Sir Nico PPTs: The Cell Cycle

Question 1

Interphase or Mitotic Phase.
G1, S1, G2

Answer 1

Interphase

Question 2

Interphase or Mitotic Phase.
Mitosis & Cytokinesis

Answer 2

Mitotic Phase

Question 3

o longest event in the cycle
o cell grows and makes a new
copy of DNA
o packs enough nutrients for the
new daughter cells
o Duplication of organelles

Answer 3

Interphase

Question 4

Interphase.
The cell grows larger, duplicates the organelles, and makes the molecular building blocks needed for the succeeding steps.

Answer 4

First Gap (G1)

Question 5

Interphase.
DNA replication and duplication of centrosomes occur.

Answer 5

Synthesis phase

Question 6

Interphase.
Cell grows continuously, fills up the loss of energy during the S phase, making more proteins, continuously duplicating the organelles, and completing the preparations for the mitotic phase.

Answer 6

Second Gap (G2)

Question 7

o Duplication division
o Cytokinesis –division of the
cytoplasm producing two daughter cells.

Answer 7

Mitotic (M) Phase

Question 8

Why do cells enter G0 phase?

Answer 8

 Unfavorable environmental conditions
 Waiting for signals to enter G1
 Permanent state for some cells like nerve
and cardiac muscle cells.

Question 9

How Long does the Whole Cell Cycle take?

Answer 9

24 hours

Question 10

How Long does the ___ take?
a. G1 Phase
b. S Phase
c. G2 Phase
d. M Phase

Answer 10

a. 5 - 6 hours
b. 10 -12 hours
c. 4 - 6 hours
d. Greater than 1 hour

Question 11

“ G” w as mistaken to be gaps because they were thought to be an _____ but it turns out to be the period for intense metabolic activity.

Answer 11

inactive phase

Question 12

Cell Cycle Control System.
Activates or deactivates another protein by ____?___ them. It givesthe‘stop’ and‘go’ signal at the Gap 1 and Gap 2 checkpoints.

Answer 12

(?)phosphorylating

Cyclin - Dependent Kinases (CDK) complexes

Question 13

Cell Cycle Control System.
Undergo a constant cycle of synthesis and degradation during cell division. An activating protein that binds to a kinase to form CDK complex

Answer 13

Cyclin

Question 14

Cell Cycle Control System.
Responsible for suppressing tumors, repairs the damaged DNA, and trigger apoptosis if the damaged is beyond repair

Answer 14

p53

Question 15

If First Gap (G1) ‘s environment is unfavorable:

Answer 15

o Delayed progress through G1
o Enter G0 ( specialized resting phase)
-Quiescent (dormant)
-Senescent (aging or deteriorating)

Question 16

First Gap (G1).
If the environment is favorable but does not proceed to S Phase:

Answer 16

o cell differentiate

Question 17

Second Gap (G2).
Is the environment _____?
Is all DNA _____?

a.1 if not?

Answer 17

favorable; replicated

a.1 Delayed mitosis

Question 18

M Phase.
Are all chromosomes ____?

a.1 If not?

Answer 18

attached to the spindle

a.1 halts mitosis