Hydrocolloid carrageen is obtained from :
- Chlorophyceae and Phaeophyceae
- Phaeophyceae and Rhodophyceae
- Rhodophyceae only
- Phaeophyceae only
Answer
(3) Rhodophyceae only
Solution
As per NCERT, certain marine brown and red algae produce large amounts of hydrocolloids (water-holding substances).
Algin is obtained from brown algae (Phaeophyceae) and carrageen from red algae (Rhodophyceae).
∴ Carrageen – Rhodophyceae only.
Answer: (3)