Page 1 of 75
BIOCHEM 210 Module 7 Exam Practice
Questions with Rationales Metabolism
Glycolysis Citric Acid Cycle and
Oxidative Phosphorylation High Yield
Review Pass Your Biochem 210 Module 7
Exam with Confidence
TABLE OF CONTENTS
| Section | Topic | Questions |
| :--- | :--- | :--- |
| 1 | Metabolism Fundamentals | 1 to 15 |
| 2 | Glycolysis Pathway | 16 to 35 |
| 3 | Gluconeogenesis | 36 to 45 |
| 4 | Pyruvate Dehydrogenase Complex | 46 to 55 |
| 5 | Citric Acid Cycle (TCA) | 56 to 70 |
| 6 | Oxidative Phosphorylation | 71 to 85 |
| 7 | Glycogen Metabolism | 86 to 95 |
| 8 | Fatty Acid Oxidation (Beta-Oxidation) | 96 to 105 |
| 9 | Metabolic Integration and Regulation | 106 to 120 |
| 10 | Comprehensive Metabolism Review | 121 to 150 |
SECTION 1: METABOLISM FUNDAMENTALS
Question 1
, Page 2 of 75
True or False: The Delta G value for a particular reaction is -78 kJ per
mol. This value indicates the reaction is spontaneous.
A. True
B. False
Correct VERIFIED ANSWER A
Rationale A negative Delta G indicates that a reaction is exergonic and
spontaneous. It means the products have less free energy than the
reactants and the reaction can proceed without external energy input.
The Delta G value of -78 kJ per mol confirms this reaction is
thermodynamically favorable .
Question 2
True or False: A biochemical metabolic pathway is a single reaction that
converts starting material into products.
A. True
B. False
Correct VERIFIED ANSWER B
Rationale A biochemical metabolic pathway is a series of reactions that
converts starting material into products. Each step is catalyzed by a
specific enzyme. Examples include glycolysis which is a 10-step
pathway and the citric acid cycle which is an 8-step pathway .
Question 3
True or False: Three ATP molecules are used in the energy-investing
stage of glycolysis.
, Page 3 of 75
A. True
B. False
Correct VERIFIED ANSWER B
Rationale In the energy-investing stage of glycolysis, two ATP
molecules are used, not three. The first ATP is used in the hexokinase
reaction converting glucose to glucose-6-phosphate. The second ATP is
used in the phosphofructokinase reaction converting fructose-6-
phosphate to fructose-1,6-bisphosphate .
Question 4
True or False: The citric acid cycle occurs in the absence of oxygen.
A. True
B. False
Correct VERIFIED ANSWER B
Rationale The citric acid cycle requires oxygen indirectly. While oxygen
is not a direct reactant in the TCA cycle, the cycle requires NAD+ and
FAD which must be regenerated by the electron transport chain. Without
oxygen, the electron transport chain stops and the citric acid cycle
cannot continue .
Question 5
True or False: The beta-oxidation pathway degrades both even-
numbered and odd-numbered fatty acids.
A. True
B. False
Correct VERIFIED ANSWER A
, Page 4 of 75
Rationale Beta-oxidation can degrade both even-numbered and odd-
numbered fatty acids. Even-numbered fatty acids produce acetyl-CoA
directly. Odd-numbered fatty acids produce acetyl-CoA and one
propionyl-CoA molecule which is converted to succinyl-CoA and enters
the citric acid cycle .
Question 6
What is the primary goal of metabolism?
A. To break down food only
B. To convert food into energy and building blocks for the body
C. To store all nutrients
D. To eliminate waste products only
Correct VERIFIED ANSWER B
Rationale Metabolism encompasses all chemical reactions that convert
food into energy and building blocks for cellular processes. It includes
both catabolism breaking down molecules and anabolism building
molecules.
Question 7
A scientist uses the term flux regarding a biochemical pathway. What
does flux mean?
