Element located in centre of porphyrin ring of chlorophyll is

Options

A. Calcium
B. Magnesium
C. Potassium
D. Manganese

Answer

To solve the question regarding the element located in the center of the porphyrin ring of chlorophyll, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Chlorophyll**:
- Chlorophyll is a complex molecule essential for photosynthesis in plants. It contains a porphyrin ring, which is a cyclic structure made up of four pyrrole subunits.

2. **Identify the Central Atom**:
- In the porphyrin ring of chlorophyll, there is a specific atom located at the center of this ring. This atom plays a crucial role in the molecule's ability to absorb light.

3. **Consider the Given Options**:
- The options provided are calcium, magnesium, potassium, and manganese. We need to determine which of these elements is found at the center of the porphyrin ring.

4. **Recall the Function of the Central Atom**:
- The central atom in the porphyrin ring is responsible for coordinating with the nitrogen atoms of the pyrrole groups, which is vital for the molecule's function in photosynthesis.

5. **Identify the Correct Element**:
- The correct element that is located at the center of the porphyrin ring of chlorophyll is **magnesium (Mg)**. This is a well-known fact in biochemistry and plant physiology.

6. **Conclude the Answer**:
- Therefore, the answer to the question is **magnesium**.

### Final Answer:
The element located in the center of the porphyrin ring of chlorophyll is **magnesium (Mg)**.