Question:
What is the approximately average protein content (on dry weight basis) in potato?
What is the approximately average protein content (on dry weight basis) in potato?
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Although fresh potatoes are seen primarily as a carbohydrate source, their dry matter protein concentration is comparable to that of cereal grains (about 8%–12% dry basis).
Updated On: Jul 10, 2026
- %
- %
- 15%
- 20%
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
The nutritional composition of crops can be evaluated on a fresh weight basis (including water content) or a dry weight basis (after removing moisture).
Because potato tubers contain high amounts of water, their dry matter concentration is relatively small compared to their fresh weight.
Step 2: Detailed Explanation:
- On a fresh weight basis, a raw potato tuber contains about 78% to 80% water and 20% to 22% dry matter.
- Out of the fresh weight, the protein content is roughly 0%.
- To calculate the protein content on a dry weight basis: \[ \text{Protein \% (dry basis)} = \frac{\text{Protein \% (fresh basis)}}{\text{Dry matter \%}} \times 100 \] \[ \text{Protein \% (dry basis)} = \frac{0\%}{20\%} \times 100 \approx 10\% \] - On a dry weight basis, potato protein content typically ranges from 8% to 12%, with 10% being the standard average. This protein is of high nutritional quality due to a favorable balance of essential amino acids.
Step 3: Final Answer:
The average protein content of potato on a dry weight basis is approximately 10%.
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