Cell Cycle Quiz for Biology Class 10
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Questions and Answers

Which phase of the cell cycle is most significant for DNA replication?

  • G2 phase
  • M phase
  • G1 phase
  • S phase (correct)

    • The majority of the cell cycle is spent in the M phase.

    False

    Who applied cell theory to explain the effects of diseases on tissues and organs?

    Rudolf Virchow

    The ______ phase is when the cell prepares for mitosis and ensures all conditions are met for division.

    <p>G2</p> Signup and view all the answers

    Match the following phases of the cell cycle with their descriptions:

    <p>G1 = Interval before DNA replication S = DNA synthesis G2 = Preparation for mitosis M phase = Division of the nucleus</p> Signup and view all the answers

    What is the role of the centrosome during the S phase?

    <p>It duplicates to prepare for cell division.</p> Signup and view all the answers

    Cytokinesis is the phase where the chromosomes are separated into daughter cells.

    <p>False</p> Signup and view all the answers

    What happens during the G0 stage of the cell cycle?

    <p>Cells do not grow or divide.</p> Signup and view all the answers

    What happens during prometaphase?

    <p>The nuclear envelope breaks down.</p> Signup and view all the answers

    Metaphase is the longest stage of mitosis.

    <p>False</p> Signup and view all the answers

    What is the role of the kinetochore during cell division?

    <p>It serves as the attachment point for spindle fibers to pull chromatids apart.</p> Signup and view all the answers

    The __________ stage of mitosis involves the formation of the new nuclear envelope.

    <p>telophase</p> Signup and view all the answers

    Which of the following accurately describes cytokinesis in animal cells?

    <p>It occurs after anaphase, involving a cleavage furrow.</p> Signup and view all the answers

    What does the mitotic index measure?

    <p>It measures the percentage of cells undergoing mitosis in a given population.</p> Signup and view all the answers

    Match the phase of mitosis with its description:

    <p>Prophase = Chromosomes condense and the mitotic spindle begins to form Anaphase = Sister chromatids are pulled apart towards opposite poles Cytokinesis = Division of the cytoplasm into two daughter cells Telophase = New nuclear envelopes form around the separated chromatids</p> Signup and view all the answers

    Sister chromatids are held together at the centromere by a protein complex called __________.

    <p>cohesion</p> Signup and view all the answers

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