Processing of photosynthate in the cytoplasm; metabolism of sucrose, starch and cellulose; Biochemistry of nitrogen fixation. Nitrate and nitrite reduction. Ammonia assimilation. Assimilation of inorganic sulphate: homocysteine. Enzymes of glutamate formation. Synthesis and interconversion of glycine, serine, Arginine. Sulphur amino acids and metabolism in plants. Aromatic amino-acids biosynthesis and its regulation. Histidline biosynthesis. Biosynthesis of non-protein amino acids; Plant LipidsPlant acyl lipids: structure, distribution. Membrane lipids: structure and function, degradation of acyl lipids. Hydrolytic and oxidative enzymes. Role of the glycoxylate cycle. Lipoxygen-ases. Biosynthesis of ethylene, saturated and unsaturated fatty acids, triacylglycerols, phospholipids, sulpholids and galactolipids; Biochemistry of terpenoids andcarotenoids. Bio-synthesis of sterols. Sterol interconversions. Biosynthesis of acetate-derived phenols (poly-ketides), cutin, suberin, waxes and cyclic fatty acids.