Question:

Which of the following flavonoids is incorrectly grouped with its food source?
(A). Naringin-Citrus
(B). Quercetin-Onion
(C). Kaempferol-Broccoli
(D). Genistein-Berries
Choose the correct answer from the options given below:

Show Hint

Isoflavones like genistein and daidzein are highly specific to soybeans and other legumes, rather than berries.
  • (B) and (D) only.
  • (C) and (B) only.
  • (A) and (D) only.
  • (D) only.
Show Solution
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The Correct Option is D

Solution and Explanation



Step 1: Understanding the Concept:

Flavonoids are a diverse class of polyphenolic plant secondary metabolites widely found in fruits and vegetables, recognized for their antioxidant properties.

Step 2: Detailed Explanation:

- Naringin is a flavanone glycoside responsible for the bitter taste of grapefruit and other Citrus fruits. (A is correct)
- Quercetin is a prominent flavonol found in high concentrations in Onions. (B is correct)
- Kaempferol is a natural flavonol abundant in cruciferous vegetables like Broccoli. (C is correct)
- Genistein is an isoflavone phytoestrogen found almost exclusively in soybeans and other legumes, not in berries. (D is incorrect)
Thus, only group (D) is incorrectly matched.

Step 3: Final Answer:

Since only (D) is incorrect, Option D is the correct choice.
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