Which statements about mRNA codons are correct?
I. Each amino acid is coded by only one codon.
II. Codons code for several amino acids.
III. UAA, UAG, UGA are stop codons.
IV. Several amino acids are coded by more than one codon.

Question

Quizplus · Accepted Answer

III. UAA, UAG, UGA are indeed stop codons, which signal the end of protein synthesis. IV. The genetic code is degenerate, meaning several amino acids are indeed coded by more than one codon.

Which Statements About MRNA Codons Are Correct