Question

How many effective codons are there for the synthesis of twenty amino acids?

• A. 64
• B. 32
• C. 60
• D. 61

Answer 1

The correct option is D 61

George Gamow in 1954, pointed out the possibility of a three letter code i.e. triplet codon. This will give 4 x 4 x 4 = 64 codons which are more than enough to code for twenty amino acids. Out of these 64 codons, 3 codons are stop codons. Hence, 61 effective codons are there for the synthesis of twenty amino acids.

So, the correct answer is '61'.