Question

Spirulina, when grown under controlled conditions, should contain ________ protein on dry-weight basis

• A. 20 - 30 %
• B. 30 - 40 %
• C. 50 - 60 %
• D. 70 - 80 %

Hint:

Spirulina is a protein powerhouse. Its protein content (by dry weight) is significantly higher than that of meat (~25%), soybeans (~35%), or eggs (~13%). Remember the range 55-70%.

Answer 1

The Correct Option is C

Step 1: Spirulina Identification.Spirulina is a cyanobacterium (blue-green algae) grown and used as a dietary supplement.
Step 2: Key Nutritional Trait.Spirulina is well-known for its high protein levels. Its protein content typically varies from 55% to 70% when dry.
Step 3: Comparison with Answer Choices.The 50-60% range is the best, most conservative estimate among the options, reflecting spirulina's protein richness. Although it can reach 70%, 50-60% is a frequently cited and reliable figure.