Q. Ammonia or ammonium is oxidized to nitrite followed by the oxidation of nitrite to nitrate is called as

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Q. Nitrate is reduced and ultimately produces N₂ through a series of intermediate gaseous nitrogen oxide products is called as

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Q. 3-phosphoglycerate is not the metabolic precursor for

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Q. Pyruvate is the precursor for

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Q. The cyclized derivative of glutamate is

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Q. Precursor of glycine is

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Q. Which of the following is a non-essential amino acid?

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Q. Which of the following gives rise to methionine, threonine and lysine?

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Q. Which of the following gives rise to valine and isoleucine?

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Q. Which of the following is not an aromatic amino acid?

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Q. Which of the following can be formed by hydroxylation of phenylalanine?

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Q. Phosphoribosyl pyrophosphate is a precursor of tryptophan and

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Q. Tyrosine gives rise to a family of catecholamines that does not include

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Q. Which of the following gives rise to γ-amino butyrate?

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Q. Which of the following is the precursor for nitric oxide?

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Q. Which of the following is an important cellular reducing agent?

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Q. Which of the following is a PLP-requiring enzyme?

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Q. Which of the following is derived from tryptophan?

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Q. Cimetidine is a structural analog of

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Q. Lignin is derived from

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