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Cell The Unit o...

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  • Question 1
    1 / -0

    Cell organelle responsible for autolysis is

  • Question 2
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    Which of the following not represents the features of lysosomes?

  • Question 3
    1 / -0

    Which group of organelles is involved in synthesis of substances needed by cell?

  • Question 4
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    Select the correct option:

    Mesosomes are the infoldings of cell membrane, which
    (i) are present in both prokaryotic and eukaryotic cells.
    (ii) help in cell wall formation, DNA replication and respiration.
    (iii) increase the surface area of plasma membrane.

  • Question 5
    1 / -0

    Lysosomes are _________ vesicular structures formed by the process of packaging in the _________.

  • Question 6
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    A piece of liver tissue is homogenized in a laboratory and the homogenate is subjected to sequential centrifugation at increasing speeds (expressed in xg). Centrifugation is used to separate sub-cellular components based on size and density. The steps carried out in the experiment are shown.
    Sediments $$1, 2$$ and $$3$$ would most likely contain.

  • Question 7
    1 / -0

    As they release hydrolase that digest old and damaged cells, the term suicide bags is aptly used by cell biologists for

  • Question 8
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    Read the given statements.
    (i) Flat membranous sacs in stroma of chloroplasts
    (ii) Infoldings in mitochondria
    (iii) Disc shaped sacs in Golgi apparatus
    Select the correct option as per the codes given above.

  • Question 9
    1 / -0

    The presence or absence of certain sub-cellular components in the cells of three organisms (P, Q and R) is given.

    Sub-cellular componentPQR
    Ribosomespresentpresentpresent
    Mitochondriapresentabsentpresent
    Mitochondriapresentabsentpresent
    Lysosomespresentabsentpresent
    Vacuolesmany small-sizedabsentsingle large-sized
    P, Q and R could most likely be.

  • Question 10
    1 / -0

    __________ are granular structures first observed under electron microscope as dense particles by ______ $$(1955)$$.

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