BIOL 101 Quiz 1 V3 | BIOL 101 Principles of
Biology | Actual Q&A with Rationale (BIOL101 Quiz
1) | Liberty University
1. Which of the following describes a tentative explanation for a natural phenomenon that
can be tested?
A. Hypothesis
B. Scientific Theory
C. Control Group
D. Scientific Law
Correct Answer: A
Explanation: A hypothesis is a proposed explanation that serves as a starting point for
further investigation. It must be formulated in a way that is both testable and falsifiable to
be scientifically valid. Once a hypothesis is supported by a large body of evidence, it may
contribute to the development of a theory.
2. The process by which organisms maintain a stable internal environment is known as:
A. Homeostasis
B. Evolution
C. Metabolism
D. Adaptation
,Correct Answer: A
Explanation: Homeostasis involves the physiological processes that keep internal
conditions within narrow, life-sustaining limits. Examples include temperature regulation
and the maintenance of blood pH levels. This process is essential for the survival of all
living organisms regardless of their complexity.
3. Which subatomic particle is found in the nucleus and carries a positive charge?
A. Electron
B. Isotope
C. Neutron
D. Proton
Correct Answer: D
Explanation: Protons are positively charged particles located in the atomic nucleus. The
number of protons defines the atomic number and the identity of the element. Neutrons
share the nucleus but have no charge, while electrons orbit the nucleus in specific energy
levels.
4. What type of chemical bond involves the sharing of electron pairs between atoms?
A. Ionic Bond
B. Van der Waals forces
C. Hydrogen Bond
, D. Covalent Bond
Correct Answer: D
Explanation: Covalent bonds occur when atoms share electrons to achieve stability in
their outer shells. These bonds are common in organic molecules like carbon dioxide and
methane. They are generally stronger than ionic bonds in the aqueous environment of
biological systems.
5. Water molecules stick to other water molecules due to:
A. Cohesion
B. Adhesion
C. Ionic attraction
D. Hydrophobic interactions
Correct Answer: A
Explanation: Cohesion is the attraction between like molecules, which in water is caused
by hydrogen bonding. This property allows for surface tension and the transport of water
in plants. Adhesion, by contrast, is the attraction between water and different substances.
6. A solution with a pH of 3 is considered:
A. Acidic
B. Neutral
C. Basic
Biology | Actual Q&A with Rationale (BIOL101 Quiz
1) | Liberty University
1. Which of the following describes a tentative explanation for a natural phenomenon that
can be tested?
A. Hypothesis
B. Scientific Theory
C. Control Group
D. Scientific Law
Correct Answer: A
Explanation: A hypothesis is a proposed explanation that serves as a starting point for
further investigation. It must be formulated in a way that is both testable and falsifiable to
be scientifically valid. Once a hypothesis is supported by a large body of evidence, it may
contribute to the development of a theory.
2. The process by which organisms maintain a stable internal environment is known as:
A. Homeostasis
B. Evolution
C. Metabolism
D. Adaptation
,Correct Answer: A
Explanation: Homeostasis involves the physiological processes that keep internal
conditions within narrow, life-sustaining limits. Examples include temperature regulation
and the maintenance of blood pH levels. This process is essential for the survival of all
living organisms regardless of their complexity.
3. Which subatomic particle is found in the nucleus and carries a positive charge?
A. Electron
B. Isotope
C. Neutron
D. Proton
Correct Answer: D
Explanation: Protons are positively charged particles located in the atomic nucleus. The
number of protons defines the atomic number and the identity of the element. Neutrons
share the nucleus but have no charge, while electrons orbit the nucleus in specific energy
levels.
4. What type of chemical bond involves the sharing of electron pairs between atoms?
A. Ionic Bond
B. Van der Waals forces
C. Hydrogen Bond
, D. Covalent Bond
Correct Answer: D
Explanation: Covalent bonds occur when atoms share electrons to achieve stability in
their outer shells. These bonds are common in organic molecules like carbon dioxide and
methane. They are generally stronger than ionic bonds in the aqueous environment of
biological systems.
5. Water molecules stick to other water molecules due to:
A. Cohesion
B. Adhesion
C. Ionic attraction
D. Hydrophobic interactions
Correct Answer: A
Explanation: Cohesion is the attraction between like molecules, which in water is caused
by hydrogen bonding. This property allows for surface tension and the transport of water
in plants. Adhesion, by contrast, is the attraction between water and different substances.
6. A solution with a pH of 3 is considered:
A. Acidic
B. Neutral
C. Basic
