Mg is present in - DASH

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Mg is present in

chlorophyll

haemoglobin

vitamin-D

vitamin-B

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Explanation for the Correct Answer 1. Introduction Magnesium (Mg) is an alkaline earth metal (an s-block element). One of its most important biological roles is in chlorophyll, the green pigment found in plants. 2. Role of Magnesium in Chlorophyll Chlorophyll is a complex molecule crucial for photosynthesis. It contains a central magnesium ion, which helps absorb light energy in the visible spectrum for converting carbon dioxide and water into glucose and oxygen. 3. Structure of Chlorophyll The general formula for chlorophyll can be written as $C_{55}H_{72}MgN_4O_6$. The porphyrin ring in chlorophyll binds the magnesium ion at its center. This arrangement is responsible for the green color and the light-absorbing properties of chlorophyll. 4. Conclusion Magnesium is present in chlorophyll, making chlorophyll the correct answer among the given options.

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