Question

Instead of a dna code reading acg tta ccg, a mutation causes it to be coded as acg ata ccg. which type of mutation is responsible for this change?

a. addition
b. deletion
c. substitution
d. chromosomal

Answer 1

A substitution mutation causes the change from ACG TTA CCG to ACG ATA CCG, which is the replacement of one nucleotide with another without altering the sequence length. Therefore , the correct answer options is c)

Step-by-step explanation:

The type of mutation responsible for the change in the DNA code from ACG TTA CCG to ACG ATA CCG is a substitution mutation. This type of mutation occurs when one nucleotide is replaced by another in the DNA sequence.

Unlike deletion or addition mutations, which involve the removal or insertion of nucleotides and can result in frameshifts, substitution mutations merely replace one base with another without altering the number of bases in the sequence.

This can lead to no change in the protein if it's a silent mutation, a different amino acid if it's a missense mutation, or a premature stop codon if it's a nonsense mutation.