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: Identify Spirulina. Spirulina is a type of cyanobacteria (blue-green algae) that is cultivated and consumed as a food supplement.
Step 2: Recall its primary nutritional characteristic. Spirulina is most famous for its exceptionally high protein content. On a dry weight basis, the protein content of spirulina typically ranges from 55% to 70%.
Step 3: Compare this with the given options. The range of 50 - 60% is the most appropriate and conservative estimate among the choices provided that reflects this high protein value. While it can reach 70%, the 50-60% range is a very common and accepted value.