The hydrophilic head of a chlorophyll molecule contains a porphyrin ring. Which metallic ion is coordinated at the center of this ring?
Q1. The hydrophilic head of a chlorophyll molecule contains a porphyrin ring. Which metallic ion is coordinated at the center of this ring?
Answer: Magnesium
Explanation: Magnesium is the central atom in the porphyrin ring. Iron is central to hemoglobin, which has a very similar structural arrangement.