LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

MOLECULAR BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What mutation is a deletion or insertion of one or more nucleotides that changes the reading frame of the base sequence?
A
splicing
B
frameshift
C
elongation
D
mutagen
Explanation: 

Detailed explanation-1: -Deletion frameshift mutation, wherein one or more nucleotides are deleted in a nucleic acid, resulting in the alteration of the reading frame, i.e., reading frameshift, of the nucleic acid.

Detailed explanation-2: -Insertion mutations and deletion mutations are the two forms of frameshift mutations that might occur.

Detailed explanation-3: -Deletion mutations. In the top sequence three nucleotides comprising a single codon are deleted. This shortens the resulting protein product by one amino acid but does not affect the rest of its sequence. In the lower section, a single nucleotide is deleted.

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