Question:

Which among the following is a rich source of vegetable protein?

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Soy protein is considered a "complete protein" because it contains significant amounts of all the essential amino acids required by the human body, unlike most other plant proteins which are deficient in lysine or methionine.
  • Wheat
  • Rice
  • Soybean
  • Groundnut
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The Correct Option is C

Solution and Explanation

Step 1: Understanding the Concept:
Legumes, cereals, and oilseeds serve as the primary sources of plant-based (vegetable) proteins in human nutrition.
Their protein concentration varies based on their biochemical composition.

Step 2: Detailed Explanation:

- Soybean (*Glycine max*) is an exceptional legume and oilseed. It contains approximately \(36\%\) to \(40\%\) protein on a dry weight basis, making it one of the richest and most complete plant-based sources of protein available.
- Groundnut (peanut) contains about \(25\%\) protein.
- Wheat contains about \(10\%\) to \(12\%\) protein (primarily gluten).
- Rice contains about \(7\%\) to \(8\%\) protein.

Step 3: Final Answer:

Therefore, the richest source of vegetable protein among the options is Soybean, corresponding to option (C).
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