Post-Translational Modifications of Proteins May Include Which of the Following

Question

Post-translational modifications of proteins may include which of the following?
A)removal of introns
B)addition of a 5' cap
C)addition of a poly-A tail
D)addition of carbohydrates to form a glycoprotein
E)removal of exons

Accepted Answer

Post-translational modifications involve changes to the protein structure after it has been synthesized. Addition of carbohydrates to form a glycoprotein is a common post-translational modification that often affects the protein's function and localization. The other options listed are not post-translational modifications but are rather steps in the process of mRNA processing (A, B, E) or mRNA stability (C).