Differentiate between intrinsic and extrinsic proteins.

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Solution

Intrinsic proteins:
Intrinsic or integral proteins are the proteins that are embedded partially or completely within the plasma membrane.
Extrinsic proteins:
Extrinsic or peripheral proteins are the proteins that are present on the surface of the plasma membrane.
Intrinsic proteins Extrinsic proteins
Intrinsic proteins are the proteins that are embedded partially or completely within the plasma membrane.
Extrinsic proteins are the proteins that are present on the surface of the plasma membrane.
2. Intrinsic proteins are permanently attached to the plasma membrane. 2. Extrinsic proteins are temporarily attached to the plasma membrane.
3. Intrinsic proteins are also known as integral proteins. 3. Extrinsic proteins are also known as peripheral proteins.

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Which of the following statement(s) regarding cell membrane are true and which are false :

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II.It is made of the lipid bilayer.

III.It has both intrinsic and extrinsic proteins.

IV.Carbohydrates are absent.

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Intrinsic proteins	Extrinsic proteins
Intrinsic proteins are the proteins that are embedded partially or completely within the plasma membrane.	Extrinsic proteins are the proteins that are present on the surface of the plasma membrane.
2. Intrinsic proteins are permanently attached to the plasma membrane.	2. Extrinsic proteins are temporarily attached to the plasma membrane.
3. Intrinsic proteins are also known as integral proteins.	3. Extrinsic proteins are also known as peripheral proteins.