|Consider the following statements about useful Algae.|
|1. Chlorella and Synechococcus are useful for astronauts as food.|
|2. Chlorellin is obtained from Chlorella, Cladophora and Lyngbya possess antiviral properties.|
|3. Agar-agar is obtained from certain red algae such as Gelidium, Gracilaria.|
|Which of the statements given above are correct?|
A) 2 and 3
B) 1 and 2
C) 1 and 3
D) All of these
Correct Answer: D
Solution :[d] Chlorella and Synechococcus are useful for astronauts as food, They multiply rapidly and thus, will synthesise a rich harvest of food utilising and liberating sufficient oxygen as a byproduct far the use of astronauts. Chlorellin (antibiotics) is obtained from Chlorella, Cladophora and Lyngbya a possess antiviral properties. Chlorellin, contained in Chlorella, acts like a natural antibiotic. Agar-agar is obtained from certain red algae such as Gelidium, Gracilaria, Gigartina etc. Agar- agar is also used in certain medicine, cosmetics, culture media, leather media, leather industry, textile industry; baked food, meat industry and as emulsifier in dairy products.
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