Question

What are three functions of proteins?

Answer 1

Proteins perform a vast array of functions within organisms.

Explanation:

catalysing metabolic reactions, DNA replication, responding to stimuli, and transporting molecules from one location to another.
1.Building blocks
Proteins make up the hair, nails, muscles etc

1. hormones
   Many hormones are protein in nature; hormones control growth and metabolic activities of the body.

2. catalytic activities
   Enzymes are globular protein. Enzymes speed up the biochemical reactions and help in digestion.

3. Transport of oxygen
   A protein called haemoglobin contain iron atom which temporarily links with oxygen and releases it throughout the body.

4. Blood Clotting
   Fibrinogen is a glycoprotein which helps in healing of wounds. Thus it prevents the blood loss and inhibits the passage of germs

5. Immunity
   Antibodies are proteins that bind to the pathogens and inhibit their activities.

6. Muscles contractility
   Some proteins are responsible for muscles contractility and movement.