Question

What are the five main functions of proteins?

Answer 1

Proteins:

• Protein is the nutrient that is used in building, repairing, and maintaining body tissues.
• Every tissue and fluid in the body contains protein except bile and urine.
• A protein is made up of amino acids, carbon, hydrogen, carbohydrates, and oxygen.

Functions of proteins:

• The digestive enzymes are made up of proteins that are useful in carrying out digestion.
• The protein acts as a chemical messenger for the interaction between cells, tissues, and organs.
• Regeneration and creation of DNA molecules are done with the help of proteins.
• Receptors are made up of proteins that help in the interaction of a cell with other cells and the external environment.
• The immune system uses antibodies for repairing body cells which are mainly made up of proteins.

The sources of proteins are given in the image.