Question 1

How much faster is a reaction with the fastest enzyme than without a catalyst?

Accepted Answer

A)  About 10 times faster. 
B)  About 100 times faster. 
C)  About 1,000 times faster. 
D)  About 10,000 times faster. 
E)  About 1020 times faster. 
A)  About 10 times faster. 
B)  About 100 times faster. 
C)  About 1,000 times faster. 
D)  About 10,000 times faster. 
E)  About 1020 times faster.

Question 2

The Michaelis constant is

Accepted Answer

A)  the rate constant for the formation of the substrate-enzyme (E-S) complex. 
B)  the rate constant for the breakdown of the substrate-enzyme (E-S) complex to form free enzyme and substrate. 
C)  the rate constant for the breakdown of the substrate-enzyme (E-S) complex to form free enzyme and product. 
D)  a compilation of several rate constants for the reaction. 
A)  the rate constant for the formation of the substrate-enzyme (E-S) complex. 
B)  the rate constant for the breakdown of the substrate-enzyme (E-S) complex to form free enzyme and substrate. 
C)  the rate constant for the breakdown of the substrate-enzyme (E-S) complex to form free enzyme and product. 
D)  a compilation of several rate constants for the reaction.

Question 3

Which of the following are related for a given enzyme?

Accepted Answer

A)  Vmax, KM, and percentage of α -helix 
B)  Vmax, kcat, and percentage of β -sheet 
C)  Vmax, kcat, and turnover number 
D)  Vmax, KM, and molecular weight 
E)  None of these are related in any way 
A)  Vmax, KM, and percentage of α -helix 
B)  Vmax, kcat, and percentage of β -sheet 
C)  Vmax, kcat, and turnover number 
D)  Vmax, KM, and molecular weight 
E)  None of these are related in any way

Question 4

The kinetic order of a reaction

Accepted Answer

A)  can be determined by inspection from the coefficients of the balanced equation 
B)  must be determined experimentally 
C)  always depends on the concentration of enzyme 
D)  never depends on concentrations of reactants 
A)  can be determined by inspection from the coefficients of the balanced equation 
B)  must be determined experimentally 
C)  always depends on the concentration of enzyme 
D)  never depends on concentrations of reactants

Question 5

It is important that at physiological conditions, enzymes work at Vmax.

Accepted Answer

A) True 
 B)False

Question 6

The rate of a reaction is always dependent on the concentration(s) of the reactant(s).

Accepted Answer

A) True 
 B)False

Question 7

Most enzyme reactions display first order kinetics for the individual substrates when the substrate concentration is low.

Accepted Answer

A) True 
 B)False

Question 8

All catalysts work by lowering the activation energy for a reaction.

Accepted Answer

A) True 
 B)False

How much faster is a reaction with the fastest enzyme than without a catalyst?

The Michaelis constant is

Which of the following are related for a given enzyme?

The kinetic order of a reaction

It is important that at physiological conditions, enzymes work at V_max.

The rate of a reaction is always dependent on the concentration(s) of the reactant(s).

Most enzyme reactions display first order kinetics for the individual substrates when the substrate concentration is low.

All catalysts work by lowering the activation energy for a reaction.

Biochemistry and the Organization of Cells

Water the Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins Enzymes Mechanisms and Control

Lipids and Proteins Are Associated in Biological Membranes

Nucleic Acids How Structure Conveys Information

Biosynthesis of Nucleic Acids Replication

Transcription of the Genetic Code the Biosynthesis of Rna

Protein Synthesis Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses Cancer and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Carbohydrates

Glycolysis

Storage Mechanisms and Control in Carbohydrate Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Lipid Metabolism

Photosynthesis

The Metabolism of Nitrogen

Integration of Metabolism Cellular Signaling

Filters

Exam 6: The Behavior of Proteins Enzymes

How much faster is a reaction with the fastest enzyme than without a catalyst?

The Michaelis constant is

Which of the following are related for a given enzyme?

The kinetic order of a reaction

It is important that at physiological conditions, enzymes work at Vmax.

The rate of a reaction is always dependent on the concentration(s) of the reactant(s).

Most enzyme reactions display first order kinetics for the individual substrates when the substrate concentration is low.

All catalysts work by lowering the activation energy for a reaction.

Biochemistry and the Organization of Cells

Water the Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins Enzymes Mechanisms and Control

Lipids and Proteins Are Associated in Biological Membranes

Nucleic Acids How Structure Conveys Information

Biosynthesis of Nucleic Acids Replication

Transcription of the Genetic Code the Biosynthesis of Rna

Protein Synthesis Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses Cancer and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Carbohydrates

Glycolysis

Storage Mechanisms and Control in Carbohydrate Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Lipid Metabolism

Photosynthesis

The Metabolism of Nitrogen

Integration of Metabolism Cellular Signaling

Filters

It is important that at physiological conditions, enzymes work at V_max.