Question

Protein content in soybean is ______

• A. 30%
• B. 40-45%
• C. 60%
• D. 55%

Hint:

Soybean = King of plant proteins (40-45%). Compare with other legumes: Gram (20-25%), Pea (20-25%), Lentil (25-28%).

Answer 1

The Correct Option is B

Step 1: Understand the nutritional composition of soybean.
Soybean (Glycine max) is a legume that is exceptionally rich in protein. It is considered a complete protein source as it contains all essential amino acids.
Step 2: Recall the protein content of soybean.

• Soybean contains approximately 40-45% protein on a dry weight basis.
• This is the highest protein content among all legumes and most plant-based foods.
• Other nutrients in soybean include:
  • Oil: 18-22%
  • Carbohydrates: 20-30%
  • Fiber: 5-8%
  • Moisture: 8-10%

Step 3: Analysis of each option.

• (A) 30%: Incorrect. This is too low for soybean. Some other legumes like chickpea or lentil may have around 20-25% protein, but soybean is higher.
• (B) 40-45%: Correct.} This is the accurate protein content range for soybean.
• (C) 60%: Incorrect. This is too high. No common food crop has 60% protein content. Soy protein isolates can reach this level after processing, but not whole soybean.
• (D) 55%: Incorrect. This is higher than the actual protein content of whole soybean.

Step 4: Conclusion.
Soybean is renowned for its high protein content, typically ranging from 40% to 45%, making it an excellent source of plant-based protein for human consumption and animal feed. Final Answer:} (B) 40-45%