NEET 2021 · BiologyAlgaePrevious Year Question
Which of the following algae produce Carrageen?
Answer: (A) Red Algae. Answer: (A) Red Algae.
- A.Red Algae✓
- B.Blue-Green Algae
- C.Green Algae
- D.Brown Algae
Correct Answer
(A) Red Algae
Solution & Explanation
Answer: (A) Red Algae. Solution: Carrageen is a commercially used hydrocolloid (water-holding substance) produced by certain marine red algae (Rhodophyceae). Brown algae instead yield algin, while blue-green algae are not even classed as algae in the current scheme and green algae produce no such hydrocolloid. NCERT directly attributes carrageen to red algae and algin to brown algae. NCERT Reference: Class XI Biology, Plant Kingdom, p.26, lines 10-12 — "Certain marine brown and red algae produce large amounts of hydrocolloids (water holding substances), e.g., algin (brown algae) and carrageen (red algae)".
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