Multiple choice

Process involved in the conversion of milk to curd is

  1. oxidation

  2. dehydration

  3. hydrogenation

  4. fermentation

  5. hydration
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Milk converts to curd (yogurt) through fermentation by lactic acid bacteria (primarily Lactobacillus species). Oxidation involves electron loss, dehydration removes water, hydrogenation adds hydrogen, and hydration adds water - none of these describe the microbial action that curdles milk.

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