試題詳解

26. Molecules involved in cell cycle controls cell growth. Which statements regarding cell cycle are CORRECT?
(A) There are 5 different phases, namely G0, G1, S, G2, and M
(B) DNA content in both G2 and M phase is twice as much as G1
(C) There are two major checkpoints namely G1/S and G2/M checkpoints which ensure that everything is ready for DNA synthesis and mitosis, respectively
(D) CDK is inactive in the absence of cyclin
(E) DNA damage-induced cell cycle arrest is due to the induction of p53 and its downstream genes such as CDK inhibitors.