alleryWhich mineral is needed for **chlorophyll synthesis**?
ACalcium
BMagnesium (central atom of chlorophyll porphyrin ring)
CSulphur
DSodium
Answer & Solution
Correct answer: B. Magnesium (central atom of chlorophyll porphyrin ring)
Mg²⁺ sits at the centre of every chlorophyll molecule's porphyrin ring.
Mg deficiency → chlorosis (yellowing of older leaves).
Mg also activates many enzymes (RuBisCO, ATPases).
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