Question 1

Which of the following is not true concerning standard states?

Accepted Answer

A)  For pure liquids, the standard state is 1M 
B)  For pure solids, the standard state is the pure solid itself 
C)  For gases, the standard state is 1 atmosphere 
D)  For solutes, the standard state is 1M 
A)  For pure liquids, the standard state is 1M 
B)  For pure solids, the standard state is the pure solid itself 
C)  For gases, the standard state is 1 atmosphere 
D)  For solutes, the standard state is 1M

Question 2

Exhibit 15A   Consider the reaction of alcohol dehydrogenase.
Refer to Exhibit 15A.Which is the oxidizing agent?

Accepted Answer

A)  Ethanol 
B)  NAD+ 
C)  Acetaldehyde 
D)  NADH 
E)  H+ 
A)  Ethanol 
B)  NAD+ 
C)  Acetaldehyde 
D)  NADH 
E)  H+

Question 3

The phosphorylation of ADP to produce ATP is endergonic because

Accepted Answer

A)  a negatively charged ion is bonded to a molecule that already carries a negative charge 
B)  ATP is more stable than ADP 
C)  the entropy of the products is less than that of the reactants 
D)  polyphosphate chains are the storage form of phosphorus in living organisms 
A)  a negatively charged ion is bonded to a molecule that already carries a negative charge 
B)  ATP is more stable than ADP 
C)  the entropy of the products is less than that of the reactants 
D)  polyphosphate chains are the storage form of phosphorus in living organisms

Question 4

During reduction

Accepted Answer

A)  electrons are lost. 
B)  electrons are gained. 
C)  electrons may either be lost or gained. 
D)  hydrogen is formed. 
A)  electrons are lost. 
B)  electrons are gained. 
C)  electrons may either be lost or gained. 
D)  hydrogen is formed.

Question 5

In metabolism the term "activation" refers to

Accepted Answer

A)  conversion of a component of a metabolic pathway into a reactive compound. 
B)  addition of a catalyst. 
C)  bypassing endergonic reactions in a pathway. 
D)  bypassing the unreactive components of a pathway. 
A)  conversion of a component of a metabolic pathway into a reactive compound. 
B)  addition of a catalyst. 
C)  bypassing endergonic reactions in a pathway. 
D)  bypassing the unreactive components of a pathway.

Question 6

Which of the following are examples of exergonic processes?

Accepted Answer

A)  protein synthesis and active transport 
B)  protein synthesis and oxidation of carbohydrates 
C)  active transport and oxidation of carbohydrates 
D)  oxidation of fats and of carbohydrates 
A)  protein synthesis and active transport 
B)  protein synthesis and oxidation of carbohydrates 
C)  active transport and oxidation of carbohydrates 
D)  oxidation of fats and of carbohydrates

Question 7

Which of the following statements apply to anabolism?

Accepted Answer

A)  proceeds in stages 
B)  requires energy 
C)  requires reducing agents 
D)  all of these 
A)  proceeds in stages 
B)  requires energy 
C)  requires reducing agents 
D)  all of these

Question 8

The linking of an exergonic reaction to drive an endergonic reaction is called:

Accepted Answer

A)  coupling 
B)  a state function 
C)  resonance 
D)  catabolsim 
A)  coupling 
B)  a state function 
C)  resonance 
D)  catabolsim

Question 9

The standard state usually used in biochemistry (DG°') includes

Accepted Answer

A)  all concentrations at 1 M. 
B)  all concentrations at 1 M, except for [H+], which is 10-7 M. 
C)  same as a), but at 25° C. 
D)  same as b), but at 25° C. 
A)  all concentrations at 1 M. 
B)  all concentrations at 1 M, except for [H+], which is 10-7 M. 
C)  same as a), but at 25° C. 
D)  same as b), but at 25° C.

Question 10

Which of the following is not true?

Accepted Answer

A)  Molecular oxygen is always a substrate in oxidation reactions. 
B)  Oxidation reactions involve the movement of electrons from one molecule to another 
C)  When a molecule is oxidized, it loses electrons 
D)  Reduction involves the gain of electrons 
A)  Molecular oxygen is always a substrate in oxidation reactions. 
B)  Oxidation reactions involve the movement of electrons from one molecule to another 
C)  When a molecule is oxidized, it loses electrons 
D)  Reduction involves the gain of electrons

Question 11

In order to initiate many metabolic pathways it is necessary to activate the starting materials.

Accepted Answer

A) True 
 B)False

Question 12

The hydrolysis of ATP can be used to drive reactions that have a DG° that is

Accepted Answer

A)  greater than +5 kJ/mol 
B)  less than +5 kJ/mol 
C)  between +20 and +40 kJ/mol 
D)  not possible to determine from the information in this chapter 
A)  greater than +5 kJ/mol 
B)  less than +5 kJ/mol 
C)  between +20 and +40 kJ/mol 
D)  not possible to determine from the information in this chapter

Question 13

Consider this rxn which has a DG° = +0.4 kJ/mol. succinate + FAD « fumarate + FADH2

1 mM of each compound are mixed & the reaction is allowed to come to equilibrium.Which statement is correct about the resulting concentration of FAD at equilibrium?

