Which microbes are responsible for imparting sourness to milk?

Lactobacillus lactis

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Lactobacillus cremoris

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Streptococcus thermophilus

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Acetobacter

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Solution

The correct options are
A Lactobacillus lactis
B Lactobacillus cremoris
C Streptococcus thermophilus
Microbes such as Lactobacillus lactis, Lactobacillus cremoris, and Streptococcus thermophilus are mainly responsible for imparting sourness to milk. They convert lactose to lactic acid. Acid production leads to decrease in pH, causing milk proteins to seperate from other constituents forming a coagulum.

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