Question

What are the major types of protein function?

	A.	Signal (hormone)
	B.	Regulatory
	C.	Transport
	D.	Defense
	E.	Structural
	F.	Energy source
	G.	Receptor
	H.	Storage
	I.	Conductive (electrically)
	J.	Enzymatic

Answer 1

Proteins are the polypeptides made from amino acids. They have various function such as-

A. Signal (hormone) - The hormones are the protein-derived chemical messengers synthesized from endocrine glands. For example- insulin.

C. Transport - These protein molecules are responsible for carrying important molecules from one site to another. For example - hemoglobin is responsible for carrying oxygen to the tissues.

D. Defense - Protein molecules of this type are found in immune system. For example - antibodies

E. Structural - These protein molecules are responsible for making structural framework. For example - Collagen is present in bones, muscles, and tendons. Keratin is present in hairs, and nails.

G. Receptor - The receptor molecules are present on the outer side of cells, where they regulate the coming and exit of various substances.

H. Storage - Proteins having this function are involved in storing of mineral ions. For example- Ferritin is a storage protein responsible for storing iron.

J. Enzymatic - Proteins are enzymatic in nature. These molecules are involved in accelerating the chemical reactions, which would occur very slowly without the presence of enzymes.

Hence, these are the major functions of proteins.

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