What controls the cell cycle?
A mechanisms involving proteins & enzymes
Which substances combine together signal the start and the end of the cell cycle?
The combination of cyclin with CDK
What is cancer?
uncontrolled growth and division of cells.
Cancer only occurs in weak organisms: True or False?
False
What are carcinogens?
Substances and agents that are known to cause cancer.
Mention 2 causes of cancer
mutations or changes in the segments of DNA, carcinogens, inherit changes
Give 2 examples of carcinogens
ultraviolet radiation from sun, x-rays, tobacco, viruses
Often, the damage that occurs in a cell is repaired by various repair systems. But if the repair system fail, cancer can result: True or False?
True
Why the risk of cancer increases with age?
Over time, there might be many changes in DNA.
Is the programmed cell death, for those cells that is not destined to survive:
Apoptosis
When does apoptosis occurs?
When cells are damaged beyond repair
What does apoptosis prevent?
can help to protect organisms from developing cancerous growths.
Cancer cells spend less time in __________ than do normal cells.
interphase
