Curdling of milk is caused due to the formation of which of the following acids by bacteria?
Show Hint
- Formic acid
- Acetic acid
- Lactic acid
- Maleic acid
The Correct Option is C
Solution and Explanation
This acid lowers the pH and causes the milk proteins (mainly casein) to coagulate, resulting in curdling.
\[ \text{Lactose} \xrightarrow{\text{bacteria}} \text{Lactic acid} \]
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