Park
3)
Wild ass — Dudhwa National Park
4)
Great Indian bustard —Keoladeo National Park
141.
A person showing upredictable moods, outbursts of emotion, quarrelsome
behaviour and
conflicts
with others is suffering from :
1)
schizophrenia
2)
borderline personality disorder (BPD)
3)
mood disorders
4)
addictive disorders
142.
Sulphur is an important nutrient for optimum growth and productivity in :
1)
pulse crops
2)
cereals
3)
fibre crops
4)
oilseed crops
143.
Pentamerous, actinomorphic flowers, bicarpillary ovary with oblique septa, and
fruit a
capsule
or berry, are characteristic features of :
1)
Asteraceae
2)
Brassicaceae
3)
Solanaceae
4)
Liliaceae
144.
In a moss the sporophyte :
1)
is partially parasitic on the gametophyte
2)
produces gametes that give rise to the gametophyte
3)
arises from a spore produced from the gametophyte
4)
manufactures food for itself, as well as for the gametophyte
145.
Curing of tea leaves is brought about by the activity of :
1)
bacteria
2)
mycorrhiza
3)
viruses
4)
fungi
146.
People living at sea level have around 5 million RBC per cubic millimeter of
their blood
whereas
those living at an altitude of 5400 metres have around 8 million. This is
because
at
high altitude :
1)
people get pollution-free air to breathe and more oxygen is available
2)
atmospheric O2
level
is less and hence more RBCs are needed to absorb the required
amount
of O2
to
survive
3)
there is more UV radiation which enhances RBC production
4)
people eat more nutritive food, therefore more RBCs are formed
147.
An important evidence in favour of organic evolution is the occurrence of :
1)
homologous and vestigial organs
2)
analogous and vestigial organs
3)
homologous organs only
4)
homologous and analogous organs
148.
Which one of the following is not a living fossil ?
1)
King crab
2)
Sphenodon
3)
Archaeopteryx
4)
Peripatus
149.
Annual migration does not occur in the case of :
1)
salmon
2)
Siberian crane
3)
salamander
4)
arctic tern
150.
A major breakthrough in the studies of cells came with the development of
electron
microscope.
This is because :
1)
the resolution power of the electron microscope is much higher than that of the
light
microscope
2)
the resolving power of the electron microscope is 200 – 350 nm as compared to
0.1 –
0.2
nm for the light microscope
3)
electron beam can pass through thick materials, whereas light microscopy
requires
thin
sections
4)
the electron microscope is more powerful than the light microscope as it uses a
beam
of
electrons which has wavelength much longer than that of photons
151.
Which one of the following is a matching set of a phylum and its three examples
?
1)
Cnidaria — Bonellia, Physalia, Aurelia
2)
Platyhelminthes — Planaria, Schistosoma, Enterobius
3)
Mollusca — Loligo, Teredo, Octopus
4)
Porifera — Spongilla, Euplectella, pennatula
152.
Metameric segmentation is the characteristic of :
1)
Platyhelminthes and Arthropoda
2)
Echinodermata and Annelida
3)
Annelida and Arthropoda
4)
Mollusca and Chordata
153.
Which of the following pairs of an animal and a plant represents endangered
organisms
in
India ?
1)
Bentinckia nicobarica and red panda
2)
Tamarind and rhesus monkey
3)
Cinchona and leopard
4)
Banyan and black buck
154.
Jurassic period of the Mesozoic era is characterised by :
1)
gymnosperms are dominant plants and first birds appear
2)
radiation of reptiles and origin ofmammal like reptiles
3)
dinosaurs become extinct and angiosperms appear
4)
flowering plants and first dinosaurs appear
155.
What is common about Trypanosoma, Noctiluca, Monocystis and Giardia ?
1)
These are all unicellular protists
2)
They have flagella
3)
They produce spores
4)
These are all parasites
156.
Which of the following statements regarding cilia is not correct ?
1)
The organized beating of cilia is controlled by fluxes of Ca2+ across
the membrane
2)
Cilia are hair-like cellular appendages
3)
Microtubules of cilia are composed of tubulin
4)
Cilia contain an outer ring of nine doublet microtubules surrounding two single
microtubules
157.
Microbes found to be very useful in genetic engineering are :
1)
Escherichia coli and Agrobacterium tumefaciens
2)
Vibrio cholerae and a tailed bacteriophage
3)
Diplococcus sp. and Pseudomonas sp.
