BIOD 101 – MODULE 3 PRACTICE EXAM
Portage Learning – Foundations of Biology I (2025 Edition)
Metabolic Pathways, Cellular Respiration, Glycolysis, CAC, ETC, Fermentation
Practice Set Overview
• Total Questions: 100
• Includes:
o True/False
o Fill-in-the-Blank
o Short Answer
o Definitions
Topics Covered
• Chemical reactions: Redox, Hydrolysis, Dehydration, Condensation
• Metabolic classifications: Catabolism vs. Anabolism
• Glycolysis phases: Investment and Payoff
• Energy carriers: ATP, NADH, FADH₂
• Citric Acid Cycle (Krebs Cycle): Steps and intermediates
• Electron Transport Chain (ETC): Complexes I–IV, Ubiquinone, Cytochrome C
• ATP Synthase and Oxidative Phosphorylation
• Anaerobic Respiration and Fermentation (Alcohol and Lactic Acid)
• Enzymes: Hexokinase, Phosphofructokinase, Aldolase, Pyruvate kinase
• Energy yield calculations: Aerobic vs. Anaerobic pathways
Who Should Use This
• Portage Learning students preparing for Module 3 exams
• Biology students seeking to master cellular respiration and energy pathways
• Those reviewing biochemical reactions and ATP production mechanisms
Compiled: 2025
Course: BIOD 101 – Foundations of Biology I
Institution: Portage Learning
Exam Style: Verified Q&A structured like real Portage module assessments
, PORTAGE LEARNING BIOD 101 – MODULE 3
1. True or False
Statement: ATP synthase is directly powered by the transfer of electrons.
Answer: False
ATP synthase is powered by the proton gradient across the inner mitochondrial membrane.
2. Fill in the Blank
Question: In glycolysis, the molecule glucose is broken down into two molecules of ________.
Answer: Pyruvate
3. Short Answer
Question: What is the net ATP yield from glycolysis per glucose molecule?
Answer: 2 ATP (4 ATP produced - 2 ATP used)
4. Definition
Term: Oxidative Phosphorylation
Definition: The process of ATP formation driven by the transfer of electrons through the
electron transport chain to oxygen.
5. True or False
Statement: FADH₂ donates electrons to Complex I in the electron transport chain.
Answer: False
FADH₂ donates electrons to Complex II.
Portage Learning – Foundations of Biology I (2025 Edition)
Metabolic Pathways, Cellular Respiration, Glycolysis, CAC, ETC, Fermentation
Practice Set Overview
• Total Questions: 100
• Includes:
o True/False
o Fill-in-the-Blank
o Short Answer
o Definitions
Topics Covered
• Chemical reactions: Redox, Hydrolysis, Dehydration, Condensation
• Metabolic classifications: Catabolism vs. Anabolism
• Glycolysis phases: Investment and Payoff
• Energy carriers: ATP, NADH, FADH₂
• Citric Acid Cycle (Krebs Cycle): Steps and intermediates
• Electron Transport Chain (ETC): Complexes I–IV, Ubiquinone, Cytochrome C
• ATP Synthase and Oxidative Phosphorylation
• Anaerobic Respiration and Fermentation (Alcohol and Lactic Acid)
• Enzymes: Hexokinase, Phosphofructokinase, Aldolase, Pyruvate kinase
• Energy yield calculations: Aerobic vs. Anaerobic pathways
Who Should Use This
• Portage Learning students preparing for Module 3 exams
• Biology students seeking to master cellular respiration and energy pathways
• Those reviewing biochemical reactions and ATP production mechanisms
Compiled: 2025
Course: BIOD 101 – Foundations of Biology I
Institution: Portage Learning
Exam Style: Verified Q&A structured like real Portage module assessments
, PORTAGE LEARNING BIOD 101 – MODULE 3
1. True or False
Statement: ATP synthase is directly powered by the transfer of electrons.
Answer: False
ATP synthase is powered by the proton gradient across the inner mitochondrial membrane.
2. Fill in the Blank
Question: In glycolysis, the molecule glucose is broken down into two molecules of ________.
Answer: Pyruvate
3. Short Answer
Question: What is the net ATP yield from glycolysis per glucose molecule?
Answer: 2 ATP (4 ATP produced - 2 ATP used)
4. Definition
Term: Oxidative Phosphorylation
Definition: The process of ATP formation driven by the transfer of electrons through the
electron transport chain to oxygen.
5. True or False
Statement: FADH₂ donates electrons to Complex I in the electron transport chain.
Answer: False
FADH₂ donates electrons to Complex II.
