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Which one of the following statements is wrong?

1. Agar - agar is obtained from Gelidium and Gracilaria
2. Chlorella and Spirulina are used as space food
3. Mannitol is stored food in Rhodophyceae
4. Algin and carragen are products of algae

Correct answer: Mannitol is stored food in Rhodophyceae

Solution

Rhodophyceae (red algae) store floridean starch, not mannitol. Mannitol is a reserve food commonly found in brown algae, so that statement is wrong.

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