Botany - Cell Cycle Book Back Questions

11th Standard

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Biology

Time : 00:45:00 Hrs
Total Marks : 25
    7 x 1 = 7
  1. The correct sequence in cell cycle is

    (a)

    S-M-G1-G2

    (b)

    S-G1-G2-M

    (c)

    G1-S-G2-M

    (d)

    M-G-G2-S

  2. If mitotic division is restricted in G1 phase of the cell cycle then the condition is known as

    (a)

    S Phase

    (b)

    G2 Phase

    (c)

    M Phase

    (d)

    Go Phase

  3. Anaphase promoting complex APC is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in human cell, which of the following is expected to occur?

    (a)

    Chromosomes will be fragmented

    (b)

    Chromosomes will not condense

    (c)

    Chromosomes will not segregate

    (d)

    Recombination of Chromosomes will occur

  4. In S phase of the cell cycle

    (a)

    Amount of DNA doubles in each cell

    (b)

    Amount of DNA remains same in each cell

    (c)

    Chromosome number is increased

    (d)

    Amount of DNA is reduced to half in each cell

  5. Centromere is required for

    (a)

    transcription

    (b)

    crossing over

    (c)

    cytoplasmic cleavage

    (d)

    movement of Chromosome towards pole

  6. The paring of homologous Chromosomes on meiosis is known as

    (a)

    Bivalent

    (b)

    Synapsis

    (c)

    Disjunction

    (d)

    Synergids

  7. Anastral mitosis is the characteristic feature of

    (a)

    Lower animals

    (b)

    Higher animals

    (c)

    Higher plants

    (d)

    All living organisms

  8. 1 x 2 = 2
  9. Write any three significance of mitosis.

  10. 2 x 3 = 6
  11. Differentiate between mitosis and meiosis

  12. Given an account of G0 phase.

  13. 2 x 5 = 10
  14. Differentiate cytokinesis in plant cells and animal cells.

  15. Write about Pachytene and Diplotene of Prophase I.

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