AGAR — used for microbiology media and ice creams — is commercially obtained from:
ARed algae — Gelidium and Gracilaria
BGreen algae — Chlorella, Ulothrix
CBrown algae (Sargassum, Laminaria)
DBryophytes — Sphagnum
Answer & Solution
Correct answer: A. Red algae — Gelidium and Gracilaria
Agar comes from red algae Gelidium and Gracilaria. Brown algae yield algin (hydrocolloid); red algae also yield carrageen. Chlorella (green) is a protein food supplement. Sphagnum yields peat.
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