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THE EUKARYOTIC CELL CYCLE AND CANCER: AN OVERVIEW

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www.BioInteractive.org
Published February 2016
Page 1 of 3
Student Handout
Click and Learn
The Eukaryotic Cell Cycle and Cancer
THE EUKARYOTIC CELL CYCLE AND CANCER: AN OVERVIEW
ABOUT THIS HANDOUT
This handout complements the Click and Learn “The Eukaryotic Cell Cycle and Cancer” and is intended as
a straightforward introduction to the cell cycle and how it relates to cancer. For a more comprehensive
student handout, please see the in depth version.
PROCEDURE
Read through the Click and Learn at https://www.hhmi.org/biointeractive/eukaryotic-cell-cycle-and-
cancer to learn about the cell cycle. Answer the questions below.
Click on the “Background” tab on the right side. Read the information and watch the videos.
1. Why is
cell division important for both unicellular and multicellular organisms?
2. Why does cell division remain important to an adult organism even after it is fully developed?
3. Cells divide, differentiate, or die. What is differentiation?
4. What is apoptosis? What is its purpose?
5. What are cell cycle regulators?
6. What happens if cell cycle regulators don’t function properly?
Click on the purple section labeled “Cell Cycle Phases” as well as the words “Mitosis” and “Interphase”
to read an overview of the cell cycle. You can also click on the various phases.
7. Cells go through periods of growth and division. Cell division occurs during ___________________
.
The rest of the cell cycle is called interphase, during which (complete the sentence)
_______________________________________________________________________________________________________________
ANSWER THE HIGHLIGHTED QUESTIONS
www.BioInteractive.org
Published February 2016
Page 2 of 3
Student Handout
Click and Learn
The Eukaryotic Cell Cycle and Cancer
8. Fill in the details about what happens during the three phases of interphase labeled in the diagram.
9. In general, what is the purpose of a checkpoint in the cell cycle?
10. What is the G0 phase of the cell cycle?
a. Which factors determine whether a cell enters G0?
b
. Can cells leave G0?
Click on “Cell Cycle Regulators and Cancer” in the center purple circle. Read the Regulators Overview
and then read through the Cancer Overview and watch the videos.
11. What are cell cycle regulators?
www.BioInteractive.org
Published February 2016
Page 3 of 3
Student Handout
Click and Learn
The Eukaryotic Cell Cycle and Cancer
.
.
a. Stimulatory proteins are encoded by ______________________________________
b. Examples include: _____________________________________________________
c. Inhibitory proteins are encoded by _______________________________________
d. Examples include: _____________________________________________________
12. Cance
r is the result of an improperly regulated cell cycle. Describe two reasons why cells can form
tumors.
13. In some types of colon cancer, stem cells have a mutation in the APC gene. What happens if the APC
gene is mutated?
14. Normally, proto-oncogenes stimulate the cell cycle. What are oncogenes and how do they affect the
cell cycle?
a. To cause cancer, proto-oncogenes require __________
allele(s) to be mutated and therefore
are considered ____________________ . The mutation results in a _________
of function.
15. Normally, t
umor suppressor genes inhibit the cell cycle. How do mutated tumor suppressor genes
affect the cell cycle?
a. To cause cancer, tumor suppressor genes require __________
allele(s) to be mutated and
. The mutation results in a ________ of
therefore are considered ___________________
function.
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Completed 17 January 2022

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