Quiz Mitosis and the Cell Cycle

What is the first phase of mitosis?

• Metaphase

• Anaphase

• Prophase

• Telophase

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Which phase of mitosis involves the chromosomes lining up in the center of the cell?

• Prophase

• Metaphase

• Anaphase

• Telophase

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What is the primary role of spindle fibers during mitosis?

• To replicate DNA

• To separate chromosomes

• To dissolve the nuclear membrane

• To form the cell wall

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During which phase of mitosis do the sister chromatids separate and move to opposite poles of the cell?

• Prophase

• Metaphase

• Anaphase

• Telophase

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Explain how spindle fibers contribute to the equal distribution of chromosomes during cell division.

• They attach to the centromeres and pull sister chromatids apart.

• They dissolve the nuclear membrane.

• They replicate the DNA.

• They form the cell wall.

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Describe the changes that occur in the cell during telophase.

• Chromosomes condense and become visible.

• Chromosomes align at the cell equator.

• Chromosomes arrive at opposite poles and nuclear membranes reform.

• Chromosomes are pulled apart to opposite poles.

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How does the regulation of the cell cycle ensure proper cell division?

• By speeding up the process of mitosis

• By ensuring DNA is replicated only once per cycle

• By preventing the formation of spindle fibers

• By dissolving the nuclear membrane

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What might happen if spindle fibers do not function properly during mitosis?

• Chromosomes may not replicate.

• Chromosomes may not align properly, leading to unequal distribution.

• The nuclear membrane may not dissolve.

• The cell wall may not form.

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Analyze the consequences of a malfunction in cell cycle regulation.

• Cells may divide uncontrollably, leading to cancer.

• Cells may stop dividing altogether.

• Cells may become larger than normal.

• Cells may not replicate DNA.

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Predict the outcome if a cell skips the metaphase stage during mitosis.

• Chromosomes will not condense.

• Chromosomes may not be evenly distributed to daughter cells.

• The nuclear membrane will not reform.

• The cell will not grow.

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