A. The number of enzymes in the pathway
B. The rate of flow through a biochemical pathway
C. The total energy produced by the pathway
D. The number of intermediates in the pathway
Correct VERIFIED ANSWER B
BIOCHEM 210 Module 7 Exam Practice
Questions with Rationales Metabolism
Glycolysis Citric Acid Cycle and
Oxidative Phosphorylation High Yield
Review Pass Your Biochem 210 Module 7
Exam with Confidence
TABLE OF CONTENTS
| Section | Topic | Questions |
| :--- | :--- | :--- |
| 1 | Metabolism Fundamentals | 1 to 15 |
| 2 | Glycolysis Pathway | 16 to 35 |
| 3 | Gluconeogenesis | 36 to 45 |
| 4 | Pyruvate Dehydrogenase Complex | 46 to 55 |
| 5 | Citric Acid Cycle (TCA) | 56 to 70 |
| 6 | Oxidative Phosphorylation | 71 to 85 |
| 7 | Glycogen Metabolism | 86 to 95 |
| 8 | Fatty Acid Oxidation (Beta-Oxidation) | 96 to 105 |
| 9 | Metabolic Integration and Regulation | 106 to 120 |
| 10 | Comprehensive Metabolism Review | 121 to 150 |
SECTION 1: METABOLISM FUNDAMENTALS
Question 1
, Page 2 of 75
True or False: The Delta G value for a particular reaction is -78 kJ per
mol. This value indicates the reaction is spontaneous.
A. True
B. False
Correct VERIFIED ANSWER A
Rationale A negative Delta G indicates that a reaction is exergonic and
spontaneous. It means the products have less free energy than the
reactants and the reaction can proceed without external energy input.
The Delta G value of -78 kJ per mol confirms this reaction is
thermodynamically favorable .
Question 2
True or False: A biochemical metabolic pathway is a single reaction that
converts starting material into products.
A. True
B. False
Correct VERIFIED ANSWER B
Rationale A biochemical metabolic pathway is a series of reactions that
converts starting material into products. Each step is catalyzed by a
specific enzyme. Examples include glycolysis which is a 10-step
pathway and the citric acid cycle which is an 8-step pathway .
Question 3
True or False: Three ATP molecules are used in the energy-investing
stage of glycolysis.
, Page 3 of 75
A. True
B. False
Correct VERIFIED ANSWER B
Rationale In the energy-investing stage of glycolysis, two ATP
molecules are used, not three. The first ATP is used in the hexokinase
reaction converting glucose to glucose-6-phosphate. The second ATP is
used in the phosphofructokinase reaction converting fructose-6-
phosphate to fructose-1,6-bisphosphate .
Question 4
True or False: The citric acid cycle occurs in the absence of oxygen.
A. True
B. False
Correct VERIFIED ANSWER B
Rationale The citric acid cycle requires oxygen indirectly. While oxygen
is not a direct reactant in the TCA cycle, the cycle requires NAD+ and
FAD which must be regenerated by the electron transport chain. Without
oxygen, the electron transport chain stops and the citric acid cycle
cannot continue .
Question 5
True or False: The beta-oxidation pathway degrades both even-
numbered and odd-numbered fatty acids.
A. True
B. False
Correct VERIFIED ANSWER A
, Page 4 of 75
Rationale Beta-oxidation can degrade both even-numbered and odd-
numbered fatty acids. Even-numbered fatty acids produce acetyl-CoA
directly. Odd-numbered fatty acids produce acetyl-CoA and one
propionyl-CoA molecule which is converted to succinyl-CoA and enters
the citric acid cycle .
Question 6
What is the primary goal of metabolism?
A. To break down food only
B. To convert food into energy and building blocks for the body
C. To store all nutrients
D. To eliminate waste products only
Correct VERIFIED ANSWER B
Rationale Metabolism encompasses all chemical reactions that convert
food into energy and building blocks for cellular processes. It includes
both catabolism breaking down molecules and anabolism building
molecules.
Question 7
A scientist uses the term flux regarding a biochemical pathway. What
does flux mean?
A. The number of enzymes in the pathway
B. The rate of flow through a biochemical pathway
C. The total energy produced by the pathway
D. The number of intermediates in the pathway
Correct VERIFIED ANSWER B
