Question 1

The ATP-binding region of the nitrogen-fixating reductase is a(n) ___________ domain.

Accepted Answer

A)  iron-sulfur 
B)  electron-binding 
C)  P-loop NTPase family 
D)  molybdenum-binding 
E)  All the answers are correct. 
A)  iron-sulfur 
B)  electron-binding 
C)  P-loop NTPase family 
D)  molybdenum-binding 
E)  All the answers are correct.

Question 2

At least _____________ ATP molecules are hydrolyzed for each N2 reduced.

Accepted Answer

Question 3

The peptide glutathione

Accepted Answer

A)  has a glutamate residue linked to glycine through its α-amine. 
B)  plays a role in the synthesis of the purine guanine. 
C)  is required to catalyze the transamination of glutamate from α-ketoglutarate. 
D)  is used to detoxify cells by reacting with organic peroxides. 
E)  functions as a one-carbon transfer molecule. 
A)  has a glutamate residue linked to glycine through its α-amine. 
B)  plays a role in the synthesis of the purine guanine. 
C)  is required to catalyze the transamination of glutamate from α-ketoglutarate. 
D)  is used to detoxify cells by reacting with organic peroxides. 
E)  functions as a one-carbon transfer molecule.

Question 4

Glutamine synthetase adds NH3 to _______________ to make glutamine.

Accepted Answer

Question 5

Chorismate is a precursor to the amino acids

Accepted Answer

A)  tryptophan, tyrosine, and phenylalanine. 
B)  serine, glycine and cysteine. 
C)  isoleucine, leucine and valine. 
D)  methionine, threonine, and lysine. 
E)  None of the answers is correct. 
A)  tryptophan, tyrosine, and phenylalanine. 
B)  serine, glycine and cysteine. 
C)  isoleucine, leucine and valine. 
D)  methionine, threonine, and lysine. 
E)  None of the answers is correct.

Question 6

Tyrosine is a precursor to the molecule(s)

Accepted Answer

A)  melanin. 
B)  epinephrine. 
C)  serotonin. 
D)  melanin and epinephrine 
E)  melanin and serotonin. 
A)  melanin. 
B)  epinephrine. 
C)  serotonin. 
D)  melanin and epinephrine 
E)  melanin and serotonin.

Question 7

How does the herbicide glyphosate work?

Accepted Answer

Glyphosate (Roundup is one brand) acts b

Question 8

Amino acid synthesis is $ \underline { \text {primarily}}$  regulated by

Accepted Answer

A)  turnover. 
B)  diet. 
C)  urea excretion. 
D)  allosteric enzyme regulation. 
E)  All the answers are correct. 
A)  turnover. 
B)  diet. 
C)  urea excretion. 
D)  allosteric enzyme regulation. 
E)  All the answers are correct.

Exam 24: The Biosynthesis of Amino Acids

The ATP-binding region of the nitrogen-fixating reductase is a(n) ___________ domain.

At least _____________ ATP molecules are hydrolyzed for each N2 reduced.

The peptide glutathione

Glutamine synthetase adds NH3 to _______________ to make glutamine.

Chorismate is a precursor to the amino acids

Tyrosine is a precursor to the molecule(s)

How does the herbicide glyphosate work?

Amino acid synthesis is primarily‾ \underline { \text {primarily}}primarily​ regulated by

Biochemistry: an Evolving Science

Protein Composition and Structure

Exploring Proteins and Proteomes

DNA, RNA, and the Flow of Genetic Information

Exploring Genes and Genomes

Exploring Evolution and Bioinformatics

Hemoglobin: a Portrait of a Protein in Action

Enzymes: Basic Concepts and Kinetics

Oxidative Phosphorylation

Catalytic Strategies

Regulatory Strategies

Carbohydrates

Lipids and Cell Membranes

Membrane Channels and Pumps

Signal-Transduction Pathways

Metabolism: Basic Concepts and Design

Glycolysis and Gluconeogenesis

The Citric Acid Cycle

The Light Reactions of Photosynthesis

The Calvin Cycle and the Pentose Phosphate Pathway

Glycogen Metabolism

Fatty Acid Metabolism

Protein Turnover and Amino Acid Catabolism

Nucleotide Biosynthesis

Biosynthesis of Membrane Lipids and Steroids

The Integration of Metabolism

DNA Replication, Repair, and Recombination

Rna Synthesis and Processing

Protein Synthesis

The Control of Gene Expression in Prokaryotes

The Control of Gene Expression in Eukaryotes

Sensory Systems

The Immune System

Molecular Motors

Drug Development

Filters

At least _____________ ATP molecules are hydrolyzed for each N₂ reduced.

Glutamine synthetase adds NH₃ to _______________ to make glutamine.

Amino acid synthesis is $\underline { \text {primarily}}$ regulated by