Chapter 12 - Section 3

Question 1

How is the eukaryotic cell cycle regulated?

Answer 1

By a molecular control system

Question 2

how is the cell cycle generally driven?

Answer 2

by specific chemical signals that are present in the cytoplasm

Question 3

how is the cell cycle control system regulated

Answer 3

by internal and external controls

Question 4

What does the G1 checkpoint do?

Answer 4

determines whether the cell recieves the go ahead to complete the rest of the process, or it will go into a nondividing phase called the G0 phase.

Question 5

cyclins and cyclin-dependent kinases

Answer 5

these are two types of regulatory proteins

Question 6

MPF (Maturation-promoting factor)

Answer 6

a cyclin cdk complex that triggers a cells passage past the G2 checkpoint into the M phase.

Question 7

density dependent inhibition

Answer 7

an external signal in which crowded cells stop dividing.

Question 8

anchorage dependence

Answer 8

cells must be attached to a substratum in order to divide

Question 9

transformation

Answer 9

the process by which a normal cell is converted to a cancerous cell

Question 10

benign tumor

Answer 10

masses of abnormal cells remain only at the original site