Portage Learning Microbiology
BIOD 171 | Module 2 Exam |
Questions & Verified Answers | A+
Graded | 2025/2026 Edition
Section 1: Introduction
This document provides the verified Module 2 Exam for BIOD 171 – Microbiology from
Portage Learning, updated for the 2025/2026 academic cycle. It covers essential topics in
microbial metabolism, including energy production, enzymatic reactions, and metabolic
pathways. All questions include 100% accurate answers, A+ graded, to support student
success in mastering microbial processes.
Section 2: Exam Questions and Answers
Format: Multiple-choice questions
• Four answer choices per question (A–D)
• Correct answer highlighted
• Includes clarifying notes where applicable
1. What is the primary source of energy for cellular metabolism?
(a) Oxygen
(b) Glucose
(c) Water
(d) Nitrogen
Glucose
Note: Glucose is a key carbohydrate broken down to produce ATP.
2. What role do enzymes play in metabolism?
(a) Store energy
(b) Catalyze chemical reactions
(c) Transport oxygen
(d) Synthesize DNA
Catalyze chemical reactions
Note: Enzymes lower activation energy to speed up reactions.
3. Which molecule is the primary energy currency of cells?
(a) ADP
(b) ATP
, (c) NAD+
(d) FAD
ATP
Note: ATP stores and releases energy via phosphate bonds.
4. What is the final electron acceptor in aerobic respiration?
(a) NAD+
(b) Oxygen
(c) Carbon dioxide
(d) Water
Oxygen
Note: Oxygen accepts electrons to form water in the electron transport chain.
5. Which process generates the most ATP during cellular respiration?
(a) Glycolysis
(b) Krebs cycle
(c) Electron transport chain
(d) Fermentation
Electron transport chain
Note: It produces up to 34 ATP molecules per glucose.
6. What is the main product of glycolysis?
(a) Pyruvate
(b) Acetyl-CoA
(c) Lactate
(d) Ethanol
Pyruvate
Note: Glycolysis converts glucose to pyruvate, yielding 2 ATP.
7. In which cellular compartment does the Krebs cycle occur?
(a) Cytoplasm
(b) Mitochondrial matrix
(c) Inner mitochondrial membrane
(d) Nucleus
Mitochondrial matrix
Note: The matrix is the site of the citric acid cycle.
8. What molecule is reduced to form NADH during glycolysis?
(a) Glucose
BIOD 171 | Module 2 Exam |
Questions & Verified Answers | A+
Graded | 2025/2026 Edition
Section 1: Introduction
This document provides the verified Module 2 Exam for BIOD 171 – Microbiology from
Portage Learning, updated for the 2025/2026 academic cycle. It covers essential topics in
microbial metabolism, including energy production, enzymatic reactions, and metabolic
pathways. All questions include 100% accurate answers, A+ graded, to support student
success in mastering microbial processes.
Section 2: Exam Questions and Answers
Format: Multiple-choice questions
• Four answer choices per question (A–D)
• Correct answer highlighted
• Includes clarifying notes where applicable
1. What is the primary source of energy for cellular metabolism?
(a) Oxygen
(b) Glucose
(c) Water
(d) Nitrogen
Glucose
Note: Glucose is a key carbohydrate broken down to produce ATP.
2. What role do enzymes play in metabolism?
(a) Store energy
(b) Catalyze chemical reactions
(c) Transport oxygen
(d) Synthesize DNA
Catalyze chemical reactions
Note: Enzymes lower activation energy to speed up reactions.
3. Which molecule is the primary energy currency of cells?
(a) ADP
(b) ATP
, (c) NAD+
(d) FAD
ATP
Note: ATP stores and releases energy via phosphate bonds.
4. What is the final electron acceptor in aerobic respiration?
(a) NAD+
(b) Oxygen
(c) Carbon dioxide
(d) Water
Oxygen
Note: Oxygen accepts electrons to form water in the electron transport chain.
5. Which process generates the most ATP during cellular respiration?
(a) Glycolysis
(b) Krebs cycle
(c) Electron transport chain
(d) Fermentation
Electron transport chain
Note: It produces up to 34 ATP molecules per glucose.
6. What is the main product of glycolysis?
(a) Pyruvate
(b) Acetyl-CoA
(c) Lactate
(d) Ethanol
Pyruvate
Note: Glycolysis converts glucose to pyruvate, yielding 2 ATP.
7. In which cellular compartment does the Krebs cycle occur?
(a) Cytoplasm
(b) Mitochondrial matrix
(c) Inner mitochondrial membrane
(d) Nucleus
Mitochondrial matrix
Note: The matrix is the site of the citric acid cycle.
8. What molecule is reduced to form NADH during glycolysis?
(a) Glucose
