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Which one of the following is essential for photolysis of water?

1. Manganese
2. Zinc
3. Copper
4. Boron

Correct answer: Manganese

Solution

Manganese is a key component of the oxygen-evolving complex in photosystem II, where it participates directly in the photolysis of water. Without manganese, the light-driven splitting of water and release of oxygen cannot proceed normally.

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