Which statement concerning cyclins is NOT correct?
A) They are activated and degraded during the cell cycle.
B) They are regulatory subunits for enzymes that catalyze the phosphorylation of proteins.
C) They can become linked to ubiquitin.
D) They catalyze the phosphorylation of proteins.
E) They contain specific amino acid sequences that target them for proteolysis.

Question

Quizplus · Accepted Answer

Cyclins are regulatory subunits that bind and activate cyclin-dependent kinases (CDKs), which in turn catalyze the phosphorylation of specific substrates to progress through the cell cycle. Cyclins themselves do not catalyze phosphorylation reactions.

Which Statement Concerning Cyclins Is NOT Correct