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Which element is located at the centre of the porphyrin ring in chlorophyll?

1. Manganese
2. Calcium
3. Magnesium
4. Potassium

Correct answer: Magnesium

Solution

Chlorophyll molecules contain a porphyrin ring with a single central metal ion. In chlorophyll, that central ion is magnesium, which is essential for the molecule’s structure and function in photosynthesis.

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