A triplet of nucleotides is the code for one...

• A. Amino Acid
• B. Nucleotide
• C. Codon
• D. Protein

Answer: (A)

A triplet of nucleotides is the codon, the unit of the genetic code that specifies which amino acid to add during protein synthesis. In other words, each codon corresponds to a particular amino acid (or to a stop signal that ends translation). The amino acid is the product encoded by that codon, not the triplet itself. So the triplet is the codon, while amino acids are the outcomes of decoding that codon. The other options don’t fit: a nucleotide is a single building block, a protein is the final product of translation, and the amino acid is what a codon can code for, not the code unit itself.