4)
Crown gall bacterium and Caenorhabditis elegans
158.
Which of the following environmental conditions are essential for optimum
growth of
Mucor
on a piece of bread ?
A.
Temperature of about 25°C
B.
Temperature of about 5°C
C.
Relative humidity of about 5%
D.
Relative humidity of about 95%
E.
A shady place
F.
A brightly illuminated place
Choose
the answer from the following options :
1)
A, C and E only
2)
A, D and E only
3)
B, D and E only
4)
B, C and F only
159.
Evolutionary history of an organism is known as :
1)
Phylogeny
2)
Ancestry
3)
Paleontology
4)
Ontogeny
160.
Which of the following is considered a hot-spot of biodiversity in India ?
1)
Western ghats
2)
Indo-Gangetic plain
3)
Eastern ghats
4)
Aravalli hills
161.
During photorespiration, the oxygen consuming reaction(s) occur in :
1)
stroma of chloroplasts and mitochondria
2)
stroma of chloroplasts and peroxisomes
3)
grana of chloroplasts and peroxisomes
4)
stroma of chloroplasts
162.
Which one of the following is an example of polygenic inheritance ?
1)
Flower colour in Mirabilis jalapa
2)
Production of male honey bee
3)
Pod shape in garden pea
4)
Skin colour in humans
163.
Which one of the following not act as a neurotransmitter ?
1)
Acetylcholine
2)
Epinephrine
3)
Nor epinephrine
4)
Cortisone
164.
Sertoli cells are regulated by the pituitary hormone known as :
1)
FSH
2)
GH
3)
Prolactin
4)
LH
165.
A steroid hormone which regulates glucose metabolism is :
1)
cortisol
2)
corticosterone
3)
11-deoxycorticosterone
4)
cortisone
166.
The contractile protein of skeletal muscle involving ATPase activity is :
1)
tropomyosin
2)
myosin
3)
α-actinin
4)
troponin
167.
Which one of the following is not a second messenger in hormone action ?
1)
cGMP
2)
Calcium
3)
Sodium
4)
cAMP
168.
In Mendel's experiments with garden pea, round seed shape (RR) was dominant
over
wrinkled
seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy).What are the expected phenotypes in the F 2 generation
of the cross RRYY x rryy ?
1)
Only round seeds with green cotyledons
2)
Only wrinkled seeds with yellow cotyledons
3)
Only wrinkled seeds with green cotyledons
4)
Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons
169.
One gene – one enzyme hypothesis was postulated by :
1)
R. Franklin
2)
Hershey and Chase
3)
A. Garrod
4)
Beadle and Tatum
170.
One turn of the helix in a B-form DNA is approximately :
1)
20 nm
2)
0.34 nm
3)
3.4 nm
4)
2 nm
171.
Test cross involves :
1)
crossing between two genotypes with recessive trait
2)
crossing between two F 1
hybrids
3)
crossing the F 1
hybrid
with a double recessive genotype
4)
crossing between two genotypes with dominant trait
172.
Antiparallel strands of a DNA molecule means that :
1)
one strand turns anti-clockwise
2)
the phosphate groups of two DNA strands, at their ends, share the same position
3)
the phosphate groups at thestart of two DNA strands are in opposite position
(pole)
4)
one strand turns clockwise
173.
Areolar connective tissue joins :
1)
fat body with muscles
2)
integument with muscles
3)
bones with muscles
4)
bones with bones
174.
Mast cells secrete :
1)
hippurin
2)
myoglobin
3)
histamine
4)
haemoglobin
175.
If a colourblind woman marries a normal visioned man, their sons will be :
1)
all normal visioned
2)
one-half colourblind and one-half normal
3)
three-fourths colourbling and one-fourth normal
4)
all colourblind
176.
Cri-du-chat syndrome in humans is caused by the :
1)
fertilization of an XX egg by a normal Y-bearing sperm
2)
loss of half of the short arm of chromosome 5
3)
loss of half of the long arm of chromosome 5
4)
trisomy of 21st chromosome
177.
Restriction endonuclease :
1)
cuts the DNA molecule randomly
2)
cuts the DNA molecule at specific sites
3)
restricts the synthesis of DNA inside the nucleus
4)
synthesizes DNA
178.
Antibodies in our body are complex :
1)
lipoproteins
2)
steroids
3)
prostaglandins
4)
glycoproteins
179.
