Understanding Cancer and the Cell Cycle

What is the primary reason for the increase in cancer incidence with age?

• The cell cycle becomes more efficient.

• The balance between cell birth and death changes.

• The number of cells in the body decreases.

• The immune system becomes stronger.

How many mutations do most cancer cells acquire in cell cycle control genes?

• 5 to 10

• 10 to 15

• 15 to 20

• 20 to 18

What is the typical time frame for a normal cell to become cancerous?

• 15 to 40 years

• 40 to 50 years

• 5 to 10 years

• 10 to 20 years

What lifestyle change can significantly reduce the risk of cancer if done before age 30?

• Increasing physical activity

• Eating more fruits and vegetables

• Quitting smoking

• Reducing alcohol consumption

What percentage of cancers can be avoided by modifying lifestyles and protecting the environment?

• 20%

• 30%

• 40%

• 50%