Nitrogen cycle in nature · NCERT Biology

In 'Reductive Amination', ammonia reacts with which organic acid to form Glutamic acid?

  1. Oxaloacetic acid (C₄ acid)
  2. Citric acid (C₆ acid)
  3. alpha-ketoglutaric acid
  4. Pyruvic acid (C₃ acid)
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Correct answer: alpha-ketoglutaric acid

In reductive amination, ammonia reacts with α-ketoglutaric acid in the presence of NADPH and glutamate dehydrogenase to form glutamic acid. This is a primary way plants assimilate inorganic nitrogen.

Difficulty: Medium Question 17 of 20

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