2.5 The Cell Cycle
Name:
1. What are the three distinct stages of the cell cycle? i.
ii.
iii.
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2. Interphase is the longest stage for most cells. But why is it not considered to be a
resting stage?
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3. What happens to the genetic material (DNA) in this phase in preparation for cell
division? ____________________________________________________________
4. Cell division occurs in two stages. These stages are __________ and ___________.
5. Division of the contents of the nucleus occurs in __________ and division of the rest
of the cell occurs in __________.
6. Which of the following is not a stage of mitosis:
a) metaphase
b) telophase
c) interphase
d) anaphase
e) prophase
7. As interphase ends, the cell enters the first phase of mitosis – prophase. The longest
strands of DNA condense _______ into a compact form, becoming visible under a light
microscope as __________. –another word for condense is to shorten.
8. Because the DNA was copied during __________, each chromosome consists of two
identical strands called sister chromatids. What is the definition of chromatid (on the
right margin of page 41):
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9. On the diagram below, label the structure that holds the sister chromatids together:
10. During prophase, the nuclear membrane _______________. –This means it disappears.
11. When all of the chromosomes are lined up in the middle of the cell, what phase of
mitosis is the cell in? _______________.
12. In __________, the centromere splits and the sister chromatids separate. They are
now called _____________________.
13. Look at figure 6 on page 43. What stage of mitosis does the diagram below depict?
Label the structure the line is pointing to on the given diagram.
__________
14. The final stage of mitosis is called __________. The daughter chromosomes stretch
out, become thinner, and are no longer visible. A new nuclear membrane forms around each
group of daughter chromosomes. As this stage the cell appears to have _____ nuclei.
15. Although not a stage of mitosis, cytokinesis is the final stage of cell division. The
cytoplasm divides, producing two genetically identical daughter cells.
16. Describe the difference between the process of cytokinesis in plant and animal cells:
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