It is an aqueous phase in which all the cytoplasmic organelles are suspended. Many proteins and numerous other solutes are found in cytoplasm. Some important metabolic processes that occur in the cytosol are glycolysis, gluconeogenesis, activation of amino acids, and fatty acid synthesis. The fluidity of cytosol is maintained by the process of hydration of protein molecules and by the presence of microproteins and microfilaments. Lactate dehydrogenase acts as a marker enzyme of cytoplasm.