UMN BIOL 1009 MIDTERM (GIBSON) EXAM – QUESTIONS AND ANSWERS |
VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES |DOWNLOAD
AND PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
Foundations of Chemistry of Life
Cell Structure and Function
Energy Recruitment and Utilization
Cellular Reproduction and Genetics
Principles of Inheritance and Genetic Information Flow
Mechanisms of Evolution
Biological Diversity and Ecology
Scientific Ethics and Regulatory Compliance
Introduction
This comprehensive examination assesses foundational knowledge in general biology
for non-majors, covering molecular structure, cellular processes, genetic principles,
evolutionary mechanisms, and ecological interactions. The exam evaluates students'
ability to apply biological concepts to real-world scenarios, interpret experimental
data, and demonstrate critical thinking in scientific decision-making. Questions
emphasize practical application of theory, ethical considerations in biological
research, and the interconnectedness of biological systems. Multiple-choice and
scenario-based formats are employed to measure both content mastery and
analytical reasoning skills essential for future coursework and professional
development in the biological sciences.
SECTION ONE: QUESTIONS 1–50
,Question 1
Which subatomic particle carries a negative charge and orbits the nucleus of an
atom?
A. Proton
B. Neutron
C. Electron
D. Ion
🟢 Correct Answer: C. Electron
🔴 Explanation: Electrons are negatively charged subatomic particles that occupy
orbitals around the atomic nucleus. Protons are positively charged and reside in
the nucleus, while neutrons are neutral particles also located in the nucleus.
Question 2
Which type of chemical bond involves the sharing of electron pairs between
atoms?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Van der Waals interaction
🟢 Correct Answer: B. Covalent bond
🔴 Explanation: Covalent bonds form when atoms share electron pairs to achieve
stable electron configurations. Ionic bonds involve electron transfer, hydrogen
,bonds are weak attractions between polar molecules, and Van der Waals forces are
transient dipole interactions.
Question 3
What property of water allows it to dissolve many polar substances?
A. High heat capacity
B. Polarity
C. Low density as a solid
D. Cohesion
🟢 Correct Answer: B. Polarity
🔴 Explanation: Water's polar nature, arising from uneven electron distribution,
enables it to form hydrogen bonds with other polar molecules and ions, making it
an excellent solvent for hydrophilic substances.
Question 4
Which macromolecule category includes enzymes that catalyze biochemical
reactions?
A. Carbohydrates
B. Lipids
C. Proteins
D. Nucleic acids
🟢 Correct Answer: C. Proteins
🔴 Explanation: Proteins function as enzymes that lower activation energy for
biochemical reactions. Carbohydrates serve as energy sources and structural
, components, lipids store energy and form membranes, and nucleic acids store
genetic information.
Question 5
What is the primary function of carbohydrates in living organisms?
A. Catalyzing metabolic reactions
B. Storing genetic information
C. Providing quick energy and structural support
D. Forming cell membranes
🟢 Correct Answer: C. Providing quick energy and structural support
🔴 Explanation: Carbohydrates serve as immediate energy sources through
glucose metabolism and provide structural support in organisms like plants
(cellulose) and arthropods (chitin).
Question 6
Which functional group is characteristic of amino acids and gives them basic
properties?
A. Carboxyl group
B. Amino group
C. Hydroxyl group
D. Phosphate group
🟢 Correct Answer: B. Amino group
🔴 Explanation: The amino group (-NH₂) accepts protons, giving amino acids their
basic character. The carboxyl group (-COOH) is acidic, hydroxyl groups are found in
VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES |DOWNLOAD
AND PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
Foundations of Chemistry of Life
Cell Structure and Function
Energy Recruitment and Utilization
Cellular Reproduction and Genetics
Principles of Inheritance and Genetic Information Flow
Mechanisms of Evolution
Biological Diversity and Ecology
Scientific Ethics and Regulatory Compliance
Introduction
This comprehensive examination assesses foundational knowledge in general biology
for non-majors, covering molecular structure, cellular processes, genetic principles,
evolutionary mechanisms, and ecological interactions. The exam evaluates students'
ability to apply biological concepts to real-world scenarios, interpret experimental
data, and demonstrate critical thinking in scientific decision-making. Questions
emphasize practical application of theory, ethical considerations in biological
research, and the interconnectedness of biological systems. Multiple-choice and
scenario-based formats are employed to measure both content mastery and
analytical reasoning skills essential for future coursework and professional
development in the biological sciences.
SECTION ONE: QUESTIONS 1–50
,Question 1
Which subatomic particle carries a negative charge and orbits the nucleus of an
atom?
A. Proton
B. Neutron
C. Electron
D. Ion
🟢 Correct Answer: C. Electron
🔴 Explanation: Electrons are negatively charged subatomic particles that occupy
orbitals around the atomic nucleus. Protons are positively charged and reside in
the nucleus, while neutrons are neutral particles also located in the nucleus.
Question 2
Which type of chemical bond involves the sharing of electron pairs between
atoms?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Van der Waals interaction
🟢 Correct Answer: B. Covalent bond
🔴 Explanation: Covalent bonds form when atoms share electron pairs to achieve
stable electron configurations. Ionic bonds involve electron transfer, hydrogen
,bonds are weak attractions between polar molecules, and Van der Waals forces are
transient dipole interactions.
Question 3
What property of water allows it to dissolve many polar substances?
A. High heat capacity
B. Polarity
C. Low density as a solid
D. Cohesion
🟢 Correct Answer: B. Polarity
🔴 Explanation: Water's polar nature, arising from uneven electron distribution,
enables it to form hydrogen bonds with other polar molecules and ions, making it
an excellent solvent for hydrophilic substances.
Question 4
Which macromolecule category includes enzymes that catalyze biochemical
reactions?
A. Carbohydrates
B. Lipids
C. Proteins
D. Nucleic acids
🟢 Correct Answer: C. Proteins
🔴 Explanation: Proteins function as enzymes that lower activation energy for
biochemical reactions. Carbohydrates serve as energy sources and structural
, components, lipids store energy and form membranes, and nucleic acids store
genetic information.
Question 5
What is the primary function of carbohydrates in living organisms?
A. Catalyzing metabolic reactions
B. Storing genetic information
C. Providing quick energy and structural support
D. Forming cell membranes
🟢 Correct Answer: C. Providing quick energy and structural support
🔴 Explanation: Carbohydrates serve as immediate energy sources through
glucose metabolism and provide structural support in organisms like plants
(cellulose) and arthropods (chitin).
Question 6
Which functional group is characteristic of amino acids and gives them basic
properties?
A. Carboxyl group
B. Amino group
C. Hydroxyl group
D. Phosphate group
🟢 Correct Answer: B. Amino group
🔴 Explanation: The amino group (-NH₂) accepts protons, giving amino acids their
basic character. The carboxyl group (-COOH) is acidic, hydroxyl groups are found in
