BSC 101 Exam 1 Foundation Biology: Practice
Questions & 100% Solved Answers 2 versions
This targeted academic preparation guide delivers comprehensive practice questions,
verified answers, and detailed rationales designed specifically for Exam 1 of the
foundational BSC 101 curriculum. It covers early-semester introductory biological
principles, including macromolecule structures, cellular anatomy, cell membrane
transport dynamics, and the laws of bioenergetics. Undergraduate life science and pre-
professional health students will master basic biochemical formulas and cellular
taxonomy rules to ensure an optimal grade on their first proctored milestone
assessment.
1. Which of the following is NOT a characteristic shared by all living organisms?
A) Ability to reproduce
B) Ability to photosynthesize
C) Ability to respond to stimuli
D) Ability to maintain homeostasis
Rationale: Photosynthesis is not a universal characteristic of life; many organisms (e.g.,
animals, fungi) do not perform photosynthesis, but all living things reproduce, respond to
stimuli, and maintain homeostasis.
2. In the scientific method, a hypothesis is best defined as:
A) A proven fact
B) A testable explanation for an observation
C) A random guess
D) A final conclusion
Rationale: A hypothesis is a tentative, testable explanation that can be supported or
refuted by experimentation.
,3. Which of the following is an example of a controlled variable in an experiment?
A) The variable being manipulated
B) A factor kept constant across all groups
C) The variable being measured
D) The group receiving no treatment
Rationale: Controlled variables are kept constant to ensure that only the independent
variable affects the dependent variable.
4. The atomic number of an element is determined by the number of:
A) Neutrons
B) Protons
C) Electrons
D) Nucleons
Rationale: The atomic number equals the number of protons in the nucleus, which defines
the element.
5. Which type of bond involves the sharing of electrons between atoms?
A) Ionic bond
B) Covalent bond
C) Hydrogen bond
D) Van der Waals interaction
Rationale: Covalent bonds form when atoms share electrons to achieve stable electron
configurations.
6. Water is essential for life because it:
A) Is a nonpolar molecule
B) Is a versatile solvent due to its polarity
C) Has a low specific heat
D) Cannot form hydrogen bonds
,Rationale: Water's polarity allows it to dissolve many substances, making it an excellent
solvent for biological reactions.
7. Which of the following is a monosaccharide?
A) Sucrose
B) Glucose
C) Lactose
D) Maltose
Rationale: Glucose is a monosaccharide; sucrose, lactose, and maltose are disaccharides.
8. The primary function of carbohydrates in cells is:
A) Long-term energy storage
B) Short-term energy storage and structural support
C) Catalyzing reactions
D) Storing genetic information
Rationale: Carbohydrates provide quick energy and serve as structural components (e.g.,
cellulose in plants).
9. Which macromolecule is composed of amino acids?
A) Carbohydrates
B) Lipids
C) Proteins
D) Nucleic acids
Rationale: Proteins are polymers of amino acids linked by peptide bonds.
, 10. The function of DNA is to:
A) Catalyze metabolic reactions
B) Store and transmit genetic information
C) Transport oxygen
D) Provide structural support
Rationale: DNA contains the genetic instructions for the development and functioning of
living organisms.
11. Which of the following is a function of the plasma membrane?
A) Synthesizing proteins
B) Regulating the movement of substances into and out of the cell
C) Producing ATP
D) Storing genetic material
Rationale: The plasma membrane is selectively permeable and controls what enters and
exits the cell.
12. The fluid mosaic model describes the plasma membrane as:
A) A rigid, static structure
B) A dynamic structure with proteins embedded in a phospholipid bilayer
C) A single layer of phospholipids
D) A solid layer of proteins
Rationale: The fluid mosaic model describes the membrane as a fluid phospholipid bilayer
with embedded proteins that can move laterally.
