The GATE Grind

GATE 2021 AG – Question 20

Dairy and Food Engineering · Preservation of Food · 1 mark · Multiple choice

The fishy flavour defect of butter is associated with decomposition of ______.

  1. α-lactalbumin
  2. β-lactoglobulin
  3. Casein
  4. Lecithin

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Show answer and explanation

Correct answer: (D) Lecithin

Explanation

**Lecithin, D** is the relevant phospholipid. Degradation of its choline-containing component can generate amine compounds associated with fishy odours. The other listed substances are milk proteins and do not identify this standard butter-flavour defect mechanism.

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