Question

What is a triplet codon?

Options

• A sequence of two nucleotides on DNA that codes for a specific amino acid

• A sequence of four nucleotides on tRNA that codes for a specific amino acid

• A sequence of three nucleotides on mRNA that codes for a specific amino acid

• A sequence of three amino acids that form a polypeptide chain

Answer 1

A triplet codon is defined as a sequence of exactly three nucleotides on mRNA. Each triplet specifies a particular amino acid or a signal during translation. This is the fundamental basis of the genetic code that determines the sequence of amino acids in proteins.