(i) Food processing: Amylase is used to make corn syrup from starch. Protease enzymes are used to reduce the protein content of biscuit dough. Cellulase is needed to process coffee. Catalase enzyme is used in the bakery industry to make sugar from starch.
(ii) Baby food: Trypsin is used to make baby food easier to digest.
(iii) In paper industry: Amylase is used in paper sizing and coating. Xylanase is used to reduce the amount of bleaching when decolorizing paper. Cellulase is needed to smooth the paper and reduce the water content of the paper. Ligninase enzyme is used to remove lignin from paper.
(iv) In Alcohol Industry: Amylase, Gluconase and Protease are used in the preparation of raw materials for alcohol. α amylase and β amylase are used in beer and wine making. Protease enzymes are used to remove turbidity in beer.
(v) In dairy industry: Rennin is used to make cheese from milk protein. In France, lipase is used to ripen sheep’s milk blue cheese. Lactase enzyme is required to make glucose and galactose from lactose.
(vi) In photography industry: Protease is used to clear gelatin from film.
(vii) In rubber industry: Catalase enzyme is required during manufacture of rubber from latex.
(viii) Biological detergents: Protease is used to remove protein stains from fabrics. Amylase is used to remove starch stains from clothes and dishes. Cellulase is used as a biological conditioner for fabrics. Lipase enzyme is used to remove oil and grease stains from fabrics.
(ix) In biofuel industry: Cellulase is used to produce ethanol in fermentation process.
(x) Ice cream making: Soft and malleable ice cream is made using lactase enzyme.
(xi) Candy making: Candy is made using invertase enzyme.
The use of enzymes in various research works including molecular biology is increasing day by day. Metabolism and life cannot exist without enzymes. So it can be said that the systemic activity of enzymes is life.