Question

Mg is an important component of which biomolecule occurring extensively in living world?

• A. Haemoglobin
• B. Chlorophyll
• C. Florigen
• D. ATP

Hint:

Chlorophyll has Mg at its centre, while haemoglobin has Fe at its centre.

Answer 1

The Correct Option is B

Step 1: Role of magnesium in biology.
Magnesium is the central metal ion in the porphyrin-like ring structure of chlorophyll.
Step 2: Compare with haemoglobin.
Haemoglobin contains iron (Fe) as central metal, not Mg.
Step 3: Therefore correct biomolecule.
Chlorophyll is present in plants and is essential for photosynthesis.
Final Answer: \[ \boxed{\text{Chlorophyll}} \]