Question

If the codon GGU is positioned in the A site of the ribosome, which of the following will occur?

a)The mRNA will exit the E site to prepare for another incoming amino acid.
b)A tRNA with the anticodon CCA will deliver its amino acid to the site.
c)A tRNA with the anticodon CCT will add its amino acid to the peptide chain.
d)The ribosomal complex will dissociate and release the peptide chain.

Answer 1

If the codon GGU is positioned in the A site of the ribosome, a tRNA with anticodon CCT will add its amino acid to the peptide chain.

Step-by-step explanation:

If the codon GGU is positioned in the A site of the ribosome, the correct option would be (c) A tRNA with the anticodon CCT will add its amino acid to the peptide chain. During the elongation stage of translation, a charged tRNA with the complementary anticodon binds to the mRNA in the A site of the ribosome. The amino acid carried by the tRNA is then added to the growing peptide chain through the formation of a peptide bond with the previous amino acid. After the peptide bond is formed, the ribosome moves one codon along the mRNA, shifting the tRNA with its attached amino acid from the A site to the P site. The A site is then ready for the next incoming amino acid carried by a tRNA with the corresponding anticodon.