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In PS I the reaction centre chlorophyll ...

In PS I the reaction centre chlorophyll a has an absorption peak at 700 nm, hence is called (A)____ while in PS II it has absorption maxima at 680 nm and is called (B)____

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To answer the question regarding the absorption peaks of chlorophyll a in Photosystem I (PS I) and Photosystem II (PS II), we can break down the information step by step. ### Step-by-Step Solution: 1. **Understanding Photosystems**: - Photosystems are complexes in plants that play a crucial role in photosynthesis. They contain pigments that absorb light energy. 2. **Identifying PS I**: - In Photosystem I, the reaction center chlorophyll a has an absorption peak at 700 nm. This specific chlorophyll a is designated as **P700**. 3. **Identifying PS II**: - In Photosystem II, the reaction center chlorophyll a has an absorption peak at 680 nm. This chlorophyll a is designated as **P680**. 4. **Filling in the Blanks**: - Based on the absorption peaks: - (A) for PS I is **P700**. - (B) for PS II is **P680**. ### Final Answer: (A) P700 (B) P680 ---
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