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Manganese is required in:

1. plant cell wall formation
2. photolysis of water during photosynthesis
3. chlorophyll synthesis
4. nucleic acid synthesis

Correct answer: photolysis of water during photosynthesis

Solution

Manganese is a key component of the oxygen-evolving complex in photosystem II, where it helps catalyze the splitting of water. This photolysis releases electrons, protons, and oxygen during photosynthesis.

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