Which molecules act as gatekeepers for each checkpoint of the cell cycle?

• p53 gene

• cyclins and cycline-dependent kinases

• thyroid hormones

What is the purpose the the cell cycle checkpoints?

• To repair damaged cells before they enter cell division.

• To remove damaged cells from an organism.

How many cell cycle checkpoints are there?

• 1

• 2

• 3

• 4

What is the first checkpoint of the cell cycle?

• Mitosis checkpoint

• G₁ checkpoint

• G₂ checkpoint

When is apoptosis initiated?

• When DNA damage is repaired.

• When cells are removed from the cell cycle.

• When DNA damage cannot be repaired.

Which is an example of a tumor suppressor gene?

• apoptosis
• proto-oncogenes
• p53
• oncogenes

Tags

NGSS.HS-LS3-2

This is the cell cycle checkpoint that makes sure the correct number of chromosomes are present and attached to microtubules.

• G1 Checkpoint
• G2 Checkpoint
• M Checkpoint
• I Checkpoint

Name the 3 checkpoints of the cell cycle

• Anaphase checkpoint, mitosis/metaphase checkpoint, and telophase checkpoint

• Interphase checkpoint, S phase checkpoint, and M phase checkpoint

• G1 checkpoint, G2 checkpoint, and S phase checkpoint

• G1 checkpoint, G2 checkpoint, and mitosis/metaphase checkpoint

Which is a function of cyclins?

• Cyclins are carbohydrates that regulate DNA replication during the mitosis phase of the cell cycle.

• Cyclins are glycoproteins that repair DNA in the beginning of cell cycle.

• Cyclins are proteins that regulate when and how often a cell divides.

Tags

NGSS.HS-LS1-4

First stage of the cell cycle, during which a cell grows, matures, and replicates its DNA

• anaphase

• cytokinesis

• mitosis

• interphase