Mineral Nutrition
Which element is a component of chlorophyll and thus essential for photosynthesis?
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About This Question
- Subject
- biology
- Chapter
- plant physiology
- Topic
- mineral nutrition
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Magnesium
- Chlorophyll Structure: The chlorophyll molecule consists of a porphyrin 'head' and a phytol 'tail'.
- Central Atom: A single atom of Magnesium (Mg2+) is located at the center of the porphyrin ring.
- Function: Magnesium is essential for the stabilization of the ring structure and is crucial for the absorption of light energy.
- Deficiency: Lack of magnesium leads to interveinal chlorosis (yellowing of leaves), especially in older leaves, as the plant cannot synthesize enough chlorophyll.
This easy difficulty biology question is from the chapter plant physiology, covering the topic of mineral nutrition. It appeared in the 2025 exam.
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