Question 1

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 synthase 
A) nitrate reductase 
B) nitrogenase 
C) glutamate dehydrogenase 
D) glutamate synthase

Question 2

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:PIID 
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:PIID

Question 3

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 synthetase 
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 synthetase

Question 4

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 base 
A) an a-keto acid 
B) an acetyl-CoA derivative 
C) a phospho-carbon skeleton 
D) a nitrogenous base

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-phosphate 
A) γ-glutamyl-phosphate 
B) α-ketoglutarate 
C) N-acetylglutamate 
D) glutamine-5-phosphate

Question 6

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-CoA 
A) biotin and ATP 
B) acetyl-CoA 
C) methylmalonyl-CoA 
D) propionyl-CoA

Question 7

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

Accepted Answer

A) glutamate 
B) a-ketoglutarate 
C) NADPH 
D) N-acetylglutamate 
A) glutamate 
B) a-ketoglutarate 
C) NADPH 
D) N-acetylglutamate

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

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

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

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

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

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

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

The Facts of Life: Chemistry Is the Logic of Biological Phenomena

Water: the Medium of Life

Thermodynamics of Biological Systems

Amino Acids

Proteins: Their Primary Structure and Biological Functions

Proteins: Secondary, tertiary, and Quaternary Structure

Carbohydrates and the Glycoconjugates of Cell Surfaces

Lipids

Lipid Biosynthesis

Membranes and Membrane Transport

The Reception and Transmission of Extracellular Information

Enzymes Kinetics and Specificity

Mechanisms of Enzyme Action

Enzyme Regulation

Molecular Motors

Nutrition and the Organization of Metabolism

Glycolysis

The Tricarboxylic Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

Gluconeogenesis, glycogen Metabolism, and the Pentose Phosphate Pathway

Fatty Acid Catabolism

Nucleotides and Nucleic Acids

Structure of Nucleic Acids

Synthesis and Degradation of Nucleotides

Recombinant Dna: Cloning and Creation of Chimeric Genes

DNA Metabolism: Replication, recombination, and Repair

Transcription and the Regulation of Gene Expression

Protein Synthesis

Post-Transcriptional Regulation of Gene Expression

Completing the Protein Life Cycle: Folding, processing, and Degradation

Metabolic Integration and Organ Specialization

Filters

Exam 23: Nitrogen Acquisition and Amino Acid Metabolism

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

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

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

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

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

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

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

The Facts of Life: Chemistry Is the Logic of Biological Phenomena

Water: the Medium of Life

Thermodynamics of Biological Systems

Amino Acids

Proteins: Their Primary Structure and Biological Functions

Proteins: Secondary, tertiary, and Quaternary Structure

Carbohydrates and the Glycoconjugates of Cell Surfaces

Lipids

Lipid Biosynthesis

Membranes and Membrane Transport

The Reception and Transmission of Extracellular Information

Enzymes Kinetics and Specificity

Mechanisms of Enzyme Action

Enzyme Regulation

Molecular Motors

Nutrition and the Organization of Metabolism

Glycolysis

The Tricarboxylic Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

Gluconeogenesis, glycogen Metabolism, and the Pentose Phosphate Pathway

Fatty Acid Catabolism

Nucleotides and Nucleic Acids

Structure of Nucleic Acids

Synthesis and Degradation of Nucleotides

Recombinant Dna: Cloning and Creation of Chimeric Genes

DNA Metabolism: Replication, recombination, and Repair

Transcription and the Regulation of Gene Expression

Protein Synthesis

Post-Transcriptional Regulation of Gene Expression

Completing the Protein Life Cycle: Folding, processing, and Degradation

Metabolic Integration and Organ Specialization

Filters