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    Home >> Biology >> The Fundamental Unit Of Life II

    The Fundamental Unit Of Life II

    Why is plasma membrane also known as the selectively permeable membrane?

    Plasma membrane is called selectively permeable membrane because it allows the movement of only selected molecules across it and not all of them.

    Name two organisms that contain their own genetic material

    Mitochondria, Chloroplasts

     If the organization of a cell is destroyed due to some physical or chemical influence what will happen?

    If the organization of a cell is destroyed, it will not be able to maintain homeostasis and this will not be able to perform its basic functions and the lysosomes will digest the cell.

    Where are proteins synthesized inside the cell?

    Proteins are synthesized on ribosomes. They are then sent to various places in the cell depending on need using the endoplasmic reticulum.

    How does Amoeba obtain their food?

    Amoeba engulfs its food through the process of endocytosis.

    What is cell wall?

    Plant cell have a rigid outer covering called the cell wall. The cell wall lies outside the plasma membrane. The plant cell wall is mainly composed of cellulose. It is permeable and is dead layer. Its main function is to provide the plant mechanical strength and shape. Cell walls permit the cell of plant, fungi and bacteria to withstand very dilute external media without bursting. The cell swells building up pressure against the cell wall. The wall exerts an equal pressure against the swollen cell. Because of their walls, such cells can withstand much greater changes in the surrounding medium than animal cells.

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