Question:
Curdling of milk is caused due to the formation of which of the following acids by bacteria?
Curdling of milk is caused due to the formation of which of the following acids by bacteria?
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Lactic acid is responsible for milk curdling; it's produced by bacterial fermentation of lactose.
Updated On: May 17, 2025
- Formic acid
- Acetic acid
- Lactic acid
- Maleic acid
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The Correct Option is C
Solution and Explanation
Bacteria such as Lactobacillus ferment lactose (milk sugar) to lactic acid.
This acid lowers the pH and causes the milk proteins (mainly casein) to coagulate, resulting in curdling.
\[ \text{Lactose} \xrightarrow{\text{bacteria}} \text{Lactic acid} \]
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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