Cell and it's Structure

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  • Q1

    “New cells arise from pre-existing cells” was given by

    Marks:1
    Answer:

    Virchow.

    Explanation:

    In 1855, one more point was added by Virchow to the cell theory, i.e., new cells arise from pre-existing cells. Hence, cells reproduce by dividing to give rise to new cells.

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  • Q2

    Vacuoles are larger in

    Marks:1
    Answer:

    plant cell.

    Explanation:
    The vacuoles occupy a large space in plant cell. Vacuoles are essentially enclosed compartments, which are filled with water containing inorganic and organic molecules.
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  • Q3

    In human body, longest cell is a

    Marks:1
    Answer:

    nerve cell.

    Explanation:
    Neuron or nerve cell is the longest cell in an animal body. Neuron can measure to about 1 metre in length. It consists of the dendrites, cell body and the axon.
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  • Q4

    The part of the cell that controls all activities of the cell is

    Marks:1
    Answer:

    nucleus.

    Explanation:
    Nucleus is a membrane-enclosed organelle found in eukaryotic cells. It contains most of the cell's genetic material, organised as the multiple long linear DNA molecules associated with proteins.
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  • Q5

    Smallest cell in size observed in bacteria is

    Marks:1
    Answer:

    mycoplasma.

    Explanation:
    Mycoplasma is the smallest cell having size of 0.1micron (ten thousandth part of a millimeter).
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