Which of the following amino acids has more than one codon? a) Valine
b) Leucine
c) Serine
d) All of the above

Option D.

All of the above.

Explanation:

This is because valine, leucine and serine have more than one codons. Leucine and serine have six codons each while valine have four codons.

Codon refer to a sequence of either DNA or RNA that is associated with a specific amino acid and can stop signal during protein production. The complete set of codons is genetic code.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;