CHEM 210 - Biochemistry - Module 1 Exam
Comprehensive Multichoice Question Bank |
A Review of 100 Verified Multichoice
Questions with Answers & Clinical
Rationales (2026 NEW!!)
Table of Contents
Section 1: Foundations of Biochemistry (Questions 1-15)
• Scope of Biochemistry
• Organic vs Inorganic Chemistry
• Biomolecules and Macromolecules
Section 2: Chemical Bonding and Molecular Structure (Questions 16-35)
• Covalent Bonds and Valence Electrons
• Molecular Geometry and Bond Angles
• Carbon Compounds and Functional Groups
Section 3: Molecular Representations (Questions 36-45)
• Structural Formulas
• Line-Bond Drawings
• Condensed Structures
Section 4: Cellular Biology and Organization (Questions 46-70)
• Prokaryotes vs Eukaryotes
• Organelles and Their Functions
• Cellular Membranes
,Section 5: Macromolecules and Supramolecular Complexes (Questions 71-85)
• Monomers and Polymers
• Molecular Mass and Daltons
• Supramolecular Assembly
Section 6: Phylogeny and Cellular Diversity (Questions 86-100)
• Three Domains of Life
• Bacterial and Archaeal Characteristics
• Eukaryotic Cell Specialization
SECTION 1: FOUNDATIONS OF BIOCHEMISTRY
Multichoice
Question 1
Which of the following is NOT a primary area of study for biochemists?
A) The relationship between structure and function of biomolecules
B) Chemical reactions of organisms
C) Classification of organisms based on morphology
D) Communication within and among organisms
Answer: C) Classification of organisms based on morphology
Rationale: Biochemists study the relationship between structure and function of
biomolecules, chemical reactions of organisms, and communication within and
among organisms. Classification based on morphology falls under taxonomy or
systematics, not biochemistry.
Question 2
Smaller elements are favored in biological systems because they:
,A) Have more valence electrons
B) Form stable covalent bonds through significant orbital overlap
C) Are more abundant in the environment
D) Have higher atomic masses
Answer: B) Form stable covalent bonds through significant orbital overlap
Rationale: Smaller elements like carbon and hydrogen form strong, stable covalent
bonds through significant overlap of atomic orbitals, allowing them to share
electrons effectively. This stability is crucial for biological molecules.
Question 3
Which statement about biochemistry is TRUE?
A) Biochemistry only studies reactions in plants
B) Biochemistry focuses exclusively on human metabolism
C) Biochemistry examines chemical processes within and related to living
organisms
D) Biochemistry is identical to organic chemistry
Answer: C) Biochemistry examines chemical processes within and related to
living organisms
Rationale: Biochemistry is the study of chemical processes within and relating to
living organisms. It encompasses all life forms, not just plants or humans, and is
distinct from organic chemistry, though it heavily relies on organic chemistry
principles.
Question 4
What is the bond angle of a tetrahedral molecule?
A) 180 degrees
B) 120 degrees
C) 109.5 degrees
D) 107.5 degrees
, Answer: C) 109.5 degrees
Rationale: Tetrahedral molecules have bond angles of approximately 109.5
degrees. This geometry occurs when a central atom forms four bonds with
surrounding atoms, as seen in methane (CH₄).
Question 5
The bond angle of a trigonal planar molecule is:
A) 180 degrees
B) 120 degrees
C) 109.5 degrees
D) 107.5 degrees
Answer: B) 120 degrees
Rationale: Trigonal planar molecules have bond angles of 120 degrees. This
geometry features three bonds arranged in a flat plane around the central atom, as
seen in molecules like boron trifluoride (BF₃).
Question 6
What is the bond angle of a linear molecule?
A) 180 degrees
B) 120 degrees
C) 109.5 degrees
D) 107.5 degrees
Answer: A) 180 degrees
Rationale: Linear molecules have bond angles of 180 degrees. This geometry
occurs when two atoms are bonded to a central atom on opposite sides, creating a
straight line, as seen in carbon dioxide (CO₂).
