Question

What are proteins? Describe the different biological functions of proteins.

Answer 1

There are two main sources of proteins. They are based on animals and plants. There are various types of proteins based on their functions - digestive enzymes, transport, defense, structural, hormones, contractile, storage. Proteins are very essential for the growth of the body and repair in the parts of the body.

Complete Answer:
Proteins are a group of macromolecules which perform a wide range of functions for the cell. They help in the metabolism by providing structural support and even by acting as enzymes, carriers, or hormones. Amino acids are the building blocks of proteins. A complete 20 different amino acids exist in proteins and hundreds to thousands of those amino acids are attached to each other in long chains to make a protein.
The functions of proteins are:
- They act as antibodies that bind to specific foreign particles, such as viruses or bacteria, to help protect the body.
- They act as enzymes by carrying all of the chemical reactions that take place in the cells.
Proteins which work as transport protein carry atoms and tiny molecules within cells and throughout the body.

Note: Lipids are molecules that contain hydrocarbons and make building blocks of structure and performance of living cells. Fats, Oils. Waxes, certain vitamins are examples of lipids. Most of the cell walls aren't made from proteins. Lipid could also be considered organic substances relatively insoluble in water, soluble in organic solvents (alcohol, ether etc.) actually or potentially associated with carboxylic acid and utilized by the living cells.