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NEET Test Series-2021 to 2022 — Quiz
NEET Biology MCQS Mock Test Paper 44
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NEET Biology MCQS Mock Test Paper 44
1
 The chances of an offspring to have Down syndrome __________ with the mother’s age
A
 Decreases
B
 Increases
C
 is not influenced
D
 there is no correlation
2
 There are several variations of Down syndrome with Trisomy 21 accounting for close to 95% of all cases recorded. There is another form of the syndrome that occurs when a segment of the 21st chromosome detaches to attach itself to another chromosome. Its name is
A
Displacement
B
Transportation
C
 Translocation
D
Relocation
3
 This cell is the longest in the human body
A
Muscle cells
B
Nerve cells
C
 Bone cells
D
Gland cells
4
This tissue includes the blood tissue
A
Muscle tissue
B
Connective tissue
C
 Epithelial tissue
D
Nervous tissue
5
Which of this is/are examples of an organ containing a smooth muscle
A
Iris of eye
B
Bronchi only
C
Uterus only
D
All of the above
6
This structure of the plant cell is non-living
A
 Nucleus
B
cell wall
C
cytoplasm
D
Mitochondrion
7
This cell organelle does not contain DNA
A
Nucleus
B
 Mitochondria
C
Lysosomes
D
 Chloroplast
8
The main difference between human cheek cells and onion peel cells is
A
Presence of cell wall in onion peel cells
B
 Presence of mitochondria in onion peel cells
C
Absence of endoplasmic reticulum in cheek cells
D
Absence of the plasma membrane in cheek cells
9
This jellylike substance inside the plasma membrane in which all cell organelles are floating is
A
 Cytoplasm
B
 Tonoplasm
C
 Karyoplasm
D
Cell sap
10
The organelle serving as a primary packaging area for molecules that will be distributed throughout the cell is
A
Vacuole
B
Plastids
C
Mitochondria
D
 Golgi apparatus
11
Animal cells are interconnected by
A
Plasma membrane
B
 Cell wall
C
Desmosomes
D
Plasmodesmata
12
The Cell theory is not applicable to
A
Fungi
B
Algae
C
Virus
D
 Microbes
13
 In Swiss cheese, big holes are made by a
A
 bacterium producing methane gas
B
machine
C
fungus releasing a lot of gases while its metabolic activities
D
 bacterium producing large quantities of carbon dioxide
14
 During which stage of the purification of the sewage water are microbes used?
A
 Primary treatment
B
 Secondary treatment
C
Tertiary treatment
D
Both (1) and (2)
15
What does a high value of BOD(Biochemical Oxygen Demand) indicate?
A
 That water is pure
B
 that water is less polluted
C
that water is highly polluted
D
 that consumption of organic matter by microbes is higher in the water
16
This is a good producer of citric acid
A
Aspergillus
B
Clostridium
C
 Saccharomyces
D
 Pseudomonas
17
This is not an example of performing biological control of diseases/pests using microbes
A
 Trichoderma sp. against some plant pathogens
B
Nucleopolyhedrovirus against insects and other arthropods
C
 Ladybird beetle against aphids
D
 Bt-cotton to increase yield
18
This is chiefly produced by the activity of an anaerobic bacteria on sewage
A
 Laughing gas
B
Propane
C
Mustard gas
D
Marsh gas
19
For the production of ethanol, the most common substrate used in distilleries is
A
 Soya meal
B
Molasses
C
Ground gram
D
cornmeal
20
This is not a biofertilizer
A
Agrobacterium
B
Nostoc
C
Rhizobium
D
Mycorrhiza
21
 Carbon dioxide is not released in which of the following processes?
A
Lactate fermentation
B
Alcoholic fermentation
C
Aerobic respiration in animals
D
Aerobic respiration in plants
22
In the rainy season, doors get swelled up due to
A
Transpiration
B
Imbibition
C
Diffusion
D
Respiration
23
This statement regarding enzyme inhibition is correct
A
 non-competitive inhibitors often bind to the enzyme irreversibly
B
non-competitive inhibition of an enzyme can be overcome by adding a large amount of substrate
C
competitive inhibition is observed when substrate and inhibitor compete for the active site on enzyme
D
competitive inhibition is observed when substrate competes with an enzyme to bind to an inhibitor protein
24
In C3 and C4 plants, primary carboxylation takes place with the help of
A
 PEP carboxylse and pyruvate carboxylase
B
RuBP carboxylase and PEP carboxylase
C
PEP carboxylase and RuBP carboxylase
D
RuBP carboxylase and pyruvate carboxylase
25
Peroxisomes are involved in which type of reactions pertaining to plant photosynthesis?
