Photosynthesis: Pigments
Which pigment primarily absorbs blue and red light driving photosynthesis in higher plants?
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About This Question
- Subject
- biology
- Chapter
- plant physiology
- Topic
- photosynthesis: pigments
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Chlorophyll a
- Photosynthetic Pigments: Plants contain several pigments to harvest light energy.
- Reaction Center: Chlorophyll a is the essential, primary pigment found in the reaction centers of both Photosystem I and II.
- Absorption Spectrum: It absorbs light mostly in the blue-violet (≈430 nm) and red (≈660 nm) regions of the visible spectrum. It reflects green light, which is why leaves appear green.
- Accessory Pigments: Chlorophyll b, carotenoids, and xanthophylls absorb light at other wavelengths and transfer the energy to chlorophyll a.
This easy difficulty biology question is from the chapter plant physiology, covering the topic of photosynthesis: pigments. It appeared in the 2025 exam.
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