When the ribosome reaches a nonsense codon, which of the following occurs?

a methionine is incorporated

the polypeptide is released

a peptide bond forms

the A site binds to a charged tRNA

The correct answer will be option-the polypeptide is released.

Explanation:

The non-sense codons are the codons which do not have any t-RNA thus do not code for any amino acids and leads to the termination of the translation.

The main non-sense codons are UGA, UAA and UAG which when read by the ribosome terminates the process of translation as these codons do not have the t-RNA due to which the ribosome releases the polypeptide from the E-site of the ribosome and terminates the process.

Thus, the option-the polypeptide is released is the correct answer.