Question

There are 64 codons in genetic code dictionary because

• A. There are 64 types of tRNA's found in the cell
• B. There are 44 meaningless and 20 codons for amino acids
• C. Genetic code is triplet
• D. There are 64 amino acids to be coded

Answer 1

Answer: (C)

Genetic code is triplet

Four nitrogen bases make triplet codon and each encodes one amino acid out of 20 amino acids and provide plenty of information in the DNA molecule to specify the placement of all 20 amino acids. So, there are 64 codons in genetic code dictionary because the genetic code is a triplet. Thus, option C is correct.