Mitotic Cyclin Levels in Early Xenopus Embryos are Regulated By

Question

Mitotic cyclin levels in early Xenopus embryos are regulated by:
A)phosphorylation.
B)synthesis and degradation of their mRNAs.
C)degradation by APC.
D)degradation by MPF.

Accepted Answer

Mitotic cyclin levels in early Xenopus embryos are regulated by degradation through the Anaphase Promoting Complex (APC), which targets cyclins for ubiquitination and subsequent proteasomal degradation.