ACT 300 / BC 351: HIGH-TRAFFIC ACCOUNTING AND BIOCHEMISTRY FINAL EXAM – PRACTICE
QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF.
CORE DOMAINS
Financial Reporting and AnalysisEnzymatic Catalysis and KineticsCost Accounting and Management
ControlMetabolic Pathways and RegulationAuditing and Professional EthicsMolecular Biology and
GeneticsRegulatory Compliance and Tax LawProtein Structure and Function
INTRODUCTION
The purpose of this comprehensive examination is to evaluate the student's mastery of both advanced accounting
principles and fundamental biochemistry concepts. This assessment is designed to test a broad range of skills,
including quantitative analysis, theoretical application, and ethical reasoning. The exam consists of 200 multiple-
choice questions, incorporating both foundational theory and complex, scenario-based problems. Students are
expected to demonstrate proficiency in decision-making and real-world application within both professional
laboratory and corporate financial environments. By navigating these diverse domains, candidates prove their
readiness for high-stakes professional certification and practical career challenges, ensuring a rigorous validation
of their academic expertise.
SECTION ONE: QUESTIONS 1–100
1. Which of the following best describes the effect of a competitive inhibitor on enzyme kinetics?
A. Increases Vmax and decreases Km
B. Decreases Vmax and has no effect on Km
C. Vmax remains unchanged and Km increases
D. Both Vmax and Km decrease
,🟢 C. Vmax remains unchanged and Km increases
🔴 RATIONALE: Competitive inhibitors bind to the active site, increasing the concentration of substrate needed
to reach half-maximal velocity, thus increasing Km, while the maximal velocity (Vmax) can still be reached at
high substrate concentrations.
2. Under US GAAP, which of the following is a requirement for recognizing revenue from a contract with a
customer?
A. The payment must be received in full before recognition
B. The entity has transferred control of the goods or services to the customer
C. The contract must be written and notarized by a third party
D. The goods must have a guaranteed salvage value
🟢 B. The entity has transferred control of the goods or services to the customer
🔴 RATIONALE: Revenue recognition is based on the transfer of control under the five-step model of ASC 606,
rather than strictly on the timing of cash receipts.
3. In protein structure, which type of bond is primarily responsible for stabilizing the alpha-helix and beta-
pleated sheet?
A. Disulfide bridges
B. Ionic bonds
C. Hydrogen bonds
D. Phosphodiester bonds
🟢 C. Hydrogen bonds
,🔴 RATIONALE: Secondary structures like alpha-helices and beta-sheets are stabilized by hydrogen bonding
between the carbonyl oxygen and the amide hydrogen of the polypeptide backbone.
4. A company uses a perpetual inventory system. If the ending inventory is overstated at the end of Year 1,
what is the effect on Year 2 net income?
A. Year 2 net income will be understated
B. Year 2 net income will be overstated
C. Year 2 net income will be unaffected
D. Year 2 gross profit will be higher than actual
🟢 A. Year 2 net income will be understated
🔴 RATIONALE: Overstated ending inventory in Year 1 becomes overstated beginning inventory in Year 2. This
increases the Cost of Goods Sold for Year 2, which in turn understates the net income for that period.
5. Which molecule serves as the primary "energy currency" of the cell, providing the necessary energy for
endergonic reactions?
A. Glucose-6-phosphate
B. Adenosine triphosphate (ATP)
C. Nicotinamide adenine dinucleotide (NAD+)
D. Acetyl-CoA
🟢 B. Adenosine triphosphate (ATP)
🔴 RATIONALE: ATP is the universal energy donor in biological systems; the hydrolysis of its phosphoanhydride
bonds releases energy used to drive thermodynamically unfavorable reactions.
, 6. Which of the following costs is considered a "period cost" rather than a "product cost" under absorption
costing?
A. Direct materials
B. Variable manufacturing overhead
C. Administrative salaries
D. Factory depreciation
🟢 C. Administrative salaries
🔴 RATIONALE: Period costs are expensed in the period incurred and are not tied to the production of goods.
Administrative salaries fall under selling, general, and administrative (SG&A) expenses.
7. The pH at which a molecule carries no net electrical charge is known as its:
A. Dissociation constant
B. pKa
C. Isoelectric point (pI)
D. Buffer capacity
🟢 C. Isoelectric point (pI)
🔴 RATIONALE: The isoelectric point is the specific pH at which the positive and negative charges on a
zwitterion or protein balance out to zero net charge.
8. According to the Sarbanes-Oxley Act (SOX), who is responsible for the accuracy and completeness of the
financial statements?
