Cells are always known to be the building blocks of life or the basic unit of life. It constitutes cytoplasm inside a membrane with which comprise biomolecules like nucleic acids and proteins. A cell has 3 major functions. One of these functions is to transport molecules. Since cell membrane acts as barriers to molecules, it should transport the molecules it needs. This transport can either be passive or active. Another cell function is to reproduce. Cell hast to reproduce to replace those that die. The last function is to convert energy. Through cellular respiration, cells produce energy. The absolute source of energy of all living organisms is the adenosine triphosphate or ATP.
