33: Cell Cycle

What is the basic unit of all living organisms?

• Systems

• Cells

• Organs

• Tissues

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How does a multicellular organism grow?

• By absorbing nutrients

• By cells merging together

• By making more cells through cell division

• By each cell getting larger

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What is one reason why cancer cells are problematic?

• They divide too frequently

• They do not divide at all

• They help in tissue repair

• They communicate well with healthy cells

Which phase of the cell cycle involves the cell growing and replicating its DNA?

• Interphase

• G0 phase

• Cytokinesis

• M phase

What is the purpose of checkpoints in the cell cycle?

• To stop the cell cycle permanently

• To merge cells together

• To speed up cell division

• To ensure the cell is growing and replicating DNA correctly

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What happens if a cell cannot pass a checkpoint and the issue cannot be fixed?

• The cell continues to divide

• The cell merges with another cell

• The cell enters G0 phase

• The cell undergoes apoptosis

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Which protein is involved in initiating apoptosis?

• Cdk

• Kinase

• p53

• Cyclin

What is the role of cyclin in the cell cycle?

• To bind with Cdk and regulate the cell cycle

• To merge cells together

• To stop the cell cycle

• To destroy damaged cells

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What is the G0 phase?

• A resting phase where cells do not prepare to divide

• A phase where cells are actively dividing

• A phase where cells merge together

• A phase where cells prepare to divide

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Why might neurons in the brain and spinal cord have difficulty healing after injury?

• They are always in the M phase

• They may stay in the G0 phase permanently

• They divide too frequently

• They do not enter the G0 phase