PORTAGE LEARNING • GENEVA COLLEGE
CHEM 210
Module 8 Examination
Biochemistry •
Nucleic Acids, DNA Replication, Transcription & Translation
Total Questions 50 (Multiple Choice, A–D)
Sections 6 sections covering Module 8 competencies
Cognitive Mix 30% Recall • 50% Application • 20% Analysis
70% Scenario-based • 25% Direct recall • 5% Structural
Question Style
analysis
Aligned Curriculum 2026–2027 Portage Learning / Geneva College CHEM 210
Examination Instructions
This examination consists of 50 multiple-choice questions distributed across six sections.
Each question has exactly one correct answer (A, B, C, or D).
Correct answers are marked with [CORRECT] and are accompanied by a comprehensive
biochemistry rationale explaining the underlying mechanism.
Questions integrate foundational recall, applied reasoning, and multi-step analysis across
nucleic acid structure, DNA replication, transcription, translation, and integrated biochemical
scenarios.
All content is aligned with the 2026–2027 Portage Learning / Geneva College CHEM 210
Module 8 curriculum standards and biochemistry competencies.
CHEM 210 Module 8 Examination • 2026/2027 Edition
,CHEM 210 • Module 8 Exam • Biochemistry Geneva College • Portage Learning • 2026/2027
A+ Verified Examination • 50 Questions with Comprehensive Rationales
Page 2
, CHEM 210 • Module 8 Exam • Biochemistry Geneva College • Portage Learning • 2026/2027
Section 1: Nucleic Acid Fundamentals
Nucleotide Structure, Bases, & Nucleosides • Questions 1–10
Q1: A nucleotide is composed of three covalently linked components. Which combination correctly identifies
these three components?
A. An amino group, a pentose sugar, and a nitrogenous base
B. A phosphate group, a pentose sugar, and a nitrogenous base [CORRECT]
C. A phosphate group, a hexose sugar, and a nitrogenous base
D. A hydroxyl group, a deoxyribose, and a nitrogenous base
Correct Answer: B
Rationale: A nucleotide consists of a phosphate group esterified to the 5' carbon of a pentose sugar (deoxyribose in
DNA, ribose in RNA), the pentose sugar itself, and a nitrogenous base (purine or pyrimidine) attached to the 1' carbon.
Hexose sugars are not found in nucleic acids, and amino/hydroxyl substituents are not defining components of a
nucleotide.
Q2: A researcher isolates a molecule consisting of ribose covalently bonded to adenine, with no phosphate
group attached. How should this molecule be classified?
A. A nucleotide, because it contains a sugar-base linkage
B. A nucleoside, because it contains only sugar and base, lacking a phosphate [CORRECT]
C. A nucleotide fragment missing its 5' phosphate
D. A free purine base in unbound form
Correct Answer: B
Rationale: A nucleoside is defined as a pentose sugar bonded to a nitrogenous base without any phosphate group; the
addition of one or more phosphate groups converts it into a nucleotide. Ribose bonded to adenine with no phosphate is
adenosine, the nucleoside form, which is structurally distinct from AMP, ADP, or ATP.
Q3: Which of the following correctly pairs the two purine bases found in both DNA and RNA?
A. Cytosine and Thymine
B. Adenine and Guanine [CORRECT]
C. Adenine and Cytosine
D. Guanine and Uracil
Correct Answer: B
Rationale: Purines are double-ring nitrogenous bases; in both DNA and RNA the purines are adenine (A) and guanine
(G). Cytosine, thymine (DNA only), and uracil (RNA only) are single-ring pyrimidines. The other options each mix a
purine with a pyrimidine, reflecting a common classification error on Module 8 exams.
Page 3
CHEM 210
Module 8 Examination
Biochemistry •
Nucleic Acids, DNA Replication, Transcription & Translation
Total Questions 50 (Multiple Choice, A–D)
Sections 6 sections covering Module 8 competencies
Cognitive Mix 30% Recall • 50% Application • 20% Analysis
70% Scenario-based • 25% Direct recall • 5% Structural
Question Style
analysis
Aligned Curriculum 2026–2027 Portage Learning / Geneva College CHEM 210
Examination Instructions
This examination consists of 50 multiple-choice questions distributed across six sections.
Each question has exactly one correct answer (A, B, C, or D).
Correct answers are marked with [CORRECT] and are accompanied by a comprehensive
biochemistry rationale explaining the underlying mechanism.
Questions integrate foundational recall, applied reasoning, and multi-step analysis across
nucleic acid structure, DNA replication, transcription, translation, and integrated biochemical
scenarios.
All content is aligned with the 2026–2027 Portage Learning / Geneva College CHEM 210
Module 8 curriculum standards and biochemistry competencies.
CHEM 210 Module 8 Examination • 2026/2027 Edition
,CHEM 210 • Module 8 Exam • Biochemistry Geneva College • Portage Learning • 2026/2027
A+ Verified Examination • 50 Questions with Comprehensive Rationales
Page 2
, CHEM 210 • Module 8 Exam • Biochemistry Geneva College • Portage Learning • 2026/2027
Section 1: Nucleic Acid Fundamentals
Nucleotide Structure, Bases, & Nucleosides • Questions 1–10
Q1: A nucleotide is composed of three covalently linked components. Which combination correctly identifies
these three components?
A. An amino group, a pentose sugar, and a nitrogenous base
B. A phosphate group, a pentose sugar, and a nitrogenous base [CORRECT]
C. A phosphate group, a hexose sugar, and a nitrogenous base
D. A hydroxyl group, a deoxyribose, and a nitrogenous base
Correct Answer: B
Rationale: A nucleotide consists of a phosphate group esterified to the 5' carbon of a pentose sugar (deoxyribose in
DNA, ribose in RNA), the pentose sugar itself, and a nitrogenous base (purine or pyrimidine) attached to the 1' carbon.
Hexose sugars are not found in nucleic acids, and amino/hydroxyl substituents are not defining components of a
nucleotide.
Q2: A researcher isolates a molecule consisting of ribose covalently bonded to adenine, with no phosphate
group attached. How should this molecule be classified?
A. A nucleotide, because it contains a sugar-base linkage
B. A nucleoside, because it contains only sugar and base, lacking a phosphate [CORRECT]
C. A nucleotide fragment missing its 5' phosphate
D. A free purine base in unbound form
Correct Answer: B
Rationale: A nucleoside is defined as a pentose sugar bonded to a nitrogenous base without any phosphate group; the
addition of one or more phosphate groups converts it into a nucleotide. Ribose bonded to adenine with no phosphate is
adenosine, the nucleoside form, which is structurally distinct from AMP, ADP, or ATP.
Q3: Which of the following correctly pairs the two purine bases found in both DNA and RNA?
A. Cytosine and Thymine
B. Adenine and Guanine [CORRECT]
C. Adenine and Cytosine
D. Guanine and Uracil
Correct Answer: B
Rationale: Purines are double-ring nitrogenous bases; in both DNA and RNA the purines are adenine (A) and guanine
(G). Cytosine, thymine (DNA only), and uracil (RNA only) are single-ring pyrimidines. The other options each mix a
purine with a pyrimidine, reflecting a common classification error on Module 8 exams.
Page 3
