Which of the following statements concerning amino acid biosynthesis is incorrect?
A) Glutamate is one of the three amino acids produced by transamination of the appropriate alpha-keto acid.
B) The essential amino acids require seven to ten steps for biosynthesis in microorganisms.
C) All but six of the standard amino acids can be biosynthesized in the human body.
D) The nonessential amino acid tyrosine is obtained from the essential amino acid phenylalanine.
Correct Answer:
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