Question

A codon in mRNA has

• A. 3 bases
• B. 2 bases
• C. 1 base
• D. Number of bases vary

Answer 1

The correct option is A 3 bases

• The sequence of amino acids in proteins depends on the sequence of nucleotides in DNA.
• The DNA produces mRNA molecules through the process of transcription. The mRNA is transported to the cytoplasm where it is translated into protein.
• A sequence of three nucleotides in mRNA specifies a particular amino acid in a protein chain.
  Hence, the genetic codon is a triplet.
  So the correct answer is A.