Magnesium in chlorophyll molecule is located in

Options

A. Centre of porphyrin head
B. Corner of porphyrin head
C. Phytol tail
D. None of the above.

Answer

**Step-by-Step Solution:**

1. **Understanding Chlorophyll Structure**: Chlorophyll is the primary pigment involved in photosynthesis. It has a unique structure that can be compared to a tadpole, consisting of a head (porphyrin) and a tail (phytol).

2. **Identifying the Components of Porphyrin**: The porphyrin head is composed of four pyrrole rings, which are linked together. Each pyrrole ring contains five atoms: four carbon atoms and one nitrogen atom.

3. **Locating Magnesium in Chlorophyll**: Within the chlorophyll molecule, magnesium ions are an essential component. The magnesium ion is specifically located at the center of the porphyrin head.

4. **Surrounding Atoms**: The magnesium ion is coordinated by four nitrogen atoms from the pyrrole rings of the porphyrin. These nitrogen atoms bind to the magnesium, stabilizing its position within the chlorophyll structure.

5. **Conclusion**: Based on the structure and the location of magnesium in chlorophyll, the correct answer to the question is that magnesium is located in the center of the porphyrin head.

**Final Answer**: Magnesium in the chlorophyll molecule is located in the center of the porphyrin head.

---