Multiple Choice
DNA replication at each origin occurs only once during the cell cycle because of:
A) specificity of the origin-recognition complex (ORC) .
B) S phase Cdk phosphorylating MCM helicase.
C) MCM helicase loading by M phase cyclins.
D) G1 cyclin/cdk activation of E2F.
Correct Answer:

Verified
Correct Answer:
Verified
Q21: Which of the following is targeted by
Q22: Cyclin D/Cdk4 functions during:<br>A)G₁.<br>B)S.<br>C)G₂.<br>D)M.
Q23: The S.cerevisiae homolog of Xenopus MPF is:<br>A)Cdc13-Cdc2.<br>B)Cdc25-Cdc2.<br>C)Clb1-Cdc28.<br>D)Cln3-Cdc28.
Q24: How do chromosome movements differ between meiosis
Q25: Exit from mitosis depends upon the degradation
Q27: What is a cdc mutant? What protein
Q28: Centromeric Rec8 becomes cleaved during:<br>A)meiosis I.<br>B)meiosis II.<br>C)mitosis.<br>D)none
Q29: Mitotic cyclin levels in early Xenopus embryos
Q30: How does p53 function as a tumor-suppressor
Q31: After addition of serum to G₀-arrested mammalian