Question 1

What is the reason for performing an enzyme assay?

Accepted Answer

A) to determine the number of enzyme molecules per liter 
B) to determine the number of enzyme molecules per mL 
C) to determine the activity of an enzyme 
D) to determine the number of enzymes present 
A) to determine the number of enzyme molecules per liter 
B) to determine the number of enzyme molecules per mL 
C) to determine the activity of an enzyme 
D) to determine the number of enzymes present

Question 2

The enzyme model that accounts for molecule flexibility is

Accepted Answer

A) lock and key. 
B) induced fit. 
C) allosteric effects. 
D) More than one answer is correct. 
A) lock and key. 
B) induced fit. 
C) allosteric effects. 
D) More than one answer is correct.

Question 3

Which statement about enzymes is incorrect?

Accepted Answer

A) Enzymes can either speed up or slow down a chemical reaction. 
B) Enzymes are not used up during the reaction in which they are involved. 
C) Enzymes are proteins that are capable of reducing the activation energy. 
D) There are enzymes that interact with one enantiomer,but not the other. 
A) Enzymes can either speed up or slow down a chemical reaction. 
B) Enzymes are not used up during the reaction in which they are involved. 
C) Enzymes are proteins that are capable of reducing the activation energy. 
D) There are enzymes that interact with one enantiomer,but not the other.

Question 4

Which of the following is a (are)zymogen(s)?

Accepted Answer

A) pepsin 
B) chymotrypsinogen 
C) carboxypeptidase 
D) all are zymogens 
A) pepsin 
B) chymotrypsinogen 
C) carboxypeptidase 
D) all are zymogens

Question 5

An enzyme useful in diagnosing leukemia is _____ .

Accepted Answer

A) CK 
B) acid phosphatase 
C) lysozyme 
D) LDH 
A) CK 
B) acid phosphatase 
C) lysozyme 
D) LDH

Question 6

In an enzyme assay,4.5 $\mu$mol of substrate was consumed in 3.166 min.What is the enzyme activity expressed in IU?

Accepted Answer

A) 4.5 IU 
B) 14 IU 
C) 0.70 IU 
D) 1.4 IU 
A) 4.5 IU 
B) 14 IU 
C) 0.70 IU 
D) 1.4 IU

Question 7

Isoenzymes vary from each other because they contain different isotopes of elements like carbon,nitrogen,oxygen and sulfur.

Accepted Answer

A) True 
 B)False

Question 8

Substances that can bind to an enzyme and increase its activity are called

Accepted Answer

A) positive modulators. 
B) negative modulators. 
C) allosteric regulators. 
D) positive regulators. 
A) positive modulators. 
B) negative modulators. 
C) allosteric regulators. 
D) positive regulators.

What is the reason for performing an enzyme assay?

The enzyme model that accounts for molecule flexibility is

Which statement about enzymes is incorrect?

Which of the following is a (are)zymogen(s)?

An enzyme useful in diagnosing leukemia is _____ .

In an enzyme assay,4.5 $\mu$ mol of substrate was consumed in 3.166 min.What is the enzyme activity expressed in IU?

Isoenzymes vary from each other because they contain different isotopes of elements like carbon,nitrogen,oxygen and sulfur.

Substances that can bind to an enzyme and increase its activity are called

Matter, measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Reaction Rates and Equilibrium

Acids, bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

Exam 20: Enzymes

What is the reason for performing an enzyme assay?

The enzyme model that accounts for molecule flexibility is

Which statement about enzymes is incorrect?

Which of the following is a (are)zymogen(s)?

An enzyme useful in diagnosing leukemia is _____ .

In an enzyme assay,4.5 μ\muμ mol of substrate was consumed in 3.166 min.What is the enzyme activity expressed in IU?

Isoenzymes vary from each other because they contain different isotopes of elements like carbon,nitrogen,oxygen and sulfur.

Substances that can bind to an enzyme and increase its activity are called

Matter, measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Reaction Rates and Equilibrium

Acids, bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

In an enzyme assay,4.5 $\mu$ mol of substrate was consumed in 3.166 min.What is the enzyme activity expressed in IU?