Find the incorrect statement about algae.
- A*Chlorella* is used as space food
- BAlgin is produced by algae
- C'Agar-agar' is produced from *Gracilaria*
- DMannitol is a food reserve of red algae
Show answer and explanation
Correct answer: (d) Mannitol is a food reserve of red algae
Explanation
Statement (d) is incorrect: mannitol (with laminarin) is the food reserve of the brown algae (Phaeophyceae). Red algae store floridean starch.
The other statements are correct:
- *Chlorella*, a green alga rich in protein, has been studied as a food for space travellers;
- algin comes from brown algae;
- agar-agar is extracted from red algae such as *Gracilaria* and *Gelidium*.