Cell Cycle Checkpoints Reading Comprehension

What is the purpose of cell cycle checkpoints?

• To ensure that cells divide under unfavorable conditions

• To regulate the cell cycle

• To speed up the cell division process

• To allow cancer cells to divide more quickly

At which stage of the cell cycle is the G1 checkpoint located?

• G2/M transition

• Metaphase to anaphase transition

• G1/S transition

• S phase

Which checkpoint is at the transition from metaphase to anaphase?

• G1 checkpoint

• G2 checkpoint

• Spindle checkpoint

• S phase checkpoint

Tags

NGSS.HS-LS1-4

What happens if a cell passes the G1 checkpoint?

• It exits the cell cycle

• It divides immediately

• It enters S phase and is committed to division

• It undergoes DNA repair

Tags

NGSS.HS-LS1-4

Which of the following is NOT a factor assessed at the G1 checkpoint?

• Cell size

• Nutrients

• Cell color

• DNA integrity

What does the G1 checkpoint assess regarding DNA integrity?

• If the DNA is replicating correctly

• If the DNA is fully replicated

• If any of the DNA is damaged

• If the DNA is visible under a microscope

What happens if a cell does not receive the necessary go-ahead cues at the G1 checkpoint?

• The cell enters the S phase.

• The cell divides immediately.

• The cell enters a resting state called G0 phase.

• The cell's DNA is replicated.

Tags

NGSS.HS-LS1-4

What does the G2 checkpoint check for before a cell enters the M phase?

• The quantity of cellular ATP.

• The completion of cytokinesis.

• DNA integrity and replication completeness.

• The presence of cellular nutrients.

What will happen if the G2 checkpoint mechanisms detect problems with the DNA?

• The cell cycle continues without interruption.

• The cell immediately enters the M phase.

• The cell cycle is halted and the cell will pause for repairs.

• The cell undergoes immediate apoptosis.

What may happen to a cell if the DNA damage is irreparable?

• The cell may undergo mitosis.

• The cell may undergo apoptosis.

• The cell may become cancerous.

• The cell may stop consuming nutrients.