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Class 12
Chemistry
Biomolecules
differentiate between globular and fibrous protein...

Question:
Differentiate between globular and fibrous proteins.

Answer:

Fibrous protein		Globular protein
1.	It is a fibre-like structure formed by the polypeptide chain. These proteins are held together by strong hydrogen and disulphide bonds.	1.	The polypeptide chain in this protein is folded around itself, giving rise to a spherical structure.
2.	It is usually insoluble in water.	2.	It is usually soluble in water.
3. 4. 5.	Fibrous proteins are usually used for structural purposes. For example, keratin is present in nails and hair; collagen in tendons; and myosin in muscles. Fibrous proteins are made up of regular amino acid proteins. Fibrous proteins are less sensitive to any changes in pH or temperature.	3. 4. 5.	All enzymes are globular proteins. Some hormones such as insulin are also globular proteins. The amino acid sequece is irregular in globular proteins. Globular proteins are sensitive to any changes in pH, temperature etc.

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Question:
Differentiate between globular and fibrous proteins.