Cell : The Unit of Life - Important Question Paper

11th Standard

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Biology

Time : 01:00:00 Hrs
Total Marks : 50

    Part A

    10 x 1 = 10
  1. The two subunits of ribosomes remain united at critical ion level of

    (a)

    Magnesium

    (b)

    Calcium

    (c)

    Sodium

    (d)

    Ferrous

  2. Sequences of which of the following is used to know the phylogeny

    (a)

    mRNA

    (b)

    rRNA

    (c)

    tRNA

    (d)

    Hn RNA

  3. Many cells function properly and divide mitotically even though they do not have

    (a)

    plasma membrane

    (b)

    cytoskeleton

    (c)

    mitochondria

    (d)

    plastids

  4. 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

  5. Match the columns and identify the correct option:

      Column I   Column II
    A Thylakoids 1. Disc-shaped sacs in Golgi apparatus
    B. Cristae 2. Condensed structure of DNA
    C. Cisternae 3. Flat membranous sacs in stroma
    D Chromatin 4. Infoldings in mitochondria
    (a)
    A B C D
    3 4 2 1
    (b)
    A B C D
    4 3 1 2
    (c)
    A B C D
    3 4 1 2
    (d)
    A B C D
    3 1 4 2
  6. Robert Hooke coined the term cell based on observation of_______

    (a)

    Cork

    (b)

    Bacteria

    (c)

    Cyano bacteria

    (d)

    Pus cells

  7. The term animalcules was used by______.

    (a)

    Pasteur

    (b)

    Dutrochet

    (c)

    Leeuwenhoek

    (d)

    Robert Hooke

  8. A patch stop carrier is a part of_______

    (a)

    Bright field microscope

    (b)

    Dark field microscope

    (c)

    Electron microscope

    (d)

    Phase contrast microscope

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

    (a)

    TEM

    (b)

    SEM

    (c)

    Phase Contrast microscope

    (d)

    Dark field microscope

  10. Choose the correct statement with regard to working of scanning electron microscope.
    (a) Glass slides are used
    (b) They work in a vacuum medium
    (c) The stubs are coated in gold
    (d) A 2-D picture is obtained.

    (a)

    i and ii

    (b)

    ii and iii

    (c)

    i and iv

    (d)

    (a) are wrong

  11. Part B

    6 x 2 = 12
  12. What is Endosymbiont theory?

  13. What is Cell Inclusions?

  14. What is Chromomeres?

  15. What is Point centromere?

  16. What is Holocentromere?

  17. What is microphotography?

  18. Part C

    6 x 3 = 18
  19. Differentiate between Chromoplasts and Leucoplasts.

  20. What are the functions of Chloroplast?

  21. How do peroxisomes perform photorespiration?

  22. What is Glyoxysomes?

  23. List out the function of cell wall

  24. Write down the functions of Golgi bodies.

  25. Part D

    2 x 5 = 10
  26. Describe the Fine Structure of a cell wall.

  27. What are the structural elements of endoplasmic reticulum? Explain in detail.

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