Biochemistry – Question 3
Amber codon refers to
a) Mutant codon
b) Stop codon
c) Initiating codon
d) Codon for more than one amino acid
Answer and Explanation
b) Stop codon
Stop codons are also called “termination” or “nonsense” codons.
The three stop codons have been given names:
UAG: Amber
UGA: Opal
UAA: Ochre
Important point:
The most common start codon is AUG, which is read as methionine or, in bacteria, as formyl-methionine.
Ref: Harper’s Illustrated Biochemistry, 31st Edition and Page-396
