Cell Cycle and Cancer After Lecture Questions

Which biomolecule regulates the cell cycle?

• Carbohydrates

• Proteins

• Lipids

• Nucleic Acids

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What is the role of cyclins in the cell cycle?

• They provide energy for cell growth

• They regulate the timing of the cell cycle

• They act as a barrier to prevent cell division

• They repair damaged DNA

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Which of the following is NOT a factor that influences cell growth and division?

• Environmental signals

• Availability of nutrients

• DNA mutations

• Wounds or injuries

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How many main checkpoints are there in the cell cycle?

• 1

• 3

• 4

• 6

What happens if a cell fails to pass a checkpoint?

• It immediately enters mitosis

• It enters a resting phase (G0) or undergoes apoptosis

• It repairs itself and continues dividing

• It transforms into a cancerous cell

What is apoptosis?

• The process of uncontrolled cell growth

• A form of programmed cell death

• A checkpoint in mitosis

• The transformation of normal cells into cancerous cells

Which type of tumor is more dangerous because it invades healthy tissues and can spread to other parts of the body?

• Benign

• Malignant

• Stem cell

• Carcinogenic

Which of the following is NOT a known cause of cancer?

• Carcinogens

• Radiation

• Stem cells

• Viruses

What is the purpose of cell differentiation?

• To create tumors in the body

• To help cells become specialized for specific functions

• To allow cells to divide uncontrollably

• To eliminate cells that fail to pass checkpoints

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Why are stem cells considered medically beneficial?

• They can become any type of cell in the body

• They prevent the spread of cancer

• They destroy damaged cells

• They regulate the timing of the cell cycle

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