Question

individual work
cell cycle and cell division
name:
date:
score
period
read the statements and identify the appropriate phase of the cell cycle or checkpoint (g1, s, g2, m)

1. second gap phase
2. if the cell does not pass this check point it is sent to g0
3. this checkpoint looks for correct dna replication
4. first gap phase
5. dna replication
6. initial growth of the cell

7 the dividing phase

1. this checkpoint looks for spindle fiber formation
2. the final growth phase
3. if the cell does not pass this checkpoint it may go through apoptosis

directions: for questions 11 - 15 refer to the images below representing the phases of mitosis

Explanation:

1. The second gap phase is G2.
2. The G1 checkpoint determines if the cell proceeds or goes to G0, so this refers to G1.
3. The G2 checkpoint checks for correct DNA - replication, so this is G2.
4. The first gap phase is G1.
5. DNA replication occurs in the S phase.
6. Initial cell growth happens in G1.
7. The dividing phase is the M phase.
8. The M - phase checkpoint looks for spindle fiber formation, so this is M.
9. The final growth phase is G2.
10. The M - phase checkpoint can lead to apoptosis if failed, so this is M.

Answer:

1. G2
2. G1
3. G2
4. G1
5. S
6. G1
7. M
8. M
9. G2
10. M