Question 1

Which of the following outcomes would be a result of a high [Gln]/[α-KG] ratio?

Accepted Answer

A)  a need for ammonium fixation by glutamine synthetase
B)  an increase in activity of glutamine synthetase
C)  an increase in the degree of adenylation of glutamine synthetase
D)  inhibition of AT:PIIA and stimulation of AT:PIIDE) A) and B)
F) None of the above

Question 2

Which of the following enzymes catalyzes the reaction below?
N₂ + 10 H⁺+ 8 e⁻ → 2 NH₄⁺ + H₂

Accepted Answer

A)  nitrate reductase
B)  nitrogenase
C)  glutamate dehydrogenase
D)  glutamate synthaseE) C) and D)
F) All of the above

Question 3

Which of the following molecules is synthesized and then transaminated using glutamate,for subsequent use in amino acid biosynthesis in plants and microorganisms?

Accepted Answer

A)  an a-keto acid
B)  an acetyl-CoA derivative
C)  a phospho-carbon skeleton
D)  a nitrogenous baseE) All of the above
F) B) and C)

Question 4

Which of the following products is formed from the glutamate synthase-catalyzed reaction?

Accepted Answer

A)  glutamate
B)  a-ketoglutarate
C)  NADPH
D)  N-acetylglutamateE) A) and D)
F) All of the above

Question 5

Which of the following compounds is an intermediate in biosynthesis of ornithine and a regulator of carbamoyl-phosphate synthetase-I?

Accepted Answer

A)  γ-glutamyl-phosphate
B)  α-ketoglutarate
C)  N-acetylglutamate
D)  glutamine-5-phosphateE) A) and B)
F) All of the above

Question 6

Which of the following reactions is catalyzed by glutamate dehydrogenase catalyze?

Accepted Answer

A)  the reductive amination of a-ketoglutarate to yield glutamate
B)  phosphorylation of carbamate to yield carbamoyl phosphate
C)  the amidation of the g-carboxyl group of glutamate to form glutamine
D)  the deadenylation of glutamine synthetaseE) All of the above
F) A) and D)

Question 7

Which of the following is NOT a part of the degradation pathway of valine,isoleucine,and methionine leading to succinyl-CoA?

Accepted Answer

A)  biotin and ATP
B)  acetyl-CoA
C)  methylmalonyl-CoA
D)  propionyl-CoAE) All of the above
F) None of the above

Exam 23: Nitrogen Acquisition and Amino Acid Metabolism

Which of the following reactions is catalyzed by glutamate dehydrogenase catalyze?

Correct Answer
verified

Which of the following compounds is an intermediate in biosynthesis of ornithine and a regulator of carbamoyl-phosphate synthetase-I?

Correct Answer
verified

Which of the following is NOT a part of the degradation pathway of valine,isoleucine,and methionine leading to succinyl-CoA?

Correct Answer
verified

Which of the following enzymes catalyzes the reaction below? N₂ + 10 H⁺+ 8 e⁻ → 2 NH₄⁺ + H₂

Correct Answer
verified

Which of the following molecules is synthesized and then transaminated using glutamate,for subsequent use in amino acid biosynthesis in plants and microorganisms?

Correct Answer
verified

Which of the following products is formed from the glutamate synthase-catalyzed reaction?

Correct Answer
verified

Which of the following outcomes would be a result of a high [Gln]/[α-KG] ratio?

Correct Answer
verified

Exam 23: Nitrogen Acquisition and Amino Acid Metabolism

Which of the following reactions is catalyzed by glutamate dehydrogenase catalyze?

Correct AnswerverifiedShow Answer

Which of the following compounds is an intermediate in biosynthesis of ornithine and a regulator of carbamoyl-phosphate synthetase-I?

Correct AnswerverifiedShow Answer

Which of the following is NOT a part of the degradation pathway of valine,isoleucine,and methionine leading to succinyl-CoA?

Correct AnswerverifiedShow Answer

Which of the following enzymes catalyzes the reaction below? N₂ + 10 H⁺+ 8 e⁻ → 2 NH₄⁺ + H₂

Correct AnswerverifiedShow Answer

Which of the following molecules is synthesized and then transaminated using glutamate,for subsequent use in amino acid biosynthesis in plants and microorganisms?

Correct AnswerverifiedShow Answer

Which of the following products is formed from the glutamate synthase-catalyzed reaction?

Correct AnswerverifiedShow Answer

Which of the following outcomes would be a result of a high [Gln]/[α-KG] ratio?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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