Which of the following is most likely to have a small protein called ubiquitin attached to it?
A)a cyclin that usually acts in G1, now that the cell is in G2
B)a cell surface protein that requires transport from the ER
C)an mRNA that is leaving the nucleus to be translated
D)a regulatory protein that requires sugar residues to be attached
E)an mRNA produced by an egg cell that will be retained until after fertilization

Question

Quizplus · Accepted Answer

Ubiquitin is often attached to proteins that need to be degraded, such as cyclins that are no longer needed after a specific phase of the cell cycle.

Which of the Following Is Most Likely to Have a Small