CELL BIOLOGY 112 EXAM 2 PCC (2025/2026)
Actual Exam with Complete Questions |
Pasadena City College | Cellular Metabolism &
Energy Assessment
Overview
This 2025/2026 validated resource contains the complete Cell Biology 112 Exam 2
from Pasadena City College with actual questions and verified answers, directly
aligned with current PCC curriculum standards. Essential for biology students
preparing for cellular metabolism assessment and demonstrating competency in
energy conversion, metabolic pathways, and membrane transport systems.
Key Features
• ✓ 70-Question Comprehensive Exam matching PCC assessment format
• ✓ Metabolic Pathways & Energy Conversion with biochemical applications
• ✓ Membrane Transport & Compartmentalization with cellular homeostasis
• ✓ Updated 2025/2026 PCC cell biology curriculum standards
• ✓ Enzyme Kinetics & Regulation with metabolic control applications
Content Domains
Content Area Questions Key Topics Weight
Glycolysis, Krebs cycle,
Cellular Respiration & ETC, oxidative
16 23%
Energy Production phosphorylation, ATP
synthesis, fermentation
,Content Area Questions Key Topics Weight
Light reactions, Calvin
Photosynthesis & cycle, photosystems,
14 20%
Light Reactions photophosphorylation,
carbon fixation
Diffusion, osmosis, active
Membrane Transport
13 transport, ion channels, 18%
Mechanisms
pumps, vesicular transport
Kinetics, inhibition,
Enzyme Function & allosteric regulation,
12 17%
Regulation cofactors, metabolic
control
Gluconeogenesis, glycogen
Metabolic Pathway metabolism, fatty acid
9 13%
Integration oxidation, metabolic
interconversions
Organelle structure-
function, protein targeting,
Intracellular
6 membrane trafficking, 9%
Compartmentalization
compartment-specific
metabolism
Answer Format
Verified correct answers in bold with:
• Metabolic pathway explanations
• Energy conversion rationales
• Transport mechanism justifications
, • Regulatory process evaluations
Critical Updates 2025/2026
• NEW - Metabolic flux analysis techniques and modern bioenergetics
• UPDATED - Membrane protein structure-function relationships
• REVISED - ATP synthase mechanism details and rotational catalysis
• MODIFIED - Electron transport chain components and supercomplex
organization
CELLULAR RESPIRATION & ENERGY PRODUCTION (Questions 1–16)
1. The 2025 PCC consensus proton stoichiometry for complex I is:
a) 2 H⁺/e⁻
b) 4 H⁺/e⁻
c) 6 H⁺/e⁻
d) 10 H⁺/e⁻
Correct Answer: b) 4 H⁺/e⁻
Rationale: Cryo-EM structures of mammalian complex I confirm 4 protons are
translocated per electron pair (2 electrons) transferred from NADH to ubiquinone.
2. Which complex of the electron transport chain contains the CuA center?
a) Complex I (NADH dehydrogenase)
b) Complex II (Succinate dehydrogenase)
c) Complex III (Cytochrome bc₁)
d) Complex IV (Cytochrome c oxidase)
Correct Answer: d) Complex IV
Rationale: Complex IV (cytochrome c oxidase) contains the CuA center, which
accepts electrons from cytochrome c and transfers them to the oxygen reduction
site.
Actual Exam with Complete Questions |
Pasadena City College | Cellular Metabolism &
Energy Assessment
Overview
This 2025/2026 validated resource contains the complete Cell Biology 112 Exam 2
from Pasadena City College with actual questions and verified answers, directly
aligned with current PCC curriculum standards. Essential for biology students
preparing for cellular metabolism assessment and demonstrating competency in
energy conversion, metabolic pathways, and membrane transport systems.
Key Features
• ✓ 70-Question Comprehensive Exam matching PCC assessment format
• ✓ Metabolic Pathways & Energy Conversion with biochemical applications
• ✓ Membrane Transport & Compartmentalization with cellular homeostasis
• ✓ Updated 2025/2026 PCC cell biology curriculum standards
• ✓ Enzyme Kinetics & Regulation with metabolic control applications
Content Domains
Content Area Questions Key Topics Weight
Glycolysis, Krebs cycle,
Cellular Respiration & ETC, oxidative
16 23%
Energy Production phosphorylation, ATP
synthesis, fermentation
,Content Area Questions Key Topics Weight
Light reactions, Calvin
Photosynthesis & cycle, photosystems,
14 20%
Light Reactions photophosphorylation,
carbon fixation
Diffusion, osmosis, active
Membrane Transport
13 transport, ion channels, 18%
Mechanisms
pumps, vesicular transport
Kinetics, inhibition,
Enzyme Function & allosteric regulation,
12 17%
Regulation cofactors, metabolic
control
Gluconeogenesis, glycogen
Metabolic Pathway metabolism, fatty acid
9 13%
Integration oxidation, metabolic
interconversions
Organelle structure-
function, protein targeting,
Intracellular
6 membrane trafficking, 9%
Compartmentalization
compartment-specific
metabolism
Answer Format
Verified correct answers in bold with:
• Metabolic pathway explanations
• Energy conversion rationales
• Transport mechanism justifications
, • Regulatory process evaluations
Critical Updates 2025/2026
• NEW - Metabolic flux analysis techniques and modern bioenergetics
• UPDATED - Membrane protein structure-function relationships
• REVISED - ATP synthase mechanism details and rotational catalysis
• MODIFIED - Electron transport chain components and supercomplex
organization
CELLULAR RESPIRATION & ENERGY PRODUCTION (Questions 1–16)
1. The 2025 PCC consensus proton stoichiometry for complex I is:
a) 2 H⁺/e⁻
b) 4 H⁺/e⁻
c) 6 H⁺/e⁻
d) 10 H⁺/e⁻
Correct Answer: b) 4 H⁺/e⁻
Rationale: Cryo-EM structures of mammalian complex I confirm 4 protons are
translocated per electron pair (2 electrons) transferred from NADH to ubiquinone.
2. Which complex of the electron transport chain contains the CuA center?
a) Complex I (NADH dehydrogenase)
b) Complex II (Succinate dehydrogenase)
c) Complex III (Cytochrome bc₁)
d) Complex IV (Cytochrome c oxidase)
Correct Answer: d) Complex IV
Rationale: Complex IV (cytochrome c oxidase) contains the CuA center, which
accepts electrons from cytochrome c and transfers them to the oxygen reduction
site.
