Question

How many codons will be altered in the following case?

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases.

Options

• 333

• 11

• 33

• 1

Answer 1

33

Explanation:

There are 333 codons in 999 bases       .... ( ∵ 1 codon = 3 bases)

The first 900 bases will remain unchanged if the 901^th base is removed. As a result, the number of unmodified codons will be 300. The number of codons that will be changed as a result of the 99 base alteration will be 33.