Question

Keratin, insulin, and myosin are a few examples of proteins present in the human body. Identify which type of protein is keratin and insulin and differentiate between them based on their physical properties.

Answer 1

	Keratin	Insulin
1.	Keratin is a fibrous protein.	Insulin is a globular protein.
2.	It forms a structure similar to a fibre.	This structure results when the chains of polypeptides coil around to give a spherical shape.
3.	Such proteins are generally insoluble in water.	These are usually soluble in water.