Botany - Cell - The Unit of Life Model Questions

11th Standard

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Biology

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 1 = 5
  1. The two subunits of ribosomes remain united at critical ion level of

    (a)

    Magnesium

    (b)

    Calcium

    (c)

    Sodium

    (d)

    Ferrous

  2. Keeping in view the fluid mosaic model for the structure of cell membrane, which one of the following statements is correct with respect to the movement of lipid and proteins from one lipid monolayer to the other

    (a)

    Neither lipid nor proteins can flip-flop

    (b)

    Both lipid and proteins can flip flop

    (c)

    While lipids can rarely flip-flop proteins cannot

    (d)

    While proteins can flip-flop lipids cannot

  3. _________ provides 3 dimensional images of surface of microscopic objects.

    (a)

    TEM

    (b)

    SEM

    (c)

    Phase Contrast microscope

    (d)

    Dark field microscope

  4. The term protoplasm was coined by______.

    (a)

    A Purkinje

    (b)

    Mohl

    (c)

    Schultze

    (d)

    Felix

  5. Janus Green is used to stain____

    (a)

    Starch

    (b)

    Nucleus

    (c)

    Mitochondria

    (d)

    Chromosome

  6. 5 x 2 = 10
  7. Bring out the significance of phase contrast microscopy.

  8. State the protoplasm theory.

  9. Name the two kinds of electron microscopes

  10. Define 'magnification' of a Microscope.

  11. What are nucleolar organisers?

  12. 5 x 3 = 15
  13. Distinguish between prokaryotes and eukaryotes.

  14. Differentiate the 70s Ribosomes and 80s Ribosomes.

  15. How are Chromosomes classified based on the position of centromere?

  16. Differentiate between Chromoplasts and Leucoplasts.

  17. What are the functions of Chloroplast?

  18. 4 x 5 = 20
  19. Difference between plant and animal cell.

  20. Draw the ultra structure of plant cell

  21. Discuss in detail about the physical properties of protoplasm.

  22. Describe the Fine Structure of a cell wall.

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