[Campbell Biology P.390] Based on the information provided, what is the dual function of the... | Practice Question
Based on the information provided, what is the dual function of the mRNA codon AUG?
A: It codes for the amino acid Glutamine (Gln) and acts as a stop signal.
B: It codes for the amino acid Methionine (Met) and acts as an initiation (start) codon.
C: It codes for the amino acid Alanine (Ala) and also for Glycine (Gly).
D: It codes for the amino acid Tryptophan (Trp) and functions as a termination codon.
Explanation
The text explicitly states: 'Notice that the codon AUG has a dual function: It codes for the amino acid methionine Met, or M and also functions as a "start" signal, or initiation codon.'