Cell-The Unit of Life


  1. Resolution power is the ability to









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    The ability to distinguish two close objects is called power of resolution.

    Correct Option: B

    The ability to distinguish two close objects is called power of resolution.


  1. Organelles can be separated from cell homogenate through









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    Centrifuge is an instrument used to create a centrifugal force. The homogenate of the cell organelles is allowed to undergo centrifugation by which different cell organelles get separated. This process is known as differential centrifugation.

    Correct Option: C

    Centrifuge is an instrument used to create a centrifugal force. The homogenate of the cell organelles is allowed to undergo centrifugation by which different cell organelles get separated. This process is known as differential centrifugation.



  1. Angstrom (Å) is equal to









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    Angstrom Å = 0.0001 µm 1Å
    = 10–10 m
    = 10–8 cm
    = 10–7 mm
    = 10–4 mm

    Correct Option: C

    Angstrom Å = 0.0001 µm 1Å
    = 10–10 m
    = 10–8 cm
    = 10–7 mm
    = 10–4 mm


  1. Cell wall is absent in :









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    Mycoplasma lacks cell wall.

    Correct Option: B

    Mycoplasma lacks cell wall.



  1. Which structures perform the function of mitochondria in bacteria?









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    In some bacteria (e.g., Bacillus subtilis) the plasma membrane form certain invaginations or infoldings called mesosomes in the cytoplasm. The mesosomes have various functions, viz., respiratory, secretory etc.

    Correct Option: D

    In some bacteria (e.g., Bacillus subtilis) the plasma membrane form certain invaginations or infoldings called mesosomes in the cytoplasm. The mesosomes have various functions, viz., respiratory, secretory etc.