Total Stown retardatioIT autu najUI CO115 uurbiological functions of copper: It helps in proper functioning of metalloenzymes Theascorbic oxidase, cytochrome oxidase, cerulopasmin, lysine oxidase, etc. It is an integral partof the oxygen transport pigment. Copper deficiency produced in animals is manifested bympaired growth of hair, anaemia with a reduction in cell number but normal haemoglobincontent and increased amount of free protoporphyrin in the erythrocytes, decreasedreproductive capacity and milk production. Deficiency of copper can interfere wal oxidative deamination of the epsilon amino groups of lysine and results in reducedformation of cross-linkages and desmosine in elastin. This change in the architecture ofelastin weakness the larger blood vessels which are normally rich in elastin and aneurysmand rupture can occur. Deficiency of copper (also iron and magnesium) in plants decreasesthe chlorophyll content since it is associated with the formation of chlorophyll. The toxiceffects of molybdenum and cadmium can be reduced by copper.Biological functions of magnesium: Magnesium is essential to all living organisms. Itis involved in maintaining the osmotic pressure balance, electrolytic balance and in theactivity of enzyme, hexokinase which is responsible for phosphate transfer reaction andglucose metabolism. Mg + ions also control more enzyme reactions. Mg+ ions are essentialfor synthesis of chlorophyll in plants because Mg2+ ion is present in chlorophyll.Magnesium is also involved in life processes like perbiotic condensations, proteinbiosynthesis, DNA replication, etc. For the proper organisation of the cell membranes Mg2+ions are also needed as they act as bridges between the neighbouring carboxylate groupsin lipoproteins as such bridgings stiffen the cell membranes.Role of Mg2+ ion in ATP (adenosine triphosphate): About all the transphosphorylationreactions involving ATP need the presence of Mg2+ ions.​