Question

____ and ____ are unicellular algae, rich in proteins, that are used as food supplements even by space travellers.

• A. Chlorella, Spirulina
• B. Gelidium, Gracilaria
• C. Porphyra, Spirogyra
• D. Laminaria, Spirogyra

Answer 1

Answer: (A)

Chlorella, Spirulina

Chlorella (Green alga), as food supplement is rich in protein and carbohydrates. It yields about 30% proteins, 15% lipids, 30% carbohydrates and 5% ash. Spirulina platensis (blue-green alga) is one of the richest sources of protein and vitamin $B_2$. In long range space exploration, scientist have turned to Chlorella and Spirulina to use them as portable oxygen generators and food sources.