Question 1

Consider the following representation of an enzyme-catalyzed reaction.  
-The reactants, water and lactose, are represented in the image by __________________ and _________________.

Accepted Answer

C, D
D, C

Question 2

Consider the structure shown below.   Fill in the blanks with an integer (1, 2, 3, 4, 5....) as shown in the diagram or to represent a specified number.
-The free carboxylate group is represented by the number _____________________.

Accepted Answer

2

Question 3

Both isoleucine and alanine can be synthesized from other nutrients.

Accepted Answer

A) True 
 B)False  False

Question 4

Which of the following levels of protein structure can involve covalent bond formation?

Accepted Answer

A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  primary and tertiary
F) primary, tertiary and quaternary 
A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  primary and tertiary
F) primary, tertiary and quaternary

Question 5

The following represents the results of an experiment on a metabolic enzyme.   What is the optimum pH of this enzyme?

Accepted Answer

A)  3.0 
B)  5.5 
C)  6.5 
D)  9.5 
A)  3.0 
B)  5.5 
C)  6.5 
D)  9.5

Question 6

Lysine is a weak acid under physiological conditions but it is classified as a basic amino acid. Briefly explain.

Accepted Answer

Lysine contains a basic side c

Question 7

Consider a protein at 25 °C which is heated to 48 °C then cooled back to 25 °C. The following shows schematically the protein structure at these three temperatures, respectively.       25 °C   48 °C   25 °C
Based on this information, the enzyme activity will return at the final temperature (25 °C).

Accepted Answer

A) True 
 B)False

Question 8

This image could represent the reaction in which lactase catalyzes the hydrolysis of lactose (a disaccharide) into glucose and galactose (two monosaccharides). Fill in the blanks with the appropriate letter (A, B, C, D,....) from the image.
-The enzyme-substrate complex is represented by __________________.

Accepted Answer

The answer of This image could represent the reaction in...

Question 9

Albumin is a protein found in blood.

Accepted Answer

A) True 
 B)False

Question 10

The secondary structure of proteins is stabilized by covalent bonds.

Accepted Answer

A) True 
 B)False

Question 11

The reaction in the breakdown of amino acids that involves the removal of nitrogen is

Accepted Answer

A)  oxidative decarboxylation. 
B)  transamination. 
C)  oxidative deamination. 
D)  nitrogen fixation 
A)  oxidative decarboxylation. 
B)  transamination. 
C)  oxidative deamination. 
D)  nitrogen fixation

Question 12

Nonessential amino acids are those which can be synthesized by the body.

Accepted Answer

A) True 
 B)False

Question 13

The addition of a 0.10 M solution of Mg(NO3)2 would most likely affect which type of interaction in the tertiary structure of a protein?

Accepted Answer

A)  hydrogen bonding 
B)  hydrophobic interactions 
C)  hydrophilic interactions 
D)  ion-ion attractions 
A)  hydrogen bonding 
B)  hydrophobic interactions 
C)  hydrophilic interactions 
D)  ion-ion attractions

Question 14

This image could represent the reaction in which lactase catalyzes the hydrolysis of lactose (a disaccharide) into glucose and galactose (two monosaccharides). Fill in the blanks with the appropriate letter (A, B, C, D,....) from the image.
-The active site of the enzyme is represented by ___________________.

Accepted Answer

The answer of This image could represent the reaction in...

Question 15

Protein denaturation results in a disruption of the

Accepted Answer

A)  primary structure. 
B)  secondary and tertiary structure. 
C)  primary and secondary structure. 
D)  primary, secondary and tertiary structure. 
A)  primary structure. 
B)  secondary and tertiary structure. 
C)  primary and secondary structure. 
D)  primary, secondary and tertiary structure.

Question 16

Consider the amino acid sequence given below. Gly-Ala-Thr-Cys Ala would be considered

Accepted Answer

A)  neither C-terminal or N-terminal. 
B)  C-terminal. 
C)  N-terminal. 
A)  neither C-terminal or N-terminal. 
B)  C-terminal. 
C)  N-terminal.

Question 17

The amino acid shown below maybe associated with ALS (Lou Gehrig's disease) and Parkinson's disease.   Which of the following is the zwitterion ion form of the uncommon amino acid?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 18

The following represents the nitrogen cycle. Which of the choices correctly pairs the lettered reactions with the type of organism?

Accepted Answer

A)  A - bacteria B - animals
C - plants 
B)  A - plants B - animals
C - bacteria 
C)  A - plants B - bacteria
C - animals 
D)  A - animals B - bacteria
C - plants 
A)  A - bacteria B - animals
C - plants 
B)  A - plants B - animals
C - bacteria 
C)  A - plants B - bacteria
C - animals 
D)  A - animals B - bacteria
C - plants

Question 19

When the term "essential" is applied to a substance, this means that it cannot be synthesized by an organism and must be obtained from dietary sources.

Accepted Answer

A) True 
 B)False

Question 20

Consider the two "peptides" shown below. Ala-Gly-Phe-Phe-Ala-Gly-Val
Val-Leu-Iso-Ala-Gly-Val-Phe
The side chains of these two "peptides" could form hydrophilic interactions with one another.

Accepted Answer

A) True 
 B)False

Consider the following representation of an enzyme-catalyzed reaction. -The reactants, water and lactose, are represented in the image by __ and _.

