Ncert Exercises & Solutions

14.15: Differentiate between globular and fibrous protein?

	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.	The polypeptide chain in this protein is folded around itself, giving rise to a spherical structure.
2	It is usually insoluble in water.	It is usually soluble in water.
3	Fibrous proteins are usually used for structural purposes. For example, keratin is present in nails and hair; collagen in	All enzymes are globular proteins. Some hormones such as insulin are also globular
	tendons; and myosin in muscles.	proteins.