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Free download in PDF Mutation Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries.
(21)
Mut S recruits how many component(s) to the mismatched site?
(22)
In E. coli mismatches are detected by which repair protein?
[A]
Mut H
[B]
Mut L
[C]
Mut S
[D]
Mut D
(23)
Normally DNA molecule has A-T, G-C pairing. However these bases can exist in alternative valency status, owing to rearrangements called
[A]
point mutation
[B]
frame shift mutation
[C]
analogue substitution
[D]
tautomerisational mutation
Answer: tautomerisational mutation
(24)
The action of ultraviolet radiation on DNA to induce mutation is the
[A]
formation of thymine dimers
[B]
methylation of base pairs
[C]
deletion of base pairs
[D]
addition of base pairs
Answer: formation of thymine dimers
(25)
In mutational event, when adenine is replaced by guanine, it is case of
[A]
transition
[B]
transcription
[C]
transversion
[D]
frame shift mutation
(26)
Muller was first to produce induced mutations in ---- by exposing them to X rays
[A]
Paramecium
[B]
Arabidopsis
[C]
Drosophila
[D]
Xenopus
(27)
Damage and errors in DNA cause___________
[A]
Mutation
[B]
DNA repair
[C]
Translation
[D]
Transcription
(28)
Mark the INCORRECT statement about mutation?
[A]
Mutation is predestined
[B]
Major source of evaluation
[C]
Usually deleterious and recessive
[D]
It is a reversible process
Answer: Mutation is predestined
(29)
Which of the following is NOT a type of reverse mutation?
[A]
Back mutation
[B]
Intergenic suppressor mutation
[C]
Intragenic suppressor mutation
[D]
Missense mutation
Answer: Missense mutation
(30)
Which of the following is NOT true for loss of function mutation?
[A]
Usually recessive
[B]
Most common mutation
[C]
Increases the activity of the gene
[D]
Null allelic mutation
Answer: Increases the activity of the gene
31
Name the term given to the type of mutation which depends on the conditions of the environment?
[A]
Forward mutation
[B]
Reverse mutation
[C]
Conditional lethal mutation
[D]
Gain of function mutation
Answer: Conditional lethal mutation
32
What is the detection technique of auxotrophs?
[A]
Spread plating
[B]
Replica plating
[C]
Streaking
[D]
Pouring
33
Name the type of mutation in which the cause of mutation is not known?
[A]
Spontaneous mutation
[B]
Suppressor mutation
[C]
Nonsense mutation
[D]
Tyrosine kinase inhibitor
Answer: Mis-sense mutation
34
Addition or deletion of bases causes which kind of mutation?
[A]
Transversion
[B]
Frameshift mutation
[C]
Transition
[D]
Transcription
Answer: Frameshift mutation
35
Which of the following chemical mutagen affects only replicating DNA?
[A]
Acridine dye
[B]
Alkylating agent
[C]
Deaminating agent
[D]
Base analog
36
What is the overall rate at which new mutations arise spontaneously at any given site on the chromosome per round of replication?
[A]
≈ 10-8 – 10-12
[B]
≈ 10-7 – 10-9
[C]
≈ 10-6 – 10-11
[D]
≈ 10-5 – 10-10
37
What is the dinucleotide sequence of microsatellites?
[A]
CA
[B]
AT
[C]
CC
[D]
GC
38
By which process miss-incorporated base can change into a permanent mutation?
[A]
Replication
[B]
Transcription
[C]
Translation
[D]
Transposition
39
How many steps are required to attain mismatch repair?
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