Limit of BOD prescribed by Central Pollution Control Board for the discharge of
industrial
and
municipal waste water into natural surface water, is :
1)
< 3.0 ppm
2)
< 10 ppm
3)
< 100 ppm
4)
< 30 ppm
180.
Earthworms are :
1)
ureotelic when plenty of water is available
2)
uricotelic when plenty of water is available
3)
uricotelic under conditions of water scarcity
4)
ammonotelic when plenty of water is available
181.
Which of the following is an accumulation and release centre of neurohormones ?
1)
Posterior pituitary lobe
2)
Intermediate lobe of the pituitary
3)
Hypothalamus
4)
Anterior pituitary lobe
182.
Withdrawal of which of the following hormones is the immediate cause of
menstruation ?
1)
Eastrogens
2)
FSH
3)
FSH-RH
4)
Progesterone
183.
Which one of the following statements is incorrect ?
1)
The residual air in lungs slightly decreases the efficiency of respiration in
mammals
2)
The presence of non-respiratory air sacs, increases the efficiency of
respiration in
birds
3)
In insects, circulating body fluids serve to distribute oxygen to tissues
4)
The principle of countercurrent flow facilitates efficient respiration in gills
of fishes
184.
Which one of the following has an open circulatory system ?
1)
Pheretima
2)
Periplaneta
3)
Hirudinaria
4)
Octopus
185.
Which hormone causes dilation of blood vessels, increased oxygen consumption
and
glycogenolysis
?
1)
ACTH
2)
Insulin
3)
Adrenalin
4)
Glucagon
186.
The causative agent ofmad-cow disease is a :
1)
bacterium
2)
prion
3)
worm
4)
virus
187.
The translocation of organic solutes in sieve tube members is supported by :
1)
root pressure and transpiration pull
2)
P-proteins
3)
mass flow involving a carrier and ATP
4)
cytoplasmic streaming
188.
Biradial symmetry and lack of cnidoblasts are the characteristics of :
1)
Starfish and sea anemone
2)
Ctenoplana and Beroe
3)
Aurelia and Paramecium
4)
Hydra and starfish
189.
The arrangement of the nuclei in a normal embryo sac in the dicot plants is :
1)
2 + 4 + 2
2)
3 + 2 + 3
3)
2 + 3 + 3
4)
3 + 3 + 2
190.
An enzyme that can stimulate germination of barley seeds is :
1)
α-amylase
2)
lipase
3)
protease
4)
invertase
191.
In a cereal grain the single cotyledon of embryo is represented by :
1)
coleorhiza
2)
scutellum
3)
prophyll
4)
coleoptile
192.
The majority of carbon dioxide produced by our body cells is transported to the
lungs :
1)
dissolved in the blood
2)
as bircarbonates
3)
as carbonates
4)
attached to haemoglobin
193.
Triticale, the first man-made cereal crop, has been obtained by crossing wheat
with :
1)
rye
2)
pearl millet
3)
sugarcane
4)
barley
194.
In order to obtain virus-free plants through tissue culture the best method is
:
1)
protoplast culture
2)
embryo rescue
3)
anther culture
4)
meristem culture
195.
HIV that causes AIDS, first starts destroying :
1)
B-lymphocytes
2)
leucocytes
3)
thrombocytes
4)
helper T-lymphocytes
196.
In which one of the following sets of animals do all the four give birth to young
ones ?
1)
Lion, bat, whale, ostrich
2)
Platypus, penguin, bat, hippopotamus
3)
Shrew, bat, cat, kiwi
4)
Kangaroo, hedgehog, dolphin, loris
197.
Sickle cell anaemia has not been eliminated from the African population because
:
1)
it is controlled by recessive genes
2)
it is not a fatal disease
3)
it provides immunity against malaria
4)
it is controlled by dominant genes
198.
Two common characters found in centipede, cockroach and crab are :
1)
compound eyes and anal cerci
2)
jointed legs and chitinous exoskeleton
3)
green gland and tracheae
4)
book lungs and antennae
199.
Both sickle cell anaemia and Huntington's chorea are :
1)
bacteria-related diseases
2)
congenital disorders
3)
pollutant-induced disorders
4)
virus-related diseases
200.
Angiotensinogen is a protein produced and secreted by :
1)
macula densa cells
2)
endothelial cells (cells lining the blood vessels)
3)
liver cells
4)
juxtaglomerular (JG) cells
