AminoAcidBiosynthesisworksheet

AminoAcidBiosynthesisworksheet - Amino Acid Biosynthesis...

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Amino Acid Biosynthesis Student Companion Ch 24 Self Test: Problems 3, 8, 10-18, 20, 21, 23, 24 1) What enzyme is responsible for the fixation of nitrogen? Describe it. 2) How many electrons are required to reduce nitrogen gas to ammonia? How many electrons are required in the biological reduction? 3) What are the ultimate biological molecules that act as acceptors of ammonia? What enzymes mediate this transformation? What are the energetic requirements for these reactions? 4) What nine amino acids cannot be synthesized in humans? 5) Alpha-ketoglutarate provides the carbon skeleton for which amino acids? 6) Two different amidation methods are used to install side chain amides in amino acids. Describe these two methods and match them to the relevant amino acid. 7) Which amino acids derive their carbon skeletons completely from oxaloacetate? 8) Serine is derived from which glucogenic precursor?
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AminoAcidBiosynthesisworksheet - Amino Acid Biosynthesis...

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