Cell Cycle Regulation

What are cell cycle checkpoints?

• Control mechanisms that ensure the integrity of the cell cycle.

• Structures that protect the cell from damage

• Proteins that promote cell death

• Processes that regulate cell division

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What are cyclin-dependent kinases (CDKs)?

• CDKs are enzymes that break down proteins.

• CDKs are molecules that control gene expression.

• CDKs are enzymes that regulate the cell cycle.

• CDKs are proteins that help in DNA replication.

How is the cell cycle regulated?

• The cell cycle is regulated by a complex network of proteins and checkpoints.

• The cell cycle is not regulated at all.

• The cell cycle is regulated by external factors such as weather.

• The cell cycle is regulated by random chance.

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What are tumor suppressor genes?

• Tumor suppressor genes are genes that only regulate cell division in certain types of cells.

• Tumor suppressor genes are genes that help regulate cell division and prevent the formation of tumors.

• Tumor suppressor genes are genes that promote cell division and encourage the formation of tumors.

• Tumor suppressor genes are genes that have no effect on cell division or tumor formation.

What are oncogenes?

• Oncogenes are genes that are only found in healthy individuals.

• Oncogenes are genes that are not involved in the development of cancer.

• Oncogenes are genes that prevent the development of cancer.

• Oncogenes are mutated forms of normal genes that can cause cancer.

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Which phase of the cell cycle is regulated by the G1 checkpoint?

• M phase

• S phase

• G2 phase

• G1 phase

What happens if a cell fails to pass the G2 checkpoint?

• The cell will continue to divide normally.

• The cell will either enter G0 phase or undergo apoptosis.

• The cell will enter the S phase.

• The cell will enter the M phase.

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How do cyclin-dependent kinases (CDKs) regulate the cell cycle?

• CDKs regulate the cell cycle by promoting the degradation of cyclins.

• CDKs regulate the cell cycle by forming complexes with cyclins and phosphorylating target proteins.

• CDKs regulate the cell cycle by directly controlling DNA replication.

• CDKs regulate the cell cycle by inhibiting the activity of cyclins.

What is the role of tumor suppressor genes in cell cycle regulation?

• Tumor suppressor genes promote the progression of the cell cycle and encourage the formation of tumors.

• Tumor suppressor genes inhibit the progression of the cell cycle and prevent the formation of tumors.

• Tumor suppressor genes only regulate the cell cycle in certain types of cells.

• Tumor suppressor genes have no role in cell cycle regulation.

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How do oncogenes contribute to abnormal cell cycle regulation?

• Oncogenes prevent cell division and promote cell death, leading to abnormal cell cycle regulation.

• Oncogenes promote uncontrolled cell division and inhibit cell death, leading to abnormal cell cycle regulation.

• Oncogenes have no effect on cell cycle regulation.

• Oncogenes promote normal cell division and inhibit cell death, leading to normal cell cycle regulation.

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