3 Cell Cycle and Division
Cyclin is the ______ subunit, and the Cdk is the _____ subunit.
A) Catalytic, regulatory
B) Dependent, independent
C) Regulatory, catalytic
D) Independent, dependent
M-Cdk is inactivated by which complex to regulate the metaphase-to-anaphase transition?
A) Anaphase-promoting complex (APC)
B) Skp1, Cullins, F-box protein complexes (SCF)
C) Origin recognition complex (ORC)
D) S cyclin-CDK complex
An anaphase event requires all of these structures except?
B) Spindle pole
C) Mitotic spindle
D) Contractile ring
In which phase does the centrosome cycle begin?
C) G1 phase
D) G0 phase
When do fragments of ER and golgi apparatus likely disperse in the cell?
A) During mitosis
B) During cytokinesis
C) During replication
D) During the G1 phase
Why do the mitochondria and chloroplasts remain intact during the cell cycle?
A) They are too big to break apart.
B) They are small enough to remain intact.
C) They are involved in cell division.
D) They provide structure to the cell.
What is the contractile ring composed of? (select more than one answer)
A) Actin filaments
D) Myosin motor proteins
A & D
In the cell cycle, what are the purposes of checkpoints? (select more than one answer)
A) Check to see if environment is favorable
B) Check to see if DNA is intact
C) Check to see if DNA is replicated
D) Check to see if chromosomes are attached to spindles at metaphase plate
A, B, C, & D
In what stage of the cell cycle does the levels of M-Cdk increase?
C) Only S-phase
D) Only G1
Which Cdk is responsible for prevention of reformation of the origin recognition complex?