BIO 171 EXAM 100 ACTUAL QUESTIONS AND
CORRECT ANSWERS WITH RATIONALE –
COMPREHENSIVE QUESTIONS AND ANSWERS |
VERIFIED AND WELL-DETAILED ANSWERS |
DETAILED EXPLANATIONS AND RATIONALES |
COMPLETE EXAM PREPARATION STUDY GUIDE |
PRACTICE QUESTIONS | LATEST EXAM UPDATE
.
BIO 171 EXAM — SECTION ONE
•
CORE DOMAINS
• Scientific method, experimental design, and biological principles
• Chemistry of life and biological macromolecules
• Cell structure, organization, and function
• Membrane structure and cellular transport
• Enzymes, metabolism, and energy transformations
• Cellular respiration and photosynthesis
• DNA structure, replication, transcription, and translation
• Cell division, genetics, and inheritance
• Evolution, ecology, and biological diversity
•
INTRODUCTION
This comprehensive BIO 171 preparation assessment is designed to reinforce foundational
biological knowledge and develop the ability to apply biological principles to unfamiliar
situations. The questions use multiple-choice formats to assess terminology, mechanisms,
relationships, experimental interpretation, and problem-solving. Particular emphasis is
placed on understanding why biological processes occur rather than relying solely on
memorization. Questions range from foundational recall to application and analysis, helping
learners distinguish closely related concepts and recognize biological cause-and-effect
relationships. The explanations following each answer provide concise reasoning that can be
used for focused review and examination preparation.
,SECTION ONE: QUESTIONS 1–100
Question 1. Which characteristic is shared by all organisms considered living?
A. Ability to perform photosynthesis
B. Presence of DNA or another hereditary material
C. Ability to move from place to place
D. Presence of a cell wall
Correct Answer: B. Presence of DNA or another hereditary material
Explanation: Living systems possess hereditary information that can be transmitted to
subsequent generations. Photosynthesis, locomotion, and cell walls are not universal
characteristics of all living organisms.
Question 2. Which statement best describes a scientific hypothesis?
A. A proven explanation that can no longer be tested
B. A testable proposed explanation for an observation
C. A collection of unrelated observations
D. A statement that must always be accepted as true
Correct Answer: B. A testable proposed explanation for an observation
Explanation: A hypothesis is a proposed explanation that generates predictions that can be
tested through observation or experimentation.
Question 3. A researcher changes the amount of fertilizer supplied to plants and measures
their growth. What is the independent variable?
A. Plant growth
B. Plant species
C. Amount of fertilizer
D. Number of leaves at the end of the experiment
Correct Answer: C. Amount of fertilizer
Explanation: The independent variable is the factor deliberately manipulated by the
researcher. Plant growth is the dependent variable because it is measured in response to the
fertilizer.
Question 4. What is the primary purpose of a control group?
A. To receive every experimental treatment
B. To provide a comparison for evaluating the experimental treatment
C. To guarantee that the hypothesis is correct
D. To eliminate all biological variation
Correct Answer: B. To provide a comparison for evaluating the experimental treatment
, Explanation: A control provides a baseline against which experimental results can be
compared, helping determine whether observed effects are associated with the
manipulated variable.
Question 5. Which level of biological organization comes immediately after the cellular
level?
A. Tissue
B. Organ
C. Organ system
D. Organism
Correct Answer: A. Tissue
Explanation: Cells with related functions can form tissues. Tissues combine to form organs,
organs form organ systems, and organ systems contribute to the organism.
Question 6. Which subatomic particle determines the atomic number of an element?
A. Electron
B. Neutron
C. Proton
D. Isotope
Correct Answer: C. Proton
Explanation: The atomic number equals the number of protons in an atom's nucleus.
Changing the number of protons changes the identity of the element.
Question 7. An atom has six protons and six neutrons. What is its mass number?
A. 6
B. 12
C. 18
D. 36
Correct Answer: B. 12
Explanation: Mass number equals protons plus neutrons. Six protons plus six neutrons gives
a mass number of 12.
Question 8. Which type of bond involves the transfer of electrons from one atom to
another?
