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NEET Test Series-2021 to 2022 — Quiz
NEET Biology MCQS Mock Test Paper 17
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NEET Biology MCQS Mock Test Paper 17
1
DNA fingerprinting recognizes the differences in
A
satellite DNA
B
bulk DNA
C
 Repetitive DNA
D
 both (a) and (c)
2
This force can stabilize a DNA double-helixÂ
A
 Hydrophilic sugar-phosphate groups are found on the exterior of the helix where interaction with water occurs
B
Hydrophobic bases are present in the interior of the helix; each base-pair is stabilized by the same number of hydrogen bonds
C
covalent base stacking interactions may take place between neighbouring bases within the same strand in the helix
D
 non-covalent N-glycosidic bonds may form between nitrogenous bases in opposite strands in the helix
3
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)
4
 The process of DNA replication is affected by an enzyme known as
A
Mutase
B
Ligase
C
Polymerase I
D
Ribonuclease
5
 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
6
If the DNA strand has nitrogenous base sequence ATTGCC; the mRNA will have?
A
 ATTGCA
B
UGGACC
C
UAACGG
D
ATCGCC
7
The type of coiling in DNA is
A
Zig-zag
B
 Left-handed
C
 Opposite
D
 Right-handed
8
In DNA; the enzyme which breaks the H2Â bonds is
A
 Ligase
B
 Helicase
C
Topoisomerase
D
Polymerase
9
 The total DNA comprises what amount of cytoplasmic DNA in cells?
A
 95-99%
B
65-75%
C
45-50%
D
1-5%
10
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
11
This factor contributes to the carbon cycle
A
fossil fuel combustion
B
respiration
C
photosynthesis
D
all of these
12
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
13
The role of bacteria in the carbon cycle is
A
Breakdown of organic compounds
B
Chemosynthesis
C
 Photosynthesis
D
Assimilation of nitrogen compounds
14
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
15
Respiration and photosynthesis are central to this process
A
 nitrogen cycle
B
phosphorous cycle
C
 carbon cycle
D
sulphur cycle
16
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
17
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
18
This carbon isotope is radioactive and very rare
A
Carbon – 11
B
Carbon – 12
C
Carbon – 13
D
Carbon – 14
19
By this method; the majority of carbon moves from the lithosphere to the atmosphere
A
 erosion
B
 deposition
C
weathering
D
fossil fuel burning
20
These entities sequester most carbon from the atmosphere
A
Plants
B
 Archaea
C
Bacteria
D
Insects
21
The stimulation of a muscle fibre by a motor neuron occurs at the
A
myofibril
B
 transverse tubules
C
neuromuscular junction
D
sarcoplasmic reticulum
22
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
23
In humans; the Alzheimer disease is linked with the deficiency of
A
acetylcholine
B
dopamine
C
glutamic acid
D
Gamma Amino Butyric Acid (GABA)
24
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)
25
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
26
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
27
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
28
 This is the outermost cranial appendage
A
 Dura mater
B
 Pia mater
C
 Skull
D
Arachnoid
29
This cranial meninges is in close proximity of the brain tissue
A
Dura mater
B
Pia mater
C
Arachnoid
D
Skull tissue
30
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
31
 Entities exhibiting properties of both non-living and living are:
A
 diatoms
B
 lichens
C
 bacteria
D
viruses
32
This has a smaller intestine
A
 carnivore
B
herbivore
C
 both (a) and (b)
D
none of the above
33
 Which of these substances is transported by the blood plasma?
A
Carbon dioxide
B
Nitrogenous waste
C
Food
D
All of the above
34
Here; the maximum exchange of material between blood and surrounding cells takes place
A
Veins
B
Heart
C
 Capillaries
D
Arteries
35
In photosynthesis; the chlorophyll is used for
A
No function
B
reduction of carbon dioxide
C
breaking down the water molecule
D
absorbing light
36
 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
37
The respiratory pigment in human beings is
A
 insulin
B
enzymes
C
 haemoglobin
D
none of these
38
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
39
Pick the correct one
A
 Serum = Blood + Fibrinogen
B
 Lymph = Plasma + RBC + WBC
C
 Plasma = Blood – Lymphocytes
D
Blood = Plasma + RBC + WBC
40
 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
41
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
42
In Pteridophytes; the dominant generation is
A
 gametophytic
B
haploid
C
diploid
D
triploid
43
 Reduction division in pteridophytes occurs in
A
Prothallus is formed
B
Gametes are formed
C
spores are formed
D
sex organs are formed
44
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
45
 Pteridophytes and Bryophytes differ in having
A
Spermatozoids
B
Archegonia
C
Separate gametophytes
D
conducting system
46
 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
47
 Sporophytic and gametophytic phases are independent in
A
Bryophytes
B
Pteridophytes
C
Phaeophytes
D
Gymnosperms
48
 ‘Club moss’ belongs to
A
Fungi
B
Algae
C
Bryophyta
D
Pteridophyta
49
Phloem is without ___________ in pteridophytes
A
Bast fibres
B
Companion cells
C
Phloem parenchyma
D
sieve cells
50
This group does not have seeds but has vascular tissues and produces spores
A
 Pteridophyta
B
Bryophyta
C
 Angiosperms
D
 Gymnosperms
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