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Cell cycle

Class 11 · Biology · 5 questions

Name: ____________________   Date: ____________

  1. DNA replicates during which phase of interphase?

    • A G2
    • B S
    • C M
    • D G1

  2. Chromosomes become visible during:

    • A G1
    • B Interphase
    • C Prophase
    • D Cytokinesis only

  3. Sister chromatids separate during:

    • A Prophase
    • B Anaphase
    • C Metaphase
    • D Interphase

  4. Crossing over occurs in:

    • A Prophase I of meiosis
    • B Interphase
    • C Metaphase of mitosis
    • D Anaphase of mitosis

  5. Uncontrolled cell division results in:

    • A Meiosis
    • B Healing
    • C Growth only
    • D Cancer

Answer key

1. B, 2. C, 3. B, 4. A, 5. D

  1. The S phase is the synthesis phase.

  2. Chromatin condenses into visible chromosomes in prophase.

  3. They are pulled apart to opposite poles in anaphase.

  4. Homologous chromosomes exchange segments in prophase I.

  5. Cells that divide without control form tumours.