Cell, the basic structural and functional unit is composed of many cell organelles, i.e., ER, Golgi apparatus, ribosomes, mitochondria, chlroplasts etc., each with a specific function. Each of these organcells are made up of various moleclules such as proteins, lipids, enzymes, metallic ions like `Mg^(2+),Ca^(2+),Mn^(2+),Na^(+)` etc, which helps in the functioning of cell organelles.
e.g., molecular constituents like proteins `(60-70%),”lipids”(25-30%),”RNA”(5-7%)”NDA”,Mn^(2+)”ETS,ATP”` synthase, etc. found in mitochondria function togather in a coordinated way to carry out cellular respiration and release energy, thus making it power house of cell.
Thus, the molecular constituents of a cell organelle, forms the basis of its functioning irrespective of its individual molecular properties.