AP BIOLOGY

BIOCHEMISTRY

ENZYMES AND METABOLISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Rennin is derived from the stomach of a calf used in manufacturing of cheese. What is the function of rennin in cheese making industry?
A
Coagulates milk into cheese
B
Slows down the time for milk to coagulate
C
Gives cheese a good taste and texture
D
Converts caseinogen into casein
Explanation: 

Detailed explanation-1: -rennin, also called chymosin, protein-digesting enzyme that curdles milk by transforming caseinogen into insoluble casein; it is found only in the fourth stomach of cud-chewing animals, such as cows. Its action extends the period in which milk is retained in the stomach of the young animal.

Detailed explanation-2: -Chymosin, known also as rennin, is a proteolytic enzyme related to pepsin that synthesized by chief cells in the stomach of some animals. Its role in digestion is to curdle or coagulate milk in the stomach, a process of considerable importance in the very young animal.

Detailed explanation-3: -It is responsible for the coagulation of milk in infants.

Detailed explanation-4: -The renin–angiotensin system (RAS) is a hormone system that is involved in the regulation of the plasma sodium concentration and arterial blood pressure.

Detailed explanation-5: -Being a proteolytic enzyme, the major function of rennin is to curdle milk. Rennin is produced in large amounts, immediately after the birth. Its production gradually decreases, and it is replaced by a digestive enzyme called pepsin. Rennet is known to play an important role in coagulation and curdling of milk.

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