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Biology Multiple Choice Question Bank
5 Questions per Learning Objective
UNIT 1: ENERGY FUNDAMENTALS
Learning Objective: Define 'energy'
1. Which of the following best defines energy? A) The mass of an object
multiplied by its velocity
B) The capacity to do work or cause change
C) The measure of disorder in a system
D) The force applied over a distance Answer: B
2. Which statement about energy is correct? A) Energy can be created by living
organisms
B) Energy can be destroyed during metabolism
C) Energy exists in many forms and can be converted between them
D) Energy is only found in chemical bonds Answer: C
3. Inbiology, when we say a molecule 'has energy,' we most precisely mean:
A) It has a high temperature
B) It has the capacity to do work or drive processes
C) It is moving rapidly
D) It has a large mass Answer: B
4. Which of the following is NOT a form of energy?
A) Light
B) Heat
C) Mass
D) Chemical energy Answer: C
5. The energy stored in the bonds of glucose is best classified as:
A) Kinetic energy
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B) Thermal energy
C) Potential energy
D) Radiant energy
Answer: C
Learning Objective: Compare potential energy and kinetic energy; classify
different energy forms
6. A molecule of ATP sitting unused in a cell possesses primarily:
A) Kinetic energy
B) Thermal energy
C) Potential (chemical) energy
D) Radiant energy Answer: C
7. Which of the following is an example of kinetic energy?
A) A compressed spring
B) A book sitting on a shelf
C) Water flowing down a waterfall
D) Glucose before it is metabolized Answer: C
8. Heat is best classified as:
A) Potential energy
B) Kinetic energy (random molecular motion)
C) Chemical energy
D) Nuclear energy
Answer: B
9. An electron in a high-energy orbital compared to one in a low-energy
orbital has:
A) More kinetic energy
B) Less potential energy
C) More potential energy
D) The same amount of energy Answer: C
10. Which pairing correctly matches energy type to category?
A) Sound → potential energy
B) Chemical bonds → kinetic energy
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C) Light→ kinetic energy (electromagnetic)
D) Gravity on a stationary object → kinetic energy Answer: C
Learning Objective: Explain why cells need energy; describe types and
examples of cellular work
11. Which of the following is an example of mechanical
work performed by cells?
A) Synthesis of proteins
B) Pumping ions across a membrane
C) Muscle contraction via cytoskeletal motors
D) Emission of light by bioluminescent organisms Answer: C
12. Transport work in cells refers to: A) Moving
chromosomes during cell division
B) Moving substances across membranes against their concentration gradient
C) Synthesizing lipids for membranes
D) Generating heat to maintain body temperature
Answer: B
13. Why do cells constantly need energy? A) Cells recycle energy perfectly with
no losses
B) All cellular processes release energy as heat, which must be replenished
C) Cells store unlimited amounts of energy in their nuclei
D) Cells only need energy for reproduction Answer: B
14. Chemical work in a cell includes:
A) Flagellar rotation
B) Synthesis of macromolecules like DNA and protein
C) Generating electrical signals in neurons
D) Moving organelles along microtubules Answer: B
15. The three main categories of cellular work are:
A) Catabolic, anabolic, and thermogenic
B) Mechanical, transport, and chemical
C) Oxidative, reductive, and neutral
D) Kinetic, potential, and thermal
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Answer: B
Learning Objective: Define organisms based on energy-converting abilities
(autotroph, heterotroph, chemotroph, phototroph, photoautotroph,
chemoheterotroph)
16. A photoautotroph obtains its energy and carbon from:
A) Light and organic molecules
B) Chemical reactions and CO₂
C) Light and CO₂ (inorganic carbon)
D) Organic molecules only Answer: C
17. Humans are best described as:
A) Photoautotrophs
B) Chemolithotrophs
C) Chemoheterotrophs
D) Photoheterotrophs Answer: C
18. Which term describes organisms that obtain energy from inorganic
chemical reactions?
