Topics:
Animal Refresher, Poultry Science
Greenish Colour in Egg White
The greenish colour in egg white (albumin) is usually due to:
- Carotene
- Riboflavin — Correct Answer
- Xanthophyll
- Iron sulfide (FeS)
Explanation:
Correct Answer: Riboflavin
Riboflavin (Vitamin B₂) is responsible for the characteristic greenish-yellow tint of egg albumin (egg white). Riboflavin is a yellow-green fluorescent pigment naturally present in egg white.
Egg Colour Chart
- Yolk yellow/orange: Carotene and xanthophylls
- Albumin greenish tint: Riboflavin (Vitamin B₂)
- Darkening of hard-boiled yolk: Iron sulfide (FeS) — from H₂S reacting with iron
- Skin/shank yellow: Xanthophyll deposited from feed
The riboflavin content of egg white also makes eggs a good dietary source of Vitamin B₂, contributing to energy metabolism and maintenance of mucous membranes.
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This multiple choice question is from Animal Refresher, Poultry Science. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
