a) Biotechnology helps in large scaled synthesis of life saving drugs like antibiotics, vaccines, artificial hormones. b) It helps in improvement of plant and animal breeds, pests and pathogen control in agriculture.c) It helps in the synthesis of acceptable additives (preservatives, colouring agents and artificial flavours) in food processing and management industries. d) It is used in synthesis of biocatalyst & biopolymers. e) It is used in pollution control, sewage treatment and water recycling. f) It is used to transfer nitrogen fixing gene from bacteria into plants which enable them to get nitrogen.