Teaching MPPSC Assistant Professor Mock Test Series 2025 Life Sciences Cellular Organization Cell Division and Cell Cycle
Select the correct combination of statements about cell cycle progression and regulation:
A. Cyclin B forms a complex with CDK1 to drive cells into mitosis by phosphorylating key mitotic proteins.
B. Retinoblastoma protein (Rb) inhibits E2F activity, preventing progression from G1 to S phase until phosphorylated by G1/S-Cdks.
C. Anaphase-promoting complex (APC/C) triggers sister chromatid separation by targeting securin for degradation via ubiquitination.
D. CDK inhibitors such as p21 and p27 directly promote the activation of CDK1 during the G2/M transition.
1
A,B and C
2
B and D
3
A and D
4
A,B and D