Cell Cycle Regulation

Question 1

The steps of the cell cycle are controlled by
proteins called what?

Answer 1

cyclins

Question 2

Cyclins, which bind to enzymes
called what?

Answer 2

cyclin-dependent kinases (CDKs).

Question 3

These cyclin/CDK combinations, control different activities of the cell cycle, such as what?

Answer 3

starting the cell cycle, DNA replication, protein synthesis, nuclear division, as well as signaling the end of the cell cycle.

Question 4

The cell cycle has built-in what?

Answer 4

checkpoints

Question 5

What does checkpoints help do?

Answer 5

monitor the cycle and can stop it if something is wrong

Question 6

Examples of things that could be wrong in checkpoints.

Answer 6

(DNA damage during replication or chromosome misalignment due to the or failure of the spindle fibers).

Question 7

When cells do not respond to the normal cell cycle control mechanisms a condition is called what

Answer 7

cancer

Question 8

What is cancer?

Answer 8

The uncontrolled growth and division of cells that can be caused by changes in control of the cell cycle and also may be caused by environmental factors.