Imagine an essential protein with the amino acid Proline at

Imagine an essential protein with the amino acid Proline at the fifth position, encoded by a CCA codon. Which of the following mutations is most likely to occur? CCA to CCT CCA to CTA CCA to CGA CCA to GCA All of the above mutations are equally likely.

Solution

A) CCA to CCT

because CCT codon codes for the amino acid proline so that mutation will be silent and it will not affect the structure or function of the protein.