Key
9.3 Regulating the Cell Cycle Notes
Normal Cell Cycle
Different
Cyclin
CDK
combinations
Signal
other activities, including DNA replication, protein synthesis, and nuclear division throughout the cell
cycle.
M
Starts nuclear
division activities
Cyclin
Drives
S
protein
synthesis
Signals preparation
for cell cycle start
CDK
S
replication Signals DNA process
1
cyclin
CDK
checkpoint
Quality Control Checkpoints
The cell cycle has built-in
Check points
that monitor the cycle and can stop it
if something goes wrong.
Spindle
checkpoints also have been identified in mitosis.
Abnormal Cell Cycle: Cancer
Cancer
is the uncontrolled growth and division of cells.
Kill
an organism by crowding out normal
Cancer
Cancer cell can
A
cells, resulting in the loss of tissue function.
B
Causes of Cancer
The changes that occur in the regulation of cell growth and division of cancer cells are due to
time
mutations
genetics , , age
Various
environmental
factors can affect the occurrence of cancer cells.
Lifestyle choice's
Apoptosis
II
Programmed cell
death
ST
4
Cells going through
Apoptosis
actually shrink and shrivel in a
controlled process.
causes of cancer in individuals
- genetics
- lifestyle choices
- age
is
11
241 moq
aqhour
(?) moqe P
