Question

Suppose a polypeptide chain is $80$ amino acid molecules long. What must be the minimum number of codons in the genetic code involved in it formations?

• A. $50$
• B. $150$
• C. $49$
• D. $81$

Answer 1

The correct option is D $81$

As each amino acid is coded by one triplet codon, 80 amino acids corresponds to 80 codons and one stop codon and hence totally there should be 81 codons including stop codon.

So, the correct option is '81'.