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G2 Checkpoint and Cell Cycle Quiz

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Questions and Answers

What signals the beginning of mitotic cell division if the DNA has been correctly replicated?

Cyclin Dependent Kinases (CDKs) (correct)

Telomerase

Cyclin Inhibitors (CKIs)

DNA Polymerase

What is the main function of the G2 checkpoint?

To repair damaged DNA

To signal the completion of DNA replication

To initiate mitotic cell division

To ensure accurate replication of all chromosomes (correct)

What happens if the G2 checkpoint detects problems with the DNA?

The cell skips the mitotic phase

The cell undergoes apoptosis

The cell cycle is halted for DNA replication or repair (correct)

The cell immediately enters into mitotic phase

When does the G2 checkpoint prevent the cell from entering into the mitotic phase?

If certain conditions are not met (A) Signup and view all the answers

What is the main role of the G2 checkpoint in the cell cycle?

To ensure accurate replication of chromosomes (A) Signup and view all the answers

When do cyclin dependent kinases (CDKs) signal the beginning of mitotic cell division?

After accurate replication of chromosomes (C) Signup and view all the answers

What happens if the G2 checkpoint detects problems with the DNA?

The cell cycle is halted for DNA replication or repair (C) Signup and view all the answers

Study Notes

Cell Cycle Checkpoints

The G2 checkpoint ensures that the DNA is correctly replicated before entering mitotic cell division.

G2 Checkpoint Function

The main function of the G2 checkpoint is to verify DNA integrity before the cell enters the mitotic phase.

G2 Checkpoint Response to DNA Damage

If the G2 checkpoint detects problems with the DNA, it prevents the cell from entering the mitotic phase.
This pause allows for DNA repair mechanisms to correct the damage before proceeding.

CDKs and Mitotic Cell Division

Cyclin-dependent kinases (CDKs) signal the beginning of mitotic cell division if the DNA has been correctly replicated.

G2 Checkpoint Role in the Cell Cycle

The main role of the G2 checkpoint is to ensure that the cell has a complete and accurate set of chromosomes before entering mitotic cell division.

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Description

Test your knowledge about the G2 checkpoint in the cell cycle, which ensures accurate replication of chromosomes and checks for DNA damage before entering mitosis. Learn about the conditions that must be met for cells to proceed to the mitotic phase and the mechanisms involved when DNA problems are detected.