13. Which organelle is responsible for ATP production?
A) Nucleus
B) Ribosome
C) Mitochondrion
D) Golgi apparatus
Questions & 100% Solved Answers 2 versions
This targeted academic preparation guide delivers comprehensive practice questions,
verified answers, and detailed rationales designed specifically for Exam 1 of the
foundational BSC 101 curriculum. It covers early-semester introductory biological
principles, including macromolecule structures, cellular anatomy, cell membrane
transport dynamics, and the laws of bioenergetics. Undergraduate life science and pre-
professional health students will master basic biochemical formulas and cellular
taxonomy rules to ensure an optimal grade on their first proctored milestone
assessment.
1. Which of the following is NOT a characteristic shared by all living organisms?
A) Ability to reproduce
B) Ability to photosynthesize
C) Ability to respond to stimuli
D) Ability to maintain homeostasis
Rationale: Photosynthesis is not a universal characteristic of life; many organisms (e.g.,
animals, fungi) do not perform photosynthesis, but all living things reproduce, respond to
stimuli, and maintain homeostasis.
2. In the scientific method, a hypothesis is best defined as:
A) A proven fact
B) A testable explanation for an observation
C) A random guess
D) A final conclusion
Rationale: A hypothesis is a tentative, testable explanation that can be supported or
refuted by experimentation.
,3. Which of the following is an example of a controlled variable in an experiment?
A) The variable being manipulated
B) A factor kept constant across all groups
C) The variable being measured
D) The group receiving no treatment
Rationale: Controlled variables are kept constant to ensure that only the independent
variable affects the dependent variable.
4. The atomic number of an element is determined by the number of:
A) Neutrons
B) Protons
C) Electrons
D) Nucleons
Rationale: The atomic number equals the number of protons in the nucleus, which defines
the element.
5. Which type of bond involves the sharing of electrons between atoms?
A) Ionic bond
B) Covalent bond
C) Hydrogen bond
D) Van der Waals interaction
Rationale: Covalent bonds form when atoms share electrons to achieve stable electron
configurations.
6. Water is essential for life because it:
A) Is a nonpolar molecule
B) Is a versatile solvent due to its polarity
C) Has a low specific heat
D) Cannot form hydrogen bonds
,Rationale: Water's polarity allows it to dissolve many substances, making it an excellent
solvent for biological reactions.
7. Which of the following is a monosaccharide?
A) Sucrose
B) Glucose
C) Lactose
D) Maltose
Rationale: Glucose is a monosaccharide; sucrose, lactose, and maltose are disaccharides.
8. The primary function of carbohydrates in cells is:
A) Long-term energy storage
B) Short-term energy storage and structural support
C) Catalyzing reactions
D) Storing genetic information
Rationale: Carbohydrates provide quick energy and serve as structural components (e.g.,
cellulose in plants).
9. Which macromolecule is composed of amino acids?
A) Carbohydrates
B) Lipids
C) Proteins
D) Nucleic acids
Rationale: Proteins are polymers of amino acids linked by peptide bonds.
, 10. The function of DNA is to:
A) Catalyze metabolic reactions
B) Store and transmit genetic information
C) Transport oxygen
D) Provide structural support
Rationale: DNA contains the genetic instructions for the development and functioning of
living organisms.
11. Which of the following is a function of the plasma membrane?
A) Synthesizing proteins
B) Regulating the movement of substances into and out of the cell
C) Producing ATP
D) Storing genetic material
Rationale: The plasma membrane is selectively permeable and controls what enters and
exits the cell.
12. The fluid mosaic model describes the plasma membrane as:
A) A rigid, static structure
B) A dynamic structure with proteins embedded in a phospholipid bilayer
C) A single layer of phospholipids
D) A solid layer of proteins
Rationale: The fluid mosaic model describes the membrane as a fluid phospholipid bilayer
with embedded proteins that can move laterally.
13. Which organelle is responsible for ATP production?
A) Nucleus
B) Ribosome
C) Mitochondrion
D) Golgi apparatus
