Which of the following is true of a start codon?

Question

UGG is the start codon.

The start codon is the three-base sequence that signals the ribosome to release the peptide chain.

AUG codes for methionine, the amino acid that starts most eukaryotic proteins.

The start codon signals the addition of tryptophan during translation.

Answer 1

The true statement about a start codon is:

AUG codes for methionine, the amino acid that starts most eukaryotic proteins.

The other statements are incorrect:

• UGG is the start codon. (UGG actually codes for tryptophan, not a start codon)

• The start codon is the three-base sequence that signals the ribosome to release the peptide chain. (The start codon signals the initiation of translation, while a stop codon signals the release of the peptide chain)

• The start codon signals the addition of tryptophan during translation. (The start codon specifically codes for methionine, not tryptophan)