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NEET Test Series-2021 to 2022 — Quiz
NEET Biology MCQS Mock Test Paper 16
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NEET Biology MCQS Mock Test Paper 16
1
In this type of DNA replication; of the two newly formed molecules; one is purely a new one and the other is an old one
A
dispersive
B
conservative
C
 semiconservative
D
both (b) and (c)
2
The process of DNA replication is affected by an enzyme known as
A
Mutase
B
Ligase
C
 Polymerase I
D
Ribonuclease
3
A DNA molecule in which both strands have radioactive thymidine is permitted to replicate in an environment that contains non-radioactive thymidine. What is the right number of DNA molecules which possess some radioactive thymidine post three duplications?
A
one such molecule
B
two such molecules
C
four such molecules
D
eight such molecules
4
If the DNA strand has nitrogenous base sequence ATTGCC; the mRNA will have?
A
ATTGCA
B
UGGACC
C
UAACGG
D
ATCGCC
5
 The type of coiling in DNA is
A
Zig-zag
B
Left-handed
C
Opposite
D
Right-handed
6
 In DNA; the enzyme which breaks the H2 bonds is
A
Ligase
B
Helicase
C
 Topoisomerase
D
Polymerase
7
The total DNA comprises what amount of cytoplasmic DNA in cells?
A
95-99%
B
65-75%
C
45-50%
D
1-5%
8
 The bases are held together in a DNA double helix by hydrogen bonds. These bonds are
A
Ionic bonds
B
Covalent bonds
C
Non-covalent bonds
D
Van der Waals forces
9
This factor contributes to the carbon cycle
A
fossil fuel combustion
B
respiration
C
photosynthesis
D
all of these
10
The source of carbon to plants in the carbon cycle is
A
 fossil fuels
B
carbonate rocks
C
atmospheric carbon dioxide
D
all of the above
11
The role of bacteria in the carbon cycle is
A
Breakdown of organic compounds
B
 Chemosynthesis
C
Photosynthesis
D
Assimilation of nitrogen compounds
12
In the carbon cycle; the human body returns carbon to the atmosphere through this way:
A
 formation of glucose
B
waste products
C
 photosynthesis
D
cellular respiration
13
 Respiration and photosynthesis are central to this process
A
 nitrogen cycle
B
phosphorous cycle
C
carbon cycle
D
sulphur cycle
14
The difference between the phosphorous cycle and carbon cycle lies in the fact that
A
the phosphorous cycle does not include a gaseous phase but the carbon cycle does
B
phosphorous does not enter living entities but carbon enters
C
the phosphorous cycle includes a solid phase; the carbon cycle does not
D
primary reservoir of the phosphorous cycle is the atmosphere; but rocks are the primary reservoirs for carbon cycle
15
 Most of the global warming is due to the perturbation of which of these cycles?
A
 Global nitrogen cycle
B
Global carbon cycle
C
Global water cycle
D
 All of these cycles equally contribute
16
This carbon isotope is radioactive and very rare
A
Carbon – 11
B
Carbon – 12
C
Carbon – 13
D
Carbon – 14
17
By this method; the majority of carbon moves from the lithosphere to the atmosphere
A
erosion
B
 deposition
C
weathering
D
 fossil fuel burning
18
These entities sequester most carbon from the atmosphere
A
Plants
B
Archaea
C
Bacteria
D
Insects
19
The stimulation of a muscle fibre by a motor neuron occurs at the
A
 myofibril
B
 transverse tubules
C
neuromuscular junction
D
sarcoplasmic reticulum
20
An injury sustained by the hypothalamus is most likely to interrupt
A
coordination during locomotion
B
short term memory
C
regulation of body temperature
D
 executive function like decision making
21
 In humans; the Alzheimer disease is linked with the deficiency of
A
acetylcholine
B
 dopamine
C
glutamic acid
D
Gamma Amino Butyric Acid (GABA)
22
What is the person with these symptoms suffering from? Outbursts of emotions; unpredictable moods; quarrelsome behaviour; conflicts with others
A
Mood disorders
B
 Addictive diroders
C
 Schizoprenia
D
Borderline personality disorder (BPD)
23
 Even after the brain of a frog has been crushed; it still responds to a pinch on the leg by drawing it away. This act is an example of
A
 Conditioned reflex
B
Simple reflex
C
Automated motor response
D
Neurotransmitter induced response
24
 Which of these functions will be affected if the medulla oblongata is damaged?
