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Question 01
Which metal ion is a constituent of chlorophyll?
(a) Iron         (b) Copper         (c) Magnesium         (d) Zinc


Solution

(c) Magnesium (Mg) is present in the centre of porphyrin ring of the chlorophyll molecule. Other ions, i.e., iron, copper and zinc participate in other metabolic processes which are
Fe is an important part of cytochrome and ferredoxin
Cu plays an important role in enzyme catalysing redox reactions
Zn is associated with auxin (a phytohormone) synthesis.


Biology
NCERT Exemplar
Standard XI

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