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Which of the following statements is not...

Which of the following statements is not true for plasma membrane

A

It is present in both plant and animal cell

B

Lipid is present as a bilayer in it

C

Proteins are present integrated as well as loosely associated with the lipid bilayer

D

Carbohydrate is never found in it

Text Solution

Verified by Experts

Statement is false.
Carbohydrates are never found in plasma membrane is not true. The biochemical investigation done on cell membrane clearly demonstrate that the cell membrane possess protein and carbohydrates as biochemical components.
The other options stand true for plasma membrane
Plasma membrane is present in both plant and animal cells. Lipid is present as a bilayer and lipid component is made of phosphoglycerides (fluid mosaic model by Singer and Nicolson).
Proteins are present integrated as well as loosely associated with the lipid bilayer. The ratio of protein and lipid varies considerably in different cell types.
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Knowledge Check

  • Which of the following statements is not true for the cell membrane ?

    A
    It is preesent oin both plant and animal cells.
    B
    Lipids are present in it as bilayer .
    C
    Proteins may be peripheral or integral in it.
    D
    Carbonhydrates are never found in it.

  • Which of the following is not true concerning the plasma membrane?

    A
    It is responsible for maintaining an electrochemical gradient between the inside and outside of the cell
    B
    It is composed of folds known as cristae
    C
    It is composed of phospholipids and proteins
    D
    It helps protect the internal contents of the cell

  • Which statement is true about the plasma membrane?

    A
    Proteins make up the matrix of the membrane
    B
    Model can be likened to a sandwich where phospholipids are like the bread and proteins are like the filling
    C
    Fluid nature of the membrane is regulated by flip flopping of the phospholipids from one side of the membrane to the other
    D
    Movement of proteins and phospholipids can occur sideways within the plane of the membrane

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