複選題37. About cell cycle and cell division, which of the following descriptions are correct? (A) Proliferating cells often undergo asymmetric division by asymmetric mitotic spindle positioning (B) In asymmetric cell divisions that generate apoptotic cells, such as those in C. elegans, the apoptotic event randomly occurs in either of the daughter cells (C) In mammalian cells, cyclin B mainly functions in G2 and M phases through anaphase, whereas cyclin D functions in S phase (D) Ubiquitin/SCF-dependent degradation of S-phase cyclin-CDK inhibitors is required for the cell cycle to proceed through S phase (E) DNA-damage checkpoint proteins detect DNA damage and block progression through the cell cycle