NEET 2023 Phase 2 · BiologyAlgaePrevious Year Question
Which classes of algae possess pigment fucoxanthin and pigment phycoerythrin, respectively?
Answer: (D) Phaeophyceae and Rhodophyceae. Answer: (D) Phaeophyceae and Rhodophyceae.
- A.Chlorophyceae and Rhodophyceae
- B.Rhodophyceae and Phaeophyceae
- C.Phaeophyceae and Chlorophyceae
- D.Phaeophyceae and Rhodophyceae✓
Correct Answer
(D) Phaeophyceae and Rhodophyceae
Solution & Explanation
Answer: (D) Phaeophyceae and Rhodophyceae. Solution: Fucoxanthin is the brown xanthophyll pigment of Phaeophyceae (brown algae) that gives them their colour, while phycoerythrin (r-phycoerythrin) is the red pigment predominating in Rhodophyceae (red algae). Therefore fucoxanthin and phycoerythrin belong to Phaeophyceae and Rhodophyceae respectively. NCERT Reference: Class XI Biology, Plant Kingdom, p.26-27 — "the xanthophyll pigment, fucoxanthin present in them" (Phaeophyceae, p.26 lines 44-45) and "red algae because of the predominance of the red pigment, r-phycoerythrin in their body" (p.27 lines 19-20).
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