________________ is a special constituent of chlorophyll without which photosynthesis is not possible ?
Correct answer: B. Nitrogen
- A. Calcium
- B. Nitrogen
- C. Phosphorous
- D. Hydrogen
Explanation
Nitrogen is present in chlorophyll's porphyrin ring and is essential for chlorophyll formation and photosynthesis. Calcium and phosphorus are important plant nutrients, but they are not the defining nitrogen-containing constituent of chlorophyll.
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