Chlorophyll molecule contrains __________ as central metal ion.
Correct answer: B. Mg2+
- A. Fe2+
- B. Mg2+
- C. Zn2+
- D. Cu2+
Explanation
Chlorophyll is a magnesium-containing porphyrin pigment, so Mg2+ occupies its central position and helps absorb light energy. Iron is the central metal in haemoglobin, which causes the common confusion with chlorophyll. Therefore Fe2+ is not the metal ion in chlorophyll.
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