A) Phototroph
B) Heterotroph
C) Autotroph
D) Chemotroph (specifically chemolithotroph) Answer: D
19. An autotroph is defined as an organism that:
A) Must consume other organisms for energy
B) Can synthesize organic molecules from inorganic carbon sources
C) Uses only light as an energy source
D) Depends on chemical oxidation of organic molecules Answer: B
20. Nitrifyingbacteria that oxidize ammonia (NH₃) to obtain energy and fix
CO₂ are classified as: A) Photoautotrophs
B) Photoheterotrophs
C) Chemoheterotrophs
D) Chemoautotrophs (chemolithotrophs) Answer: D
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BIOL 215 LATEST UPDATED EXAM
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SOLUTIONS + RATIONALES
Biology Multiple Choice Question Bank
5 Questions per Learning Objective
UNIT 1: ENERGY FUNDAMENTALS
Learning Objective: Define 'energy'
1. Which of the following best defines energy? A) The mass of an object
multiplied by its velocity
B) The capacity to do work or cause change
C) The measure of disorder in a system
D) The force applied over a distance Answer: B
2. Which statement about energy is correct? A) Energy can be created by living
organisms
B) Energy can be destroyed during metabolism
C) Energy exists in many forms and can be converted between them
D) Energy is only found in chemical bonds Answer: C
3. Inbiology, when we say a molecule 'has energy,' we most precisely mean:
A) It has a high temperature
B) It has the capacity to do work or drive processes
C) It is moving rapidly
D) It has a large mass Answer: B
4. Which of the following is NOT a form of energy?
A) Light
B) Heat
C) Mass
D) Chemical energy Answer: C
5. The energy stored in the bonds of glucose is best classified as:
A) Kinetic energy
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B) Thermal energy
C) Potential energy
D) Radiant energy
Answer: C
Learning Objective: Compare potential energy and kinetic energy; classify
different energy forms
6. A molecule of ATP sitting unused in a cell possesses primarily:
A) Kinetic energy
B) Thermal energy
C) Potential (chemical) energy
D) Radiant energy Answer: C
7. Which of the following is an example of kinetic energy?
A) A compressed spring
B) A book sitting on a shelf
C) Water flowing down a waterfall
D) Glucose before it is metabolized Answer: C
8. Heat is best classified as:
A) Potential energy
B) Kinetic energy (random molecular motion)
C) Chemical energy
D) Nuclear energy
Answer: B
9. An electron in a high-energy orbital compared to one in a low-energy
orbital has:
A) More kinetic energy
B) Less potential energy
C) More potential energy
D) The same amount of energy Answer: C
10. Which pairing correctly matches energy type to category?
A) Sound → potential energy
B) Chemical bonds → kinetic energy
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C) Light→ kinetic energy (electromagnetic)
D) Gravity on a stationary object → kinetic energy Answer: C
Learning Objective: Explain why cells need energy; describe types and
examples of cellular work
11. Which of the following is an example of mechanical
work performed by cells?
A) Synthesis of proteins
B) Pumping ions across a membrane
C) Muscle contraction via cytoskeletal motors
D) Emission of light by bioluminescent organisms Answer: C
12. Transport work in cells refers to: A) Moving
chromosomes during cell division
B) Moving substances across membranes against their concentration gradient
C) Synthesizing lipids for membranes
D) Generating heat to maintain body temperature
Answer: B
13. Why do cells constantly need energy? A) Cells recycle energy perfectly with
no losses
B) All cellular processes release energy as heat, which must be replenished
C) Cells store unlimited amounts of energy in their nuclei
D) Cells only need energy for reproduction Answer: B
14. Chemical work in a cell includes:
A) Flagellar rotation
B) Synthesis of macromolecules like DNA and protein
C) Generating electrical signals in neurons
D) Moving organelles along microtubules Answer: B
15. The three main categories of cellular work are:
A) Catabolic, anabolic, and thermogenic
B) Mechanical, transport, and chemical
C) Oxidative, reductive, and neutral
D) Kinetic, potential, and thermal
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Answer: B
Learning Objective: Define organisms based on energy-converting abilities
(autotroph, heterotroph, chemotroph, phototroph, photoautotroph,
chemoheterotroph)
16. A photoautotroph obtains its energy and carbon from:
A) Light and organic molecules
B) Chemical reactions and CO₂
C) Light and CO₂ (inorganic carbon)
D) Organic molecules only Answer: C
17. Humans are best described as:
A) Photoautotrophs
B) Chemolithotrophs
C) Chemoheterotrophs
D) Photoheterotrophs Answer: C
18. Which term describes organisms that obtain energy from inorganic
chemical reactions?
A) Phototroph
B) Heterotroph
C) Autotroph
D) Chemotroph (specifically chemolithotroph) Answer: D
19. An autotroph is defined as an organism that:
A) Must consume other organisms for energy
B) Can synthesize organic molecules from inorganic carbon sources
C) Uses only light as an energy source
D) Depends on chemical oxidation of organic molecules Answer: B
20. Nitrifyingbacteria that oxidize ammonia (NH₃) to obtain energy and fix
CO₂ are classified as: A) Photoautotrophs
B) Photoheterotrophs
C) Chemoheterotrophs
D) Chemoautotrophs (chemolithotrophs) Answer: D
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