Question

An Enzyme used in cheese making is:
A) Protease
B) Rennet
C) Glucoamylase
D) Lactase

Answer 1

Hint: It is the set of enzymes which are produced in the stomach of ruminant mammals. Chymosins is its key product which is a protease enzyme that helps in curdling of casein in milk.

Complete answer: Rennet is the enzyme which is used in cheese making, in addition to chymosin, rennet contains many other enzymes too like pepsin and lipase. Rennet separates the solid curd and whey from milk.
-Protease is the enzyme that is used in bottled fruit juices as they are more clearer than the one prepared in our homes.
-Glucoamylase is one of the oldest used catalysts in the food industry which is used to remove the glucose residues from the non-reducing part of starch. Naturally, it is produced in the pancreas.
-Lactase, which is also known as Beta-galactosidase is an enzyme which is mainly found in bacteria, yeast, and animal. Its function is to hydrolyze the lactose into glucose and galactose, It is mainly used in dairy industries.
So, the correct answer is (B).
Additional information:
There are two types of cheese ‘Swiss cheese’ and ‘Roquefort cheese’. Swiss cheese is formed by the action of bacteria “Propionibacterium shermanii” while the latter is formed by the action of fungi.
Apart from these, microbes are useful to us in any way. Example: Lactobacillus and other bacteria commonly called LAB (lactic acid bacteria) convert milk into curd which is very beneficial for us. It is rich in vitamins B12. Microbes are also very useful in the preparation of dosa and idli as their dough is fermented by the bacteria and the dough of bread is mixed with yeast, Saccharomyces cerevisiae and hence it is called baker’s yeast.

Note: Microbes are also used for the treatment of sewage through STP (Sewage treatment plant) and it is also used for the production of biogas, commonly known as gobar gas. Bacteria involved in this is methanobacterium which produces a large amount of methane gas and this is the main component of gobar gas.