There are 64 codons and 20 amino acids Which of the followin

There are 64 codons and 20 amino acids. Which of the following is not true?

A. Several different codons can specify the same amino acid.

B. The AUG codon, or methionine, is the start codon.

C. All amino acids are linked to a codon.

D. Each amino acid is specified by only one codon.

Answer:

D. Each amino acid is specified by only one codon.

Explanation:

Some of the amino acids are specified by more than one codon.

Ex. Amino acid, Leucine is specified by six codons, UUA, UUG, CUU, CUC, CUA & CUG.