A. Hydrogen bond
B. Peptide bond
C. Ionic bond
D. Nonpolar covalent bond
CORRECT ANSWERS WITH RATIONALE –
COMPREHENSIVE QUESTIONS AND ANSWERS |
VERIFIED AND WELL-DETAILED ANSWERS |
DETAILED EXPLANATIONS AND RATIONALES |
COMPLETE EXAM PREPARATION STUDY GUIDE |
PRACTICE QUESTIONS | LATEST EXAM UPDATE
.
BIO 171 EXAM — SECTION ONE
•
CORE DOMAINS
• Scientific method, experimental design, and biological principles
• Chemistry of life and biological macromolecules
• Cell structure, organization, and function
• Membrane structure and cellular transport
• Enzymes, metabolism, and energy transformations
• Cellular respiration and photosynthesis
• DNA structure, replication, transcription, and translation
• Cell division, genetics, and inheritance
• Evolution, ecology, and biological diversity
•
INTRODUCTION
This comprehensive BIO 171 preparation assessment is designed to reinforce foundational
biological knowledge and develop the ability to apply biological principles to unfamiliar
situations. The questions use multiple-choice formats to assess terminology, mechanisms,
relationships, experimental interpretation, and problem-solving. Particular emphasis is
placed on understanding why biological processes occur rather than relying solely on
memorization. Questions range from foundational recall to application and analysis, helping
learners distinguish closely related concepts and recognize biological cause-and-effect
relationships. The explanations following each answer provide concise reasoning that can be
used for focused review and examination preparation.
,SECTION ONE: QUESTIONS 1–100
Question 1. Which characteristic is shared by all organisms considered living?
A. Ability to perform photosynthesis
B. Presence of DNA or another hereditary material
C. Ability to move from place to place
D. Presence of a cell wall
Correct Answer: B. Presence of DNA or another hereditary material
Explanation: Living systems possess hereditary information that can be transmitted to
subsequent generations. Photosynthesis, locomotion, and cell walls are not universal
characteristics of all living organisms.
Question 2. Which statement best describes a scientific hypothesis?
A. A proven explanation that can no longer be tested
B. A testable proposed explanation for an observation
C. A collection of unrelated observations
D. A statement that must always be accepted as true
Correct Answer: B. A testable proposed explanation for an observation
Explanation: A hypothesis is a proposed explanation that generates predictions that can be
tested through observation or experimentation.
Question 3. A researcher changes the amount of fertilizer supplied to plants and measures
their growth. What is the independent variable?
A. Plant growth
B. Plant species
C. Amount of fertilizer
D. Number of leaves at the end of the experiment
Correct Answer: C. Amount of fertilizer
Explanation: The independent variable is the factor deliberately manipulated by the
researcher. Plant growth is the dependent variable because it is measured in response to the
fertilizer.
Question 4. What is the primary purpose of a control group?
A. To receive every experimental treatment
B. To provide a comparison for evaluating the experimental treatment
C. To guarantee that the hypothesis is correct
D. To eliminate all biological variation
Correct Answer: B. To provide a comparison for evaluating the experimental treatment
, Explanation: A control provides a baseline against which experimental results can be
compared, helping determine whether observed effects are associated with the
manipulated variable.
Question 5. Which level of biological organization comes immediately after the cellular
level?
A. Tissue
B. Organ
C. Organ system
D. Organism
Correct Answer: A. Tissue
Explanation: Cells with related functions can form tissues. Tissues combine to form organs,
organs form organ systems, and organ systems contribute to the organism.
Question 6. Which subatomic particle determines the atomic number of an element?
A. Electron
B. Neutron
C. Proton
D. Isotope
Correct Answer: C. Proton
Explanation: The atomic number equals the number of protons in an atom's nucleus.
Changing the number of protons changes the identity of the element.
Question 7. An atom has six protons and six neutrons. What is its mass number?
A. 6
B. 12
C. 18
D. 36
Correct Answer: B. 12
Explanation: Mass number equals protons plus neutrons. Six protons plus six neutrons gives
a mass number of 12.
Question 8. Which type of bond involves the transfer of electrons from one atom to
another?
A. Hydrogen bond
B. Peptide bond
C. Ionic bond
D. Nonpolar covalent bond