Question 7
Comprehensive Multichoice Question Bank |
A Review of 100 Verified Multichoice
Questions with Answers & Clinical
Rationales (2026 NEW!!)
Table of Contents
Section 1: Foundations of Biochemistry (Questions 1-15)
• Scope of Biochemistry
• Organic vs Inorganic Chemistry
• Biomolecules and Macromolecules
Section 2: Chemical Bonding and Molecular Structure (Questions 16-35)
• Covalent Bonds and Valence Electrons
• Molecular Geometry and Bond Angles
• Carbon Compounds and Functional Groups
Section 3: Molecular Representations (Questions 36-45)
• Structural Formulas
• Line-Bond Drawings
• Condensed Structures
Section 4: Cellular Biology and Organization (Questions 46-70)
• Prokaryotes vs Eukaryotes
• Organelles and Their Functions
• Cellular Membranes
,Section 5: Macromolecules and Supramolecular Complexes (Questions 71-85)
• Monomers and Polymers
• Molecular Mass and Daltons
• Supramolecular Assembly
Section 6: Phylogeny and Cellular Diversity (Questions 86-100)
• Three Domains of Life
• Bacterial and Archaeal Characteristics
• Eukaryotic Cell Specialization
SECTION 1: FOUNDATIONS OF BIOCHEMISTRY
Multichoice
Question 1
Which of the following is NOT a primary area of study for biochemists?
A) The relationship between structure and function of biomolecules
B) Chemical reactions of organisms
C) Classification of organisms based on morphology
D) Communication within and among organisms
Answer: C) Classification of organisms based on morphology
Rationale: Biochemists study the relationship between structure and function of
biomolecules, chemical reactions of organisms, and communication within and
among organisms. Classification based on morphology falls under taxonomy or
systematics, not biochemistry.
Question 2
Smaller elements are favored in biological systems because they:
,A) Have more valence electrons
B) Form stable covalent bonds through significant orbital overlap
C) Are more abundant in the environment
D) Have higher atomic masses
Answer: B) Form stable covalent bonds through significant orbital overlap
Rationale: Smaller elements like carbon and hydrogen form strong, stable covalent
bonds through significant overlap of atomic orbitals, allowing them to share
electrons effectively. This stability is crucial for biological molecules.
Question 3
Which statement about biochemistry is TRUE?
A) Biochemistry only studies reactions in plants
B) Biochemistry focuses exclusively on human metabolism
C) Biochemistry examines chemical processes within and related to living
organisms
D) Biochemistry is identical to organic chemistry
Answer: C) Biochemistry examines chemical processes within and related to
living organisms
Rationale: Biochemistry is the study of chemical processes within and relating to
living organisms. It encompasses all life forms, not just plants or humans, and is
distinct from organic chemistry, though it heavily relies on organic chemistry
principles.
Question 4
What is the bond angle of a tetrahedral molecule?
A) 180 degrees
B) 120 degrees
C) 109.5 degrees
D) 107.5 degrees
, Answer: C) 109.5 degrees
Rationale: Tetrahedral molecules have bond angles of approximately 109.5
degrees. This geometry occurs when a central atom forms four bonds with
surrounding atoms, as seen in methane (CH₄).
Question 5
The bond angle of a trigonal planar molecule is:
A) 180 degrees
B) 120 degrees
C) 109.5 degrees
D) 107.5 degrees
Answer: B) 120 degrees
Rationale: Trigonal planar molecules have bond angles of 120 degrees. This
geometry features three bonds arranged in a flat plane around the central atom, as
seen in molecules like boron trifluoride (BF₃).
Question 6
What is the bond angle of a linear molecule?
A) 180 degrees
B) 120 degrees
C) 109.5 degrees
D) 107.5 degrees
Answer: A) 180 degrees
Rationale: Linear molecules have bond angles of 180 degrees. This geometry
occurs when two atoms are bonded to a central atom on opposite sides, creating a
straight line, as seen in carbon dioxide (CO₂).
Question 7
