What are the functions of biomolecules?

The four major types of biomolecules include proteins, carbohydrates, nucleic acid, and lipids. Each of these biomolecule types has a distinct suite of functions. 

1. Proteins play a key role in transporting nutrients across the cell membrane, supporting the growth and repair of body tissues, enabling the movement of muscles, fighting various infectious organisms, and encouraging blood clotting in case of an injury. 
2. Carbohydrates act as key structural components in the cell wall of plants, bacteria, fungi and protists. They also help in lubricating the joints between bones and act as reserve food materials in plants and animals in the form of starch and glycogen respectively. 
3. Nucleic acids are pivotal to the growth, maintenance, and division of cells. They also act as genetic material, transferring hereditary characteristics from one generation to the next. 
4. Lipids or fat provide insulation to the body and act as reserve food materials in mammals. They also provide crucial shock-absorption in the eyeballs and kidneys.