The four main categories of biomolecules are carbohydrates, lipids, proteins and nucleic acids. While there are some special cases to be found, these four molecules make up the bulk of living bodies, and each plays an essential role in regulating the body's chemistry.
Bacteria as a prokaryotic cell and prokaryotic cells do not have true nucleus or membrane bounded organelles. Therefore all biological activities takes place in the cytoplasm of the cell as well as the enzymes needed for the synthesis of fatty acid are found in the cytoplasm.
