Q.

Chlorophyll is porphyrin containing -

A. magnesium
B. iron
C. calcium
D. (4) tin
Answer» A. magnesium
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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