Cell Cycle and Mitosis

What is the purpose of interphase in the cell cycle?

• To produce energy for the cell

• To prepare the cell for division

• To repair damaged DNA

• To remove waste products from the cell

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During which phase of the cell cycle does DNA replication occur?

• G1 phase

• G2 phase

• M phase

• S phase

What are the main events that occur during prophase?

• Chromatin decondenses into chromatin, nuclear membrane breaks down, centrosomes move to the same pole, spindle fibers form

• Chromatin condenses into chromatin, nuclear membrane remains intact, centrosomes move to the same pole, spindle fibers form

• Chromatin condenses into chromosomes, nuclear membrane breaks down, centrosomes move to opposite poles, spindle fibers form

• Chromatin condenses into chromosomes, nuclear membrane remains intact, centrosomes move to the same pole, spindle fibers do not form

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What is the role of the spindle fibers in metaphase?

• Spindle fibers assist in the replication of DNA during metaphase.

• Spindle fibers separate the chromosomes during metaphase.

• Spindle fibers help to condense the chromosomes during metaphase.

• Spindle fibers anchor the chromosomes to the cell membrane during metaphase.

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What happens to the sister chromatids during anaphase?

• The sister chromatids remain attached to each other.

• The sister chromatids separate and move towards opposite poles of the cell.

• The sister chromatids disintegrate and are absorbed by the cell.

• The sister chromatids move towards the same pole of the cell.

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NGSS.HS-LS1-4

What is the significance of telophase in mitosis?

• Telophase is the stage where the cell divides into two daughter cells.

• Telophase is the stage where the chromosomes condense and become visible.

• Telophase is the stage where the cell prepares for cytokinesis.

• Telophase is the final stage of mitosis where the separated chromosomes reach the opposite poles of the cell and new nuclear membranes form around them.

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What are the three stages of interphase?

• G1 phase, S phase, and G2 phase

• G1 phase, S phase, and M phase

• G1 phase, M phase, and G2 phase

• M phase, S phase, and G2 phase

What is the function of the centrosomes in prophase?

• Regulate gene expression

• Organize and separate the duplicated chromosomes

• Facilitate cell division

• Initiate DNA replication

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NGSS.HS-LS1-4

How does metaphase ensure proper alignment of chromosomes?

• Chromosomes align randomly during metaphase.

• Metaphase does not play a role in aligning chromosomes.

• Metaphase ensures proper alignment of chromosomes by pulling them apart.

• Spindle fibers attach to centromeres and align chromosomes along the equatorial plane.

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NGSS.HS-LS1-4

What is the difference between mitosis and cytokinesis?

• Mitosis is the division of the cytoplasm, while cytokinesis is the division of the nucleus.

• Mitosis and cytokinesis are both involved in the replication of DNA.

• Mitosis is the division of the nucleus, while cytokinesis is the division of the cytoplasm.

• Mitosis and cytokinesis are the same process.

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