BIOL 271 Module 2 Exam Practice Questions &
Answers (Verified Update)
This comprehensive study guide covers the core domains tested
on BIOL 271 Module 2: Microbial Metabolism, Enzymes,
Cellular Respiration & Photosynthesis at Portage Learning. It
includes original practice questions with detailed rationales,
organized by the core exam domains: Microbial Metabolism &
Energy, Enzyme Structure & Function, Cellular Respiration
(Glycolysis, Krebs Cycle, ETC), Fermentation & Alternative
Energy Sources, and Photosynthesis (Oxygenic & Anoxygenic) .
Exam Overview & Blueprint:
Parameter Details
Exam Format LockDown Browser, multiple-choice, matching, and short-answer question
Module 2 Microbial metabolism, enzyme catalysis, ATP synthesis, glycolysis,
Coverage fermentation, catabolism, anabolism, and photosynthesis
Catabolism vs. anabolism, enzyme kinetics, cofactors, glycolysis, Krebs cyc
Core Topics
ETC, fermentation, photosynthesis
Scenario-based application questions, metabolic pathway integration, ene
2026 Focus
yield calculations
,Section 1: Microbial Metabolism & Energy
Q1. Which term describes the sum of all chemical reactions that
occur within a living organism?
A) Anabolism
B) Catabolism
C) Metabolism
D) Homeostasis
Answer: C
Rationale: Metabolism is the total of all biochemical reactions
in an organism, encompassing both catabolic (breakdown) and
anabolic (synthesis) reactions that occur simultaneously to
maintain life.
Q2. The breakdown of large molecules into smaller ones,
releasing energy, is termed:
A) Catabolism
B) Anabolism
C) Endergonic synthesis
D) Feedback inhibition
Answer: A
Rationale: Catabolism is the degradative, exergonic process of
breaking down larger molecules into smaller ones, releasing
,energy that is captured in the form of ATP. Anabolism is
synthetic and endergonic.
Q3. The building of complex molecules from simpler ones,
requiring energy input, is known as:
A) Catabolism
B) Metabolism
C) Anabolism
D) Fermentation
Answer: C
Rationale: Anabolism is the endergonic process of synthesizing
complex cellular components from simpler precursors, requiring
the energy derived from catabolic reactions. This process is
essential for cell growth, repair, and reproduction.
Q4. During the growth and repair phase after a cell injury, which
metabolic process is primarily active?
A) Catabolism
B) Anabolism
C) Fermentation
D) Glycolysis
Answer: B
Rationale: During growth and repair, anabolism is primarily
active because the cell is synthesizing new complex molecules
, (proteins, nucleic acids, lipids) to rebuild damaged structures,
which requires energy input.
Q5. A microbiologist is studying two metabolic pathways in a
bacterial cell. Pathway A breaks down glucose into pyruvate,
releasing energy stored as ATP. Pathway B assembles amino
acids into a polypeptide chain, consuming ATP. Which pair
correctly identifies Pathway A and Pathway B?
A) A: Anabolism; B: Catabolism
B) A: Catabolism; B: Anabolism
C) A: Fermentation; B: Respiration
D) A: Photosynthesis; B: Glycolysis
Answer: B
Rationale: Pathway A is catabolism because it breaks down
complex glucose into simpler pyruvate while releasing energy.
Pathway B is anabolism because it synthesizes a complex
polypeptide from simpler amino acids while requiring energy
input.
Q6. What is the primary role of ATP in the cell?
A) Store genetic information
B) Serve as the primary energy currency
C) Catalyze biochemical reactions
D) Provide structural support
Answers (Verified Update)
This comprehensive study guide covers the core domains tested
on BIOL 271 Module 2: Microbial Metabolism, Enzymes,
Cellular Respiration & Photosynthesis at Portage Learning. It
includes original practice questions with detailed rationales,
organized by the core exam domains: Microbial Metabolism &
Energy, Enzyme Structure & Function, Cellular Respiration
(Glycolysis, Krebs Cycle, ETC), Fermentation & Alternative
Energy Sources, and Photosynthesis (Oxygenic & Anoxygenic) .
Exam Overview & Blueprint:
Parameter Details
Exam Format LockDown Browser, multiple-choice, matching, and short-answer question
Module 2 Microbial metabolism, enzyme catalysis, ATP synthesis, glycolysis,
Coverage fermentation, catabolism, anabolism, and photosynthesis
Catabolism vs. anabolism, enzyme kinetics, cofactors, glycolysis, Krebs cyc
Core Topics
ETC, fermentation, photosynthesis
Scenario-based application questions, metabolic pathway integration, ene
2026 Focus
yield calculations
,Section 1: Microbial Metabolism & Energy
Q1. Which term describes the sum of all chemical reactions that
occur within a living organism?
A) Anabolism
B) Catabolism
C) Metabolism
D) Homeostasis
Answer: C
Rationale: Metabolism is the total of all biochemical reactions
in an organism, encompassing both catabolic (breakdown) and
anabolic (synthesis) reactions that occur simultaneously to
maintain life.
Q2. The breakdown of large molecules into smaller ones,
releasing energy, is termed:
A) Catabolism
B) Anabolism
C) Endergonic synthesis
D) Feedback inhibition
Answer: A
Rationale: Catabolism is the degradative, exergonic process of
breaking down larger molecules into smaller ones, releasing
,energy that is captured in the form of ATP. Anabolism is
synthetic and endergonic.
Q3. The building of complex molecules from simpler ones,
requiring energy input, is known as:
A) Catabolism
B) Metabolism
C) Anabolism
D) Fermentation
Answer: C
Rationale: Anabolism is the endergonic process of synthesizing
complex cellular components from simpler precursors, requiring
the energy derived from catabolic reactions. This process is
essential for cell growth, repair, and reproduction.
Q4. During the growth and repair phase after a cell injury, which
metabolic process is primarily active?
A) Catabolism
B) Anabolism
C) Fermentation
D) Glycolysis
Answer: B
Rationale: During growth and repair, anabolism is primarily
active because the cell is synthesizing new complex molecules
, (proteins, nucleic acids, lipids) to rebuild damaged structures,
which requires energy input.
Q5. A microbiologist is studying two metabolic pathways in a
bacterial cell. Pathway A breaks down glucose into pyruvate,
releasing energy stored as ATP. Pathway B assembles amino
acids into a polypeptide chain, consuming ATP. Which pair
correctly identifies Pathway A and Pathway B?
A) A: Anabolism; B: Catabolism
B) A: Catabolism; B: Anabolism
C) A: Fermentation; B: Respiration
D) A: Photosynthesis; B: Glycolysis
Answer: B
Rationale: Pathway A is catabolism because it breaks down
complex glucose into simpler pyruvate while releasing energy.
Pathway B is anabolism because it synthesizes a complex
polypeptide from simpler amino acids while requiring energy
input.
Q6. What is the primary role of ATP in the cell?
A) Store genetic information
B) Serve as the primary energy currency
C) Catalyze biochemical reactions
D) Provide structural support
