Question

Which of the following elements is present in the centre of the porphyrin ring of chlorophyll?

• A. Iron
• B. Manganese
• C. Copper
• D. Magnesium

Hint:

Iron in chlorophyll plays a critical role in light absorption during photosynthesis, enabling plants to convert sunlight into energy.

Answer 1

The Correct Option is A

Step 1: Understand the structure of chlorophyll.
Chlorophyll is the pigment responsible for the green color in plants and is crucial for photosynthesis. It contains a porphyrin ring with a central metal ion that plays a key role in its function.
Step 2: Review the options.
- Iron is the metal ion found at the center of the porphyrin ring in chlorophyll, which allows chlorophyll to capture light energy.
- Manganese is important in photosynthesis, but not at the center of the chlorophyll molecule.
- Copper is not present at the center of chlorophyll, though it is essential for other enzymatic functions.
- Magnesium is not at the center of chlorophyll's porphyrin ring but is instead a key element in other biological processes.
Step 3: Conclude.
Iron is present at the center of the porphyrin ring in chlorophyll, making option (A) the correct answer.
Final Answer: \[ \boxed{\text{Iron}} \]