Guided Notes
1. What are the two reasons that cells divide?
 The cell has more ______________________ trying to move nutrients and wastes across the
______________________________________.
 The ________________________ a cell becomes, the more demands it puts on its __________________.
2. What is the cell cycle?
 The sequence of ____________________________________ of a cell.
3. The two periods of the cell cycle are…
 growth phase
 division phase
4. What is the term used for the growth phase?
5. Most of the cell’s life is spent in ________________________, which means it is the ________________________ phase of the cell cycle.
6. Define the following and mark them on the diagram of cell:
A. Centrioles – help to
____________________ cell division
B. Chromatin –___________ bound protein within the
_________________________

7. During what three phases are new DNA molecules formed?
G1 – 1st period of growth
1. Increase in size.
2. Makes new proteins and organelles.
S – DNA is synthesized or replicated
1. Chromosomes are replicated.
2. New DNA molecules are made.
G2 – final cell growth
1. Shortest phase
2. Prepares cell for mitosis
8. Of the three which is the 1 st period of growth?
9. What happens during the S phase?
1. Chromosomes are replicated.
2. New DNA molecules are made.
10. True or False: The cell prepares for mitosis during the G
2
phase.
11. Draw and identify the phases of the cell cycle below.

12. Define chromosome. Draw and label its parts.
 Chromosome – contains _____________
__________________________ (DNA) passed from _______ generation to the next
A – Centromere: center of chromosome
B – Chromatids: two identical “sister” parts of the chromosome
13. The division phase of the cell cycle is called:
14. What is the acronym for the phases of mitosis?
15. Sequence the four phases of mitosis in order:
______ metaphase
______ telophase
______ anaphase
______ prophase
16. Where in the cell does mitosis take place?
______________________ of the cell
17.
Match the following:
(write the first letter of each word in the blank)
_______ nucleus disappears; centrioles migrate P = Prophase
to poles; spindles are formes A = Anaphase
_______ chromosomes meet in middle T = Telophase
_______ chromatids are pulled apart and away M = Metaphase
from each other
_______ new nucleus starts to form; cytoplasm
begin to divide

18. Draw what happens during each phase within the cell.
19.
What is cytokinesis?
Cytoplasm ________________________________________________
20.
What is cancer?
Cancer is a disorder where the cell has:
21.
Cancer cells do ____________ respond to regulators.
22.
This causes the cells to form masses called ________________, which can damage surrounding _____________________.