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NEET Biology MCQS Mock Test Paper 45
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NEET Biology MCQS Mock Test Paper 45
1
The Atoms of solid Ar are held together by
A
 Van der Waals forces
B
Hydrogen bonds
C
Ionic bonds
D
Hydrophobic forces
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✅ Correct Answer: 1
2
 Which of the following has the weakest bond?
A
 Ice
B
 Diamond
C
KCl
D
 Neon
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✅ Correct Answer: 1
3
Which of the following is the weakest bond?
A
Ionic bonds
B
Metallic bonds
C
Covalent bonds
D
Van der Waals forces
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✅ Correct Answer: 4
4
Which of the following has both covalent and ionic bonds?
A
 NaOH
B
 KCl
C
CH4
D
SO2
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✅ Correct Answer: 1
5
In a crystal, covalent molecules are held together by
A
Dipole-dipole attraction
B
 Hydrogen bonds
C
Van der Waals attraction
D
 Electrostatic attraction
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✅ Correct Answer: 3
6
Which of the compounds shows the highest lattice energy?
A
CsF
B
 KF
C
 RbF
D
 NaF
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✅ Correct Answer: 4
7
Metallic bonds do not have
A
Highly directed bonds
B
 Mobile valence electrons
C
 Delocalised electrons
D
Overlapping valence orbitals
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✅ Correct Answer: 1
8
 Formation of a chemical bond results in
A
Increase in energy
B
 Decrease in energy
C
Both
D
None of the above
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✅ Correct Answer: 2
9
 Small discrete molecules are present in which of the substances?
A
Copper
B
 CO
C
Dry ice
D
Graphite
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✅ Correct Answer: 3
10
Particles in an ionic crystals are held together by
A
Nuclear forces
B
Electrons
C
Covalent bonds
D
Electrostatic forces
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✅ Correct Answer: 4
11
Humans have ________ joint between sternum and ribs
A
 gliding
B
angular
C
cartilaginous
D
fibrous
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✅ Correct Answer: 3
12
 The joint in our elbow is an example of
A
hinge joint
B
ball and socket joint
C
pivot joint
D
gliding joint
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✅ Correct Answer: 1
13
Find the correctly matched pair
A
Fibrous joint — between phalanges
B
Cartilaginous joint — skull bones
C
 Gliding joint — between zygapophyses of the successive vertebrae
D
Hinge joint — between vertebrae
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✅ Correct Answer: 3
14
 Which of the following joints does not allow any movement?
A
 Synovial joint
B
Fibrous joint
C
Ball and Socket joint
D
Cartilaginous joint
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✅ Correct Answer: 2
15
 Glenoid cavity articulates
A
Clavicle with acromion
B
Clavicle with scapula
C
Scapula with acromion
D
 Humerus with scapula
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✅ Correct Answer: 4
16
The joint between atlas and axis is
A
Saddle joint
B
Angular joint
C
Pivot joint
D
 Cartilaginous joint
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✅ Correct Answer: 3
17
Find the correct pair
A
 Gliding joint – between carpals
B
Cartilaginous joint – between frontal and parietal
C
Hinge joint – between humerus and pectoral girdle
D
Pivot joint – between third and fourth cervical vertebrae
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✅ Correct Answer: 1
18
The type of joint between the skull bones is
A
 Fibrous
B
Cartilaginous
C
Synovial
D
Hinge
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✅ Correct Answer: 1
19
Ribs and sternum are connected by
A
Areolar tissue
B
 Hyaline cartilage
C
White fibrous cartilage
D
 Bony matter
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✅ Correct Answer: 2
20
 The joint between 1st and 2nd cervical vertebrae
A
Gliding joint
B
Saddle joint
C
 Pivot joint
D
Hinge joint
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✅ Correct Answer: 3
21
During replication, Okazaki fragments elongate
A
leading strand towards the replication fork
B
 lagging strand towards the replication fork
C
 leading strand away from the replication fork
D
lagging strand away from the replication fork
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✅ Correct Answer: 4
22
 Which of the following enzymes separates the two strands of DNA during replication?
A
 Gyrase
B
 Topoisomerase
C
Helicase
D
 DNA polymerase
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✅ Correct Answer: 3
23
 DNA replication is
A
conservative
B
conservative and discontinuous
C
semi-conservative and discontinuous
D
 semi-conservative and semi-discontinuous
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✅ Correct Answer: 4
24
 Which of the following is used in DNA replication studies?
A
Neurospora crassa
B
Drosophila melanogaster
C
 Escherichia coli
D
Pneumococcus
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✅ Correct Answer: 3
25
Which of the following helps in opening of DNA double helix in front of replication fork?
A
topoisomerase
B
DNA polymerase-I
C
 DNA gyrase
D
DNA ligase
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✅ Correct Answer: 3
26
 Termination of replication is triggered by
A
 DNA polymerase
B
Helicase
C
 SSB
D
Tus protein
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✅ Correct Answer: 4
27
DNA polymerase synthesizes
A
DNA in 5’-3’ direction
B
 DNA in 3’-5’ direction
C
 mRNA in 3’-5’ direction
D
mRNA in 5’-3’ direction
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✅ Correct Answer: 1
28
 Association of histones H1 with nucleosome shows
A
 the occurrence of transcription
B
the occurrence of replication
C
exposed DNA double helix
D
the condensation of DNA into chromatin fibre
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✅ Correct Answer: 4
29
The 3’ – 5’ phosphodiester linkage joins
A
two DNA strands
B
two nucleotides
C
a nitrogenous base with pentose sugar
D
 two nucleosides
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✅ Correct Answer: 2
30
The fragments of DNA are joined together by which of the following enzymes?
A
 Endonuclease
B
DNA polymerase
C
 Primase
D
 Ligase
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✅ Correct Answer: 4
31
 Which one of the following is a colonial alga?
A
Ulothrix
B
Spirogyra
C
 Volvox
D
Chlorella
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✅ Correct Answer: 3
32
Which of the following shows zygotic meiosis?
A
 Chlamydomonas
B
 Marchantia
C
 Funaria
D
Fucus
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✅ Correct Answer: 1
33
 Find the incorrect statement
A
Agar-agar is produced from Gracilaria
B
Chlorella is used in space food
C
Mannitol is a food reserve of Rhodophyceae
D
Algin is produced by algae
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✅ Correct Answer: 3
34
 Which of the following has non-flagellated isogamous gametes?
A
Spirogyra
B
 Chlamydomonas
C
Volvox
D
Fucus
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✅ Correct Answer: 1
35
Mannitol is a reserved food found in
A
Gracillaria
B
Porphyra
C
Chara
D
 Fucus
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✅ Correct Answer: 4
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