Which of the following is present in the head of chlorophyll molecules

Options

A. Fe
B. Mg
C. K
D. Mn

Answer

To answer the question "Which of the following is present in the head of chlorophyll molecules?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Chlorophyll Structure**:
- Chlorophyll is a pigment found in plants that is essential for photosynthesis. It has a specific structure that includes a porphyrin ring.

2. **Identifying the Components of Chlorophyll**:
- The chlorophyll molecule consists of a porphyrin ring and a long hydrophobic tail. The porphyrin ring is the head of the chlorophyll molecule.

3. **Recognizing the Key Element in the Head**:
- Within the porphyrin ring, there is a central metal ion that plays a crucial role in the function of chlorophyll.

4. **Determining the Metal Ion**:
- The central metal ion in the chlorophyll molecule is magnesium (Mg). This magnesium ion is essential for the molecule's ability to absorb light and participate in photosynthesis.

5. **Conclusion**:
- Therefore, the correct answer to the question is that magnesium is present in the head of chlorophyll molecules.

### Final Answer:
Magnesium is present in the head of chlorophyll molecules.

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