A. The external audit firm
B. The internal audit department
QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF.
CORE DOMAINS
Financial Reporting and AnalysisEnzymatic Catalysis and KineticsCost Accounting and Management
ControlMetabolic Pathways and RegulationAuditing and Professional EthicsMolecular Biology and
GeneticsRegulatory Compliance and Tax LawProtein Structure and Function
INTRODUCTION
The purpose of this comprehensive examination is to evaluate the student's mastery of both advanced accounting
principles and fundamental biochemistry concepts. This assessment is designed to test a broad range of skills,
including quantitative analysis, theoretical application, and ethical reasoning. The exam consists of 200 multiple-
choice questions, incorporating both foundational theory and complex, scenario-based problems. Students are
expected to demonstrate proficiency in decision-making and real-world application within both professional
laboratory and corporate financial environments. By navigating these diverse domains, candidates prove their
readiness for high-stakes professional certification and practical career challenges, ensuring a rigorous validation
of their academic expertise.
SECTION ONE: QUESTIONS 1–100
1. Which of the following best describes the effect of a competitive inhibitor on enzyme kinetics?
A. Increases Vmax and decreases Km
B. Decreases Vmax and has no effect on Km
C. Vmax remains unchanged and Km increases
D. Both Vmax and Km decrease
,🟢 C. Vmax remains unchanged and Km increases
🔴 RATIONALE: Competitive inhibitors bind to the active site, increasing the concentration of substrate needed
to reach half-maximal velocity, thus increasing Km, while the maximal velocity (Vmax) can still be reached at
high substrate concentrations.
2. Under US GAAP, which of the following is a requirement for recognizing revenue from a contract with a
customer?
A. The payment must be received in full before recognition
B. The entity has transferred control of the goods or services to the customer
C. The contract must be written and notarized by a third party
D. The goods must have a guaranteed salvage value
🟢 B. The entity has transferred control of the goods or services to the customer
🔴 RATIONALE: Revenue recognition is based on the transfer of control under the five-step model of ASC 606,
rather than strictly on the timing of cash receipts.
3. In protein structure, which type of bond is primarily responsible for stabilizing the alpha-helix and beta-
pleated sheet?
A. Disulfide bridges
B. Ionic bonds
C. Hydrogen bonds
D. Phosphodiester bonds
🟢 C. Hydrogen bonds
,🔴 RATIONALE: Secondary structures like alpha-helices and beta-sheets are stabilized by hydrogen bonding
between the carbonyl oxygen and the amide hydrogen of the polypeptide backbone.
4. A company uses a perpetual inventory system. If the ending inventory is overstated at the end of Year 1,
what is the effect on Year 2 net income?
A. Year 2 net income will be understated
B. Year 2 net income will be overstated
C. Year 2 net income will be unaffected
D. Year 2 gross profit will be higher than actual
🟢 A. Year 2 net income will be understated
🔴 RATIONALE: Overstated ending inventory in Year 1 becomes overstated beginning inventory in Year 2. This
increases the Cost of Goods Sold for Year 2, which in turn understates the net income for that period.
5. Which molecule serves as the primary "energy currency" of the cell, providing the necessary energy for
endergonic reactions?
A. Glucose-6-phosphate
B. Adenosine triphosphate (ATP)
C. Nicotinamide adenine dinucleotide (NAD+)
D. Acetyl-CoA
🟢 B. Adenosine triphosphate (ATP)
🔴 RATIONALE: ATP is the universal energy donor in biological systems; the hydrolysis of its phosphoanhydride
bonds releases energy used to drive thermodynamically unfavorable reactions.
, 6. Which of the following costs is considered a "period cost" rather than a "product cost" under absorption
costing?
A. Direct materials
B. Variable manufacturing overhead
C. Administrative salaries
D. Factory depreciation
🟢 C. Administrative salaries
🔴 RATIONALE: Period costs are expensed in the period incurred and are not tied to the production of goods.
Administrative salaries fall under selling, general, and administrative (SG&A) expenses.
7. The pH at which a molecule carries no net electrical charge is known as its:
A. Dissociation constant
B. pKa
C. Isoelectric point (pI)
D. Buffer capacity
🟢 C. Isoelectric point (pI)
🔴 RATIONALE: The isoelectric point is the specific pH at which the positive and negative charges on a
zwitterion or protein balance out to zero net charge.
8. According to the Sarbanes-Oxley Act (SOX), who is responsible for the accuracy and completeness of the
financial statements?
A. The external audit firm
B. The internal audit department
