In which of the following biologically important compounds is magnesium the central metal ion?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Chlorophyll
Chlorophyll, the green pigment that traps sunlight for photosynthesis, is a coordination compound of magnesium. Haemoglobin has iron, vitamin B12 has cobalt and the enzyme carboxypeptidase-A has zinc at its centre.