This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Non essential amino acid - aspartate is synthesized by which reaction in the body? \nSelect and explain. \nA. Transamination from pyruvate, B. Transamination from oxaloacetate, C. Transamination from α-ketoglutarate, D. Removal of hydroxymethyl group from serine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Nonessential amino acids—can be synthesized in humans.\na. Alanine—transamination from pyruvate.\nb. Aspartate—transamination from oxaloacetate.\nc. Asparagine—addition of ammonia to aspartate.\nd. Cysteine—skeleton from serine and sulfur from methionine.\ne. Glutamate—transamination from α-ketoglutarate.\nf. Glutamine—addition of ammonia to glutamate.', 'role': 'assistant'}]