Accepted Answer

A)  [FAD] > [FADH2] 
B)  [FAD] 2] 
C)  [FAD] = [FADH2] 
D)  Cannot be determined from the information provided. 
A)  [FAD] > [FADH2] 
B)  [FAD] 2] 
C)  [FAD] = [FADH2] 
D)  Cannot be determined from the information provided.

Question 14

What happens to the entropy when ATP is hydrolysed to ADP?

Accepted Answer

A)  Entropy increases 
B)  Entropy decreases. 
C)  Entropy doesn't change. 
D)  ATP has no entropy. 
A)  Entropy increases 
B)  Entropy decreases. 
C)  Entropy doesn't change. 
D)  ATP has no entropy.

Question 15

Exhibit 15A   Consider the reaction of alcohol dehydrogenase.
Refer to Exhibit 15A.Which molecule is reduced?

Accepted Answer

A)  Ethanol 
B)  NAD+ 
C)  Acetaldehyde 
D)  NADH 
E)  H+ 
A)  Ethanol 
B)  NAD+ 
C)  Acetaldehyde 
D)  NADH 
E)  H+

Question 16

ATP is a good source of energy to run metabolic reactions for all the following reasons,except:

Accepted Answer

A)  The pyrophosphate bond has a high energy of hydrolysis. 
B)  The sugar group is very reactive. 
C)  The bonds between the phosphates are acid anhydrides. 
D)  The phosphate groups can combine readily with other molecules. 
E)  All of these explain why ATP is a good energy source. 
A)  The pyrophosphate bond has a high energy of hydrolysis. 
B)  The sugar group is very reactive. 
C)  The bonds between the phosphates are acid anhydrides. 
D)  The phosphate groups can combine readily with other molecules. 
E)  All of these explain why ATP is a good energy source.

Which of the following is not true concerning standard states?

Exhibit 15A Consider the reaction of alcohol dehydrogenase. Refer to Exhibit 15A.Which is the oxidizing agent?

The phosphorylation of ADP to produce ATP is endergonic because

During reduction

In metabolism the term "activation" refers to

Which of the following are examples of exergonic processes?

Which of the following statements apply to anabolism?

The linking of an exergonic reaction to drive an endergonic reaction is called:

The standard state usually used in biochemistry (DG°') includes

Which of the following is not true?

In order to initiate many metabolic pathways it is necessary to activate the starting materials.

The hydrolysis of ATP can be used to drive reactions that have a DG° that is

Consider this rxn which has a DG° = +0.4 kJ/mol. succinate + FAD « fumarate + FADH₂ 1 mM of each compound are mixed & the reaction is allowed to come to equilibrium.Which statement is correct about the resulting concentration of FAD at equilibrium?

What happens to the entropy when ATP is hydrolysed to ADP?

Exhibit 15A Consider the reaction of alcohol dehydrogenase. Refer to Exhibit 15A.Which molecule is reduced?

ATP is a good source of energy to run metabolic reactions for all the following reasons,except:

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

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: Biosynthesis of Rna

Protein Synthesis: Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses, Cancer, and Immunology

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 15: The Importance of Energy Changes and Electron Transfer in Metabolism

Which of the following is not true concerning standard states?

Exhibit 15A Consider the reaction of alcohol dehydrogenase. Refer to Exhibit 15A.Which is the oxidizing agent?

The phosphorylation of ADP to produce ATP is endergonic because

During reduction

In metabolism the term "activation" refers to

Which of the following are examples of exergonic processes?

Which of the following statements apply to anabolism?

The linking of an exergonic reaction to drive an endergonic reaction is called:

The standard state usually used in biochemistry (DG°') includes

Which of the following is not true?

In order to initiate many metabolic pathways it is necessary to activate the starting materials.

The hydrolysis of ATP can be used to drive reactions that have a DG° that is

Consider this rxn which has a DG° = +0.4 kJ/mol. succinate + FAD « fumarate + FADH2 1 mM of each compound are mixed & the reaction is allowed to come to equilibrium.Which statement is correct about the resulting concentration of FAD at equilibrium?

What happens to the entropy when ATP is hydrolysed to ADP?

Exhibit 15A Consider the reaction of alcohol dehydrogenase. Refer to Exhibit 15A.Which molecule is reduced?

ATP is a good source of energy to run metabolic reactions for all the following reasons,except:

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

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: Biosynthesis of Rna

Protein Synthesis: Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses, Cancer, and Immunology

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

Consider this rxn which has a DG° = +0.4 kJ/mol. succinate + FAD « fumarate + FADH₂ 1 mM of each compound are mixed & the reaction is allowed to come to equilibrium.Which statement is correct about the resulting concentration of FAD at equilibrium?