(i) Identify A and B in the equation. (ii) What is its significance? Equation: α-Ketoglutaric acid + [A] + NADPH → [B] + H₂O + NADP⁺
GeneralClass 12AllAnswered 27 Mar 2026
Answer
(i) Identification:
- [A] = NH₄⁺ (ammonium ion)
- [B] = Glutamate (glutamic acid)
(ii) Significance:
This equation represents reductive amination—a pathway of ammonia assimilation where an ammonium ion is directly incorporated into an organic acid (α-ketoglutarate) to form an amino acid (glutamate). This is catalyzed by glutamate dehydrogenase and represents a primary route for nitrogen assimilation in plants.
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