Observe the table and answer the given question:

How many codons with 'A' at second position code for amino acids?

14

The correct answer is Option (2) → 14

The genetic code consists of 64 codons in total, organized based on their first, second, and third nucleotide positions. If we focus on codons with 'A' in the second position, we can categorize them according to their first and third positions:

Here are the possible combinations of codons with 'A' in the second position:

• UAU, UAC (Tyrosine)
• UAA,UAG ( Stop codon)
• CAU, CAC (Histidine)
• CAA, CAG (Glutamine)
• AAU,AAC (Asparagine)
• AAA,AAG (Lysine)
• GAU, GAC (Aspartic acid)
• GAA, GAG (Glutamic acid)

Each of these combinations results in a total of 16 codons with 'A' at the second position. Out of these, 14 code for amino acids.

          The Codons for the Various Amino Acids