TOPIC 9 DAY 1 CELL CYCLE AND CANCER

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What is the cell cycle?

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The cell cycle is the series of events that take place in a cell leading to its division and replication. It consists of interphase (G1, S, G2 phases) and mitosis.

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What occurs during interphase?

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During interphase, the cell grows, performs its normal functions, and prepares for division. This includes DNA replication in the S phase.

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What is mitosis?

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Mitosis is the stage of the cell cycle where the cell divides its nucleus and contents, resulting in two daughter cells.

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What is cancer?

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Cancer is an uncontrolled growth and division of cells, often leading to the formation of tumors.

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What is the S phase of the cell cycle?

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The S phase (synthesis phase) is the part of interphase where DNA replication occurs, resulting in two identical copies of the DNA.

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What triggers the formation of a tumor?

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A mutation in a gene that codes for a protein regulating cell division can trigger the formation of a tumor.

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What is the role of checkpoints in the cell cycle?

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Checkpoints are regulatory pathways that ensure the cell cycle progresses correctly and that any DNA damage is repaired before division.

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What is apoptosis?

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Apoptosis is the process of programmed cell death that eliminates damaged or unnecessary cells, playing a crucial role in maintaining healthy tissue.

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What is the difference between benign and malignant tumors?

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Benign tumors are non-cancerous growths that do not spread, while malignant tumors are cancerous and can invade nearby tissues and spread to other parts of the body.

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What is DNA replication?

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DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule, essential for cell division.