Cell Cycle Regulation

Question 1

________: a protein that is synthesized and then degraded in concert with events of the cell cycle; binds to a CDK to promote events of the cell cycle

Answer 1

Cyclin

Question 2

How are cyclin protein levels increased in a cell?

Answer 2

Gene expression (transcription + translation)

Question 3

How are cyclin protein levels decreased in a cell?

Answer 3

Protein degradation (protein breakdown)

Question 4

Cyclin | When Protein Levels are High
————–|——————————————–
|
D |
|

Answer 4

G1, S, G2

Question 5

Cyclin | When Protein Levels are High
————|——————————————
|
E |
|

Answer 5

Late G1, early S

Question 6

Cyclin | When Protein Levels are High
————–|——————————————–
|
A |
|

Answer 6

S, G2

Question 7

Cyclin | When Protein Levels are High
————–|——————————————–
|
B |
|

Answer 7

G2, early M

Question 8

_________: (_________), a kinase protein that becomes active after binding to a cyclin

Answer 8

CDK, cyclin-dependent kinase

Question 9

The concentration of CDK in the cell is constant / changes over time

Answer 9

Is constant

Question 10

what three molecules does CDK need to bind to in order to be active and carry out its function?
1.
2.
3.

Answer 10

Cyclin, ATP, Target protein