Question:
In onions, pink color is due to……….
In onions, pink color is due to……….
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Pink/Purple/Blue in fruits and veg = Anthocyanin.
Orange = Carotene.
Yellow = Xanthophyll/Quercetin.
Red (in Tomatoes) = Lycopene.
Updated On: Aug 7, 2026
- Anthocyanin
- Carotene
- Xanthophyll
- Quercetin
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Question:
The question asks to identify the natural plant pigment responsible for the red, purple, or pink hues found in specific onion varieties.
Step 2: Detailed Explanation:
• Anthocyanins (Option A): These are water-soluble vacuolar pigments that can appear red, purple, or blue depending on the pH. In red/pink onions, anthocyanins are the primary pigments responsible for the outer skin and inner layer coloration.
• Quercetin (Option D): Onions are very rich in Quercetin, but it is a flavonol that typically contributes a yellow or pale color. It is more concentrated in yellow onions.
• Other Options: Carotene (Orange) and Xanthophyll (Yellow) are fat-soluble pigments common in carrots or corn but not the source of pink color in onions.
• Technical Note: The specific anthocyanins in onions are usually derivatives of cyanidin.
Step 3: Final Answer:
The pink/red color in onions is caused by anthocyanin pigments.
The question asks to identify the natural plant pigment responsible for the red, purple, or pink hues found in specific onion varieties.
Step 2: Detailed Explanation:
• Anthocyanins (Option A): These are water-soluble vacuolar pigments that can appear red, purple, or blue depending on the pH. In red/pink onions, anthocyanins are the primary pigments responsible for the outer skin and inner layer coloration.
• Quercetin (Option D): Onions are very rich in Quercetin, but it is a flavonol that typically contributes a yellow or pale color. It is more concentrated in yellow onions.
• Other Options: Carotene (Orange) and Xanthophyll (Yellow) are fat-soluble pigments common in carrots or corn but not the source of pink color in onions.
• Technical Note: The specific anthocyanins in onions are usually derivatives of cyanidin.
Step 3: Final Answer:
The pink/red color in onions is caused by anthocyanin pigments.
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