Differentiate globular and fibrous proteins.

1.	Differentiate globular and fibrous proteins.
Answer» (a) Globular proteins : They are soluble in water. The polypeptides are coiled and folded. Example : Enzymes, most of the hormones (Insulin, Thyrox-ine), Globins, Histones, Fibrinogen, Protamines, Glutelins etc. (b) Fibrous proteins : The are insoluble in water. Their molecules are long, thread-like and contractile. They are structural proteins. Examples : Collagen & Elastin (Found in tendons, cartilages, bones), Keratin (found in skin, nails, horn, hair, feathers), actin & myosin (found in muscles) etc.

Answer»

(a) Globular proteins : They are soluble in water.

The polypeptides are coiled and folded.

Example : Enzymes, most of the hormones (Insulin, Thyrox-ine), Globins, Histones, Fibrinogen, Protamines, Glutelins etc.

(b) Fibrous proteins : The are insoluble in water.

Their molecules are long, thread-like and contractile. They are structural proteins.

Examples : Collagen & Elastin (Found in tendons, cartilages, bones), Keratin (found in skin, nails, horn, hair, feathers), actin & myosin (found in muscles) etc.

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