Discussion
Match the following algal pigments with their colour :
| Pigment | Colour |
|---|---|
| (a) Chlorophyll | 1. Orange |
| (b) Xanthophyll | 2. Green |
| (c) Carotenoid | 3. Blue green |
| (d) Phycocyanin | 4. Yellow |
Answer: A
The correct code is a-2, b-4, c-1, d-3.
- Chlorophyll: green, the main photosynthetic pigment.
- Xanthophyll: yellow, an oxygen-containing carotenoid.
- Carotenoid (carotene): orange.
- Phycocyanin: blue green, the pigment that gives blue-green algae (cyanobacteria) their colour.
The other codes go wrong at once: a-2, b-4, c-3, d-1 makes carotenoid blue green and phycocyanin orange, a-1, b-2, c-3, d-4 makes chlorophyll orange, and a-4, b-1, c-3, d-2 makes chlorophyll yellow.
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