A
Calvin Cycle
B
Glycolytic cycle
C
Glyoxylate cycle
D
Bacterial photosynthesis
26
The fundamental feature of Kranz Anatomy of C4 plants is
A
 Presence of agranal chloroplasts in bundle sheath cells and granal chloroplasts in mesophyll cells
B
Presence of granal chloroplasts in bundle sheath cells and agranal chloroplasts in mesophyll cells
C
Presence of chloroplasts in epidermal and mesophyll cells
D
 Presence of agranal chloroplasts in both mesophyll and bundle sheath cells
27
The statement which is incorrect with respect to enzyme action is
A
Addition of a lot of succinates does not reverse the inhibition of succinic dehydrogenase by malonate
B
 the substrate binds with the enzyme as its active site
C
 a non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate
D
malonate is a competitive inhibitor of succinic dehydrogenase
28
A phosphoglyceride is always composed of
A
only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate the group is also attached
B
 only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
C
 an unsaturated or saturated fatty acid esterified to a phosphate molecule to which a glycerol molecule is also attached
D
an unsaturated or saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
29
Macromolecule chitin is
A
 phosphorous containing polysaccharide
B
nitrogen containing polysaccharide
C
 sulphur containing polysaccharide
D
simple polysaccharide
30
This is a wrongly matched pair
A
Alcohol – Nitrogenase
B
Detergents – Lipase
C
Textile – Amylase
D
Fruit juice – Pectinase
31
The most abundant protein in the animal world is
A
Trypsin
B
Collagen
C
Haemoglobin
D
Insulin
32
 This amongst the following statements is incorrect. Human spermatozoa usually
A
moves with the help of their tails
B
 contains enzyme in their head which aids in penetration of the ovum
C
 are released in large numbers after a few days of abstinence
D
at a concentration of 1 million/ml of ejaculate will fertilize the ovum
33
Polar bodies are formed during
A
Oogenesis
B
 Spermatogenesis
C
Gametogenesis
D
Spermateleosis
34
In spermatogenesis, the phases of maturation involve
A
formation of spermatids from primary spermatocytes through meiosis
B
Growth of spermatogonia into primary spermatocytes
C
 formation of spermatogonia from gonocytes through mitosis
D
 formation of oogonia from spermatocytes through meiosis
35
This happens during spermatogenesis
A
Meiosis
B
 Mitosis
C
Meiosis and mitosis
D
 None of these
36
The actual genetic section of sperm is its
A
Acrosome
B
Tail
C
 Middle piece
D
Head
37
The process of spermatogenesis is induced by
A
TSH
B
 FSH
C
 MSH
D
 ACTH
38
The number of spermatozoa, a single primary spermatocyte finally produced in spermatogenesis is
A
2
B
4
C
6
D
8
39
The acrosome of sperm is formed from
A
Mitochondria of spermatid
B
 Golgi complex of spermatid
C
Nucleus of spermatid
D
Centrosome of spermatid
40
Which of the following cells is immortal?
A
Glomerular cells
B
 Somatic cells
C
Cells of pituitary
D
Germ cells
41
This molecule acts as molecular chaperones to assist the folding of proteins
A
Vitamins
B
 Carbohydrates
C
Amides
D
Lipids
42
Which of these is not a lipid?
A
Fats
B
 Oils
C
Proteins
D
 Waxes
43
The abundantly distributed enzyme in germinating seeds and adipocytes is
A
Lipase
B
 Proteases
C
Cellulase
D
Nuclease
44
Beta-oxidation of fatty acids occurs in
A
Peroxisome
B
Peroxisome and Mitochondria
C
Mitochondria
D
Peroxisome, Mitochindria and ER
45
 An example of ____________ is Carnauba wax
A
Soft wax
B
Liquid wax
C
Hard wax
D
Archaebacterial wax
46
 In fats, the number of OH groups can be expressed as
A
 Reichert-Meissil number
B
Polenske number
C
 Iodine number
D
Acetyl number
47
 Rancidity of lipids of lipid-rich foodstuff is because of
A
 Reduction of fatty acids
B
 Hydrogenation of unsaturated fatty acids
C
 Dehydrogenation of saturated fatty acids
D
Oxidation of fatty acids
48
This is an example of derived lipids
A
Terpenes
B
Steroids
C
 Carotenoids
D
 All of the above
49
The degree of unsaturation of lipids can be measured as
A
Iodine number
B
 Saponification number
C
 Reichert Meissel number
D
 Polenske number
50
The specific gravity of lipid is
A
1.5
B
1
C
0.8
D
 0.2
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