Question

Plasma membrane is fluid structure due to presence ofplasma membrane is fluid structure due to presence of ​

Answer 1

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Plasma membrane is fluid structure due to presence of plasma membrane is fluid structure due to presence of ​phospholipid bilayer.

Extra Info:

Plasma Membrane:

• Cell membrane or plasma membrane is the outer most covering of the cell that separates the contents of the cell from its external environment.

• It is present in both animal and plant cells.

• A semi permeable membrane is also called as a selectively permeable membrane.
• This membrane is being permeable to only certain molecules and not to all molecules.
• This membrane which allows the entry and exit of some materials in the cell but prevents the movement of some other substances.
• It is selectively permeable to ions and organic molecules and the movement of substances in and out of cells are controlled by plasma membrane.

Function of plasma membrane:

• It gives definite shape to the cell.
• It is selectively permeable membrane.
• It separates the content of cell from its surrounding medium.
• It regulates the movement of ions in an out of the cell.
• It provides mechanical barrier for the protection of the internal contents of the cell.

Answer 2

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Plasma membrane has fluid like structure due to presence of phospholipid bilayer and Proteins .

It's Features and functions or characteristics are given below :-

->It is the outermost living, thin , delicate covering of cell.

->It separates the contents of the cell from it's external environment .

->It allows the entry and exit of some selective materials out of the cell.

->It acts as an selectively permeable membrane also.

->It provides protection against microbes and foreign substances .

->It gets modified to perform different functions .

->It enables cell to engulf food and other materials from external environment through the process of Endocytosis .

->It also provides shape to the cell . -

>It is elastic also .

ex - Amoeba acquires food through this process , with the help of finger - like projections called Pseudopodia .