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| Q. |
Chlorophyll is porphyrin containing - |
| A. | magnesium |
| B. | iron |
| C. | calcium |
| D. | (4) tin |
| Answer» A. magnesium | |
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Explanation: Chlorophyll are greenish pigment which contain a porphyrin ring. This is a stable ring-shaped molecule around which electrons are free to migrate. Magnesium is central atom in porphyrin structure of chlorophyll. |
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