Which of the Following Is Most Likely to Have a Small

Multiple Choice

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