複選題12. Regarding to cell cycle, which is (are) CORRECT? (A) Cyclin D expresses at M phase (B) Separase cleavages condensin to separate 2 chromatids. (C) P21 is a stress-induced inhibitor of CDK (D) P27 expresses in G1 to keep cells in G0 (E) P53 is induced under stress to drive P27