7.1 cell division

Question 1

What is the order of the events in the cell cycle?

Answer 1

G1, S, G2, M

Question 2

What happens in S?

Answer 2

The cell replicates its DNA and checks for errors in replication.

Question 3

What are examples of stimulatory proteins?

Answer 3

growth factors, cycling, cdk

Question 4

What is the function inhibitory proteins?

Answer 4

They stop the cell from progressing in the cell cycle.

Question 5

What is a proto-oncogene?

Answer 5

A code for stimulating proteins and become dominant oncogenes when mutated.

Question 6

What are tumor suppressor genes?

Answer 6

Code for inhibitory proteins and become recessive when mutated .

Question 7

What is the difference between an oncogene and a proto-oncogene

Answer 7

An oncogene is a mutation of a proto-oncogene that is cancer when one is mutated.

Question 8

What happens when there is cyclin vs. when there’s no cyclin?

Answer 8

When cyclin binds to cdk the s phase begins, but when not the s factors turn off.

Question 9

Compare and contrast cyclin and kinase.

Answer 9

cyclin has multiple type, triggered by growth factors, concentrations peak at certain points, and activates cdk. kinase has a constant concentration, only works when cyclin is attached, and adds phosphate groups