A
Vision
B
 Thermoregulation
C
Memory
D
Tactile sensation – response when prickled with a needle
25
This part of the human brain is also known as the emotional brain
A
Epithalamus
B
 Limbic system
C
Broca’s area
D
 Corpus callosum
26
This is the outermost cranial appendage
A
Dura mater
B
 Pia mater
C
Skull
D
Arachnoid
27
This cranial meninges is in close proximity of the brain tissue
A
Dura mater
B
Pia mater
C
 Arachnoid
D
 Skull tissue
28
This statement is not associated with midbrain
A
the ventral portion of the midbrain is composed of mainly four; round swellings known as corpora quadrigemina
B
located between thalamus of the forebrain and pons of the hindbrain
C
the canal called cerebral aqueduct passes through the midbrain
D
hindbrain and midbrain constitute the brain stem
29
Entities exhibiting properties of both non-living and living are:
A
diatoms
B
lichens
C
bacteria
D
 viruses
30
This has a smaller intestine
A
 carnivore
B
herbivore
C
both (a) and (b)
D
 none of the above
31
Which of these substances is transported by the blood plasma?
A
Carbon dioxide
B
Nitrogenous waste
C
Food
D
All of the above
32
Here; the maximum exchange of material between blood and surrounding cells takes place
A
 Veins
B
Heart
C
Capillaries
D
Arteries
33
In photosynthesis; the chlorophyll is used for
A
 No function
B
reduction of carbon dioxide
C
breaking down the water molecule
D
absorbing light
34
The enzymes found in intestinal juice finally convert
A
fats into fatty acids and glycerol
B
proteins to amino acids
C
complex carbohydrates into glucose
D
all of these
35
The respiratory pigment in human beings is
A
insulin
B
enzymes
C
haemoglobin
D
none of these
36
This structure guards the opening of the hepatopancreatic duct into the duodenum
A
 Pyloric sphincter
B
Sphincter of Oddi
C
 Semilunar valve
D
Ileocaecal valve
37
 Pick the correct one
A
Serum = Blood + Fibrinogen
B
Lymph = Plasma + RBC + WBC
C
Plasma = Blood – Lymphocytes
D
 Blood = Plasma + RBC + WBC
38
Reduction of blood pH will
A
reduces the rate of heartbeat
B
reduces the blood supply to the brain
C
releases bicarbonate ions by the liver
D
decrease the affinity of haemoglobin with oxygen
39
 In which of the following groups would you place a plant that produces spores; lacks seeds and has vascular tissue?
A
 Bryophyte
B
Algae
C
Pteridophyte
D
Gymnosperm
40
 In Pteridophytes; the dominant generation is
A
 gametophytic
B
haploid
C
 diploid
D
 triploid
41
Reduction division in pteridophytes occurs in
A
 Prothallus is formed
B
Gametes are formed
C
 spores are formed
D
sex organs are formed
42
Prothallus represents
A
 sporophytic phase in a fern
B
gametophytic phase in a fern
C
 sporophytic phase in a gymnosperm
D
gametophytic phase in a gymnosperm
43
Pteridophytes and Bryophytes differ in having
A
Spermatozoids
B
Archegonia
C
 Separate gametophytes
D
conducting system
44
 Which of the following is deemed to be vital in the development of seed habit?
A
 Heterospory
B
Dependant sporophyte
C
Free-living gametophyte
D
 Haplontic life cycle
45
Sporophytic and gametophytic phases are independent in
A
Bryophytes
B
Pteridophytes
C
Phaeophytes
D
Gymnosperms
46
‘Club moss’ belongs to
A
 Fungi
B
 Algae
C
Bryophyta
D
 Pteridophyta
47
Phloem is without ___________ in pteridophytes
A
Bast fibres
B
 Companion cells
C
Phloem parenchyma
D
sieve cells
48
This group does not have seeds but has vascular tissues and produces spores
A
Pteridophyta
B
Bryophyta
C
 Angiosperms
D
Gymnosperms
49
Mostly; the flesh of fruit is made of
A
 Collenchyma
B
Parenchyma
C
Meristem
D
Schlerids
50
Prosenchyma is a type of
A
 Chlorenchyma
B
Collenchyma
C
Sclerenchyma
D
 Parenchyma
51
The tissue where cells are thin-walled; living; isodiametric along with intercellular spaces is
A
Arenchyma
B
Prosenchyma
C
 Collenchyma
D
Parenchyma
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