A) Chlorella
B) Spirogyra
C) Ulothrix
D) Gelidium
Correct Answer: D
Solution :
Gelidium, Gracilaria, Pterocladia are red algae having industrial importance. They produce a jelly like substane Agar-agar, used as culture medium with a number of different uses. Chlorella, a green algae contains 50% protein, vitamins. Antibiotic chlorellin has been extracted from Chlorella, found to be more effective against bacteria. Spirogyra, a green algae is also known as water-silk.
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