Consider the structure shown below. Fill in the blanks with an integer (1, 2, 3, 4, 5....) as shown in the diagram or to represent a specified number. -The free carboxylate group is represented by the number _____________________.

Both isoleucine and alanine can be synthesized from other nutrients.

Which of the following levels of protein structure can involve covalent bond formation?

The following represents the results of an experiment on a metabolic enzyme. What is the optimum pH of this enzyme?

Lysine is a weak acid under physiological conditions but it is classified as a basic amino acid. Briefly explain.

Consider a protein at 25 °C which is heated to 48 °C then cooled back to 25 °C. The following shows schematically the protein structure at these three temperatures, respectively. 25 °C 48 °C 25 °C Based on this information, the enzyme activity will return at the final temperature (25 °C).

Albumin is a protein found in blood.

The secondary structure of proteins is stabilized by covalent bonds.

The reaction in the breakdown of amino acids that involves the removal of nitrogen is

Nonessential amino acids are those which can be synthesized by the body.

The addition of a 0.10 M solution of Mg(NO₃)₂ would most likely affect which type of interaction in the tertiary structure of a protein?

Protein denaturation results in a disruption of the

Consider the amino acid sequence given below. Gly-Ala-Thr-Cys Ala would be considered

The amino acid shown below maybe associated with ALS (Lou Gehrig's disease) and Parkinson's disease. Which of the following is the zwitterion ion form of the uncommon amino acid?

The following represents the nitrogen cycle. Which of the choices correctly pairs the lettered reactions with the type of organism?

When the term "essential" is applied to a substance, this means that it cannot be synthesized by an organism and must be obtained from dietary sources.

Consider the two "peptides" shown below. Ala-Gly-Phe-Phe-Ala-Gly-Val Val-Leu-Iso-Ala-Gly-Val-Phe The side chains of these two "peptides" could form hydrophilic interactions with one another.

Measurements in Science and Medicine

Atoms, Elements, and Compounds

Chemical Bonds

Energy and Physical Properties

Solution Concentration

Chemical Reactions

Acids and Bases

Nuclear Chemistry

Hydrocarbons: an Introduction to Organic Molecules

Hydration, Dehydration, and Alcohols

Carbonyl Compounds and Redox Reactions

Organic Acids and Bases

Condensation and Hydrolysis Reactions

Carbohydrates

Lipids and Membranes

Nucleic Acids, Protein Synthesis, and Heredity

Filters

Exam 14: Proteins

Consider the following representation of an enzyme-catalyzed reaction. -The reactants, water and lactose, are represented in the image by __________________ and _________________.

Consider the structure shown below. Fill in the blanks with an integer (1, 2, 3, 4, 5....) as shown in the diagram or to represent a specified number. -The free carboxylate group is represented by the number _____________________.

Both isoleucine and alanine can be synthesized from other nutrients.

Which of the following levels of protein structure can involve covalent bond formation?

The following represents the results of an experiment on a metabolic enzyme. What is the optimum pH of this enzyme?

Lysine is a weak acid under physiological conditions but it is classified as a basic amino acid. Briefly explain.

Consider a protein at 25 °C which is heated to 48 °C then cooled back to 25 °C. The following shows schematically the protein structure at these three temperatures, respectively. 25 °C 48 °C 25 °C Based on this information, the enzyme activity will return at the final temperature (25 °C).

Albumin is a protein found in blood.

The secondary structure of proteins is stabilized by covalent bonds.

The reaction in the breakdown of amino acids that involves the removal of nitrogen is

Nonessential amino acids are those which can be synthesized by the body.

The addition of a 0.10 M solution of Mg(NO3)2 would most likely affect which type of interaction in the tertiary structure of a protein?

Protein denaturation results in a disruption of the

Consider the amino acid sequence given below. Gly-Ala-Thr-Cys Ala would be considered

The amino acid shown below maybe associated with ALS (Lou Gehrig's disease) and Parkinson's disease. Which of the following is the zwitterion ion form of the uncommon amino acid?

The following represents the nitrogen cycle. Which of the choices correctly pairs the lettered reactions with the type of organism?

When the term "essential" is applied to a substance, this means that it cannot be synthesized by an organism and must be obtained from dietary sources.

Consider the two "peptides" shown below. Ala-Gly-Phe-Phe-Ala-Gly-Val Val-Leu-Iso-Ala-Gly-Val-Phe The side chains of these two "peptides" could form hydrophilic interactions with one another.

Measurements in Science and Medicine

Atoms, Elements, and Compounds

Chemical Bonds

Energy and Physical Properties

Solution Concentration

Chemical Reactions

Acids and Bases

Nuclear Chemistry

Hydrocarbons: an Introduction to Organic Molecules

Hydration, Dehydration, and Alcohols

Carbonyl Compounds and Redox Reactions

Organic Acids and Bases

Condensation and Hydrolysis Reactions

Carbohydrates

Lipids and Membranes

Nucleic Acids, Protein Synthesis, and Heredity

Filters

Consider the following representation of an enzyme-catalyzed reaction. -The reactants, water and lactose, are represented in the image by __ and _.

The addition of a 0.10 M solution of Mg(NO₃)₂ would most likely affect which type of interaction in the tertiary structure of a protein?