Question 1

Multiple substrate enzyme reactions are divided into two classes which are called

Accepted Answer

A)  sequential displacement and double displacement. 
B)  double displacement and concerted displacement. 
C)  sequential displacement and concerted displacement. 
D)  sequential displacement and double as well as sequential displacement and concerted displacement are correct. 
E)  None of the answers is correct. 
A)  sequential displacement and double displacement. 
B)  double displacement and concerted displacement. 
C)  sequential displacement and concerted displacement. 
D)  sequential displacement and double as well as sequential displacement and concerted displacement are correct. 
E)  None of the answers is correct.

Question 2

In an enzymatic reaction in a test tube, the reaction will eventually reach equilibrium. Why does this not happen in living organisms?

Accepted Answer

In a cell, the product may be

Question 3

How do the intermediate steps in multisubstrate enzyme mechanisms differ?

Accepted Answer

In a sequential displacement reaction, b

Question 4

What type of enzymes often display sigmoidal plots of activity versus substrate concentration?

Accepted Answer

A)  holoenzymes 
B)  monomeric enzymes 
C)  allosteric enzymes 
D)  Michaelis-Menten enzymes 
E)  isozymes 
A)  holoenzymes 
B)  monomeric enzymes 
C)  allosteric enzymes 
D)  Michaelis-Menten enzymes 
E)  isozymes

Question 5

Organic cofactors are referred to as __________________.

Accepted Answer

The answer of Organic cofactors are referred to as __________________....

Question 6

A tightly bound cofactor for an enzyme is often called a(n) _____.

Accepted Answer

A)  prosthetic group 
B)  coenzyme 
C)  allosteric activator 
D)  inorganic cofactor 
E)  None of the answers is correct. 
A)  prosthetic group 
B)  coenzyme 
C)  allosteric activator 
D)  inorganic cofactor 
E)  None of the answers is correct.

Question 7

The Gibbs-free energy of activation is the difference between the

Accepted Answer

A)  substrate and the transition state. 
B)  substrate and the product. 
C)  product and the transition state. 
D)  All of the answers are correct. 
E)  None of the answers is correct. 
A)  substrate and the transition state. 
B)  substrate and the product. 
C)  product and the transition state. 
D)  All of the answers are correct. 
E)  None of the answers is correct.

Question 8

What does Vmax indicate?

Accepted Answer

The maximum velocity or rate o

Question 9

Allosteric enzymes can be identified because the plot of initial velocity, V0, versus substrate concentration, S, is not hyperbolic but __________________ -shaped.

Accepted Answer

Question 10

What is the Michaelis-Menten equation? Define all parameters.

Accepted Answer

V₀ = V_max([S]/([S] + K_M)) Initial v

Exam 8: Enzymes: Basic Concepts and Kinetics

Multiple substrate enzyme reactions are divided into two classes which are called

In an enzymatic reaction in a test tube, the reaction will eventually reach equilibrium. Why does this not happen in living organisms?

How do the intermediate steps in multisubstrate enzyme mechanisms differ?

What type of enzymes often display sigmoidal plots of activity versus substrate concentration?

Organic cofactors are referred to as __________________.

A tightly bound cofactor for an enzyme is often called a(n) _____.

The Gibbs-free energy of activation is the difference between the

What does Vmax indicate?

Allosteric enzymes can be identified because the plot of initial velocity, V0, versus substrate concentration, S, is not hyperbolic but __________________ -shaped.

What is the Michaelis-Menten equation? Define all parameters.

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

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

The Biosynthesis of Amino Acids

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

What does V_max indicate?

Allosteric enzymes can be identified because the plot of initial velocity, V₀, versus substrate concentration, S, is not hyperbolic but __________________ -shaped.