Question

If there are $999$ bases in 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, how many codons will be altered ?

• A. $333$
• B. $33$
• C. $11$
• D. $1$

Answer 1

The correct option is B $33$

For $333$ amino acids, $999$ bases in RNA code for a protein. On the off chance that the base at $901$ positions is erased, at that point, the initial $900$ bases will be ordinary while bases after the $901$ base will be modified, that is $99$ bases will be changed.

$3$ bases represent $1$ codon, in this way, $99$ bases $=33$ codons will be changed because of the cancellation of one base at $901$ position.

Thus, option C is the correct answer.