Ionic form and functions of manganese and zinc.
GeneralClass 12AllAnswered 27 Mar 2026
Answer
(i) Manganese (Mn):
Ionic Form:Mn²⁺ (manganous ion)
Functions:
- Enzyme activation: Activates enzymes in photosynthesis, respiration, and nitrogen metabolism.
- Photolysis of water: Plays a major role in splitting water molecules to liberate O₂ during the light reactions of photosynthesis.
(ii) Zinc (Zn):
Ionic Form:Zn²⁺ (zinc ion)
Functions:
- Enzyme activation: Activates carboxylases and other enzymes essential for numerous metabolic processes.
- Auxin biosynthesis: Required for synthesis of auxin (indole-3-acetic acid), a key plant growth hormone.
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