Question

In plants, ammonia is used to synthesise amino acids by

• A. reductive amination
• B. transamination
• C. ammonification
• D. ammonia fixation

Answer 1

Answer: (A), (B)

The correct options are
A reductive amination
B transamination

In plants, ammonia is used as a precursor to synthesise amino acids. It can happen in two ways

• Reductive amination: In this, ammonia reacts with $\alpha$-ketoglutarie acid and forms glutamic acid in the presence of glutamate dehydrogenase.
• Transamination: It involves the transfer of amino group from an amino acid into keto group of a keto acid in the presence of transaminase enzyme.