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Title: AQA AS BIOLOGY THE CELL CYCLE
Description: Detailed first year (AS) biology notes to aid key revision of topics and enhance knowledge.
Description: Detailed first year (AS) biology notes to aid key revision of topics and enhance knowledge.
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The length of a complete cell cycle varies between organisms
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Cancer is a group of diseases caused by a growth disorder of cells
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This leads to uncontrolled growth and division of cells
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Tumours can develop in
any organ of the body, but are most commonly found
in the lungs/ prostate gland/ breast and ovaries/ large
intestine/ stomach/ oesophagus and pancreas
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The mutant cells that are formed are usually structurally
and functionally different from normal cells
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The Cell Cycle
Treatment of Cancer:
This often involves killing dividing cells by blocking a part
of the cell cycle
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Drugs used to treat cancer (chemotherapy) usually disrupt
the cell cycle by:
Preventing DNA from replicating
Inhibiting the metaphase stage of mitosis by interfering with
spindle formation
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As cancer
cells have a fast rate of division, they are damaged to a
greater rate than the normal cells
Title: AQA AS BIOLOGY THE CELL CYCLE
Description: Detailed first year (AS) biology notes to aid key revision of topics and enhance knowledge.
Description: Detailed first year (AS) biology notes to aid key revision of topics and enhance knowledge.