Choose if the given statement is true/false.

The pH of milk is 6 while that of curd is in the range of 4.5-5.5, which means the pH decreases as milk changes into curd.

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True

False

answer is A.

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Detailed Solution

The given statement is true.
Concept: Knowing that curd is a fermented milk product is important. Lactic acid is produced as a result of the fermentation of milk by lactic acid bacteria. Milk contains casein, a globular protein type. The curd is created chemically from casein and lactic acid bacteria.
During fermentation, the bacteria use enzymes to change lactose into ATP. A byproduct of the production of ATP is lactic acid. Lactic acid has an impact on milk's globular proteins, and denatured them.
Protein tertiary and quaternary structures are destroyed during this denaturation, and globular proteins are changed into fibrous proteins. Because of the coagulation of the proteins, the milk is consequently given a thick mixture.
Consequently, even though milk has a pH of 6, curd has a pH that is lower than 6. Curd has a pH between 4.5 and 5.5. Lactic acid is formed when milk turns into curd, which lowers the pH of the milk. Therefore, we might conclude that curd has a higher acidic content than milk.
Hence, the correct answer is option 1.

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