BSC 101 Exam 1 Foundation Biology: Practice
Questions & 100% Solved Answers 3 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 level of biological organization is immediately below the organ level?
A) Cell
B) Tissue
C) Organelle
D) Organism
Rationale: The biological hierarchy is atom → molecule → organelle → cell → tissue →
organ → organ system → organism, so tissue is immediately below organ.
2. Emergent properties in biology are best described as:
A) Properties that disappear as organization increases
B) New properties that arise at each level of organization
C) Properties found only in nonliving things
D) Properties that are random and unpredictable
Rationale: Emergent properties result from the arrangement and interaction of parts as
complexity increases.
,3. Isotopes of an element differ in the number of:
A) Protons
B) Electrons
C) Neutrons
D) Bonds
Rationale: Isotopes have the same number of protons but different numbers of neutrons.
4. The number of electrons in an atom's outermost shell determines its:
A) Atomic mass
B) Chemical reactivity
C) Number of neutrons
D) Radioactivity
Rationale: Valence electrons in the outermost shell determine how an atom bonds and
reacts chemically.
5. Hydrogen bonds are important in biology because they:
A) Are stronger than covalent bonds
B) Form between polar molecules and help stabilize structures
C) Require ATP to form
D) Only occur in gases
Rationale: Hydrogen bonds are weak individually but collectively stabilize water, DNA, and
proteins.
6. A solution with a pH of 3 is:
A) Neutral
B) Acidic
C) Basic
D) Alkaline
,Rationale: pH below 7 is acidic; pH 3 is strongly acidic.
7. Buffers are important in living systems because they:
A) Increase temperature
B) Resist changes in pH
C) Break down proteins
D) Produce ATP
Rationale: Buffers minimize pH changes by accepting or donating hydrogen ions.
8. Dehydration synthesis reactions:
A) Break polymers into monomers using water
B) Join monomers into polymers by removing water
C) Produce ATP
D) Occur only in lipids
Rationale: Dehydration synthesis removes a water molecule to form a covalent bond
between monomers.
9. Hydrolysis reactions:
A) Break polymers into monomers by adding water
B) Join monomers into polymers
C) Remove water from molecules
D) Produce glucose
Rationale: Hydrolysis uses water to break bonds between monomers in polymers.
10. Which macromolecule is primarily used for long-term energy storage?
A) Carbohydrates
, B) Proteins
C) Lipids
D) Nucleic acids
Rationale: Lipids, especially triglycerides, store more energy per gram and are used for
long-term storage.
11. Saturated fatty acids differ from unsaturated fatty acids because saturated
fatty acids:
A) Have double bonds between carbons
B) Have no double bonds between carbons
C) Are liquid at room temperature
D) Are found only in plants
Rationale: Saturated fatty acids have no carbon-carbon double bonds and are typically
solid at room temperature.
12. Phospholipids are amphipathic, meaning they:
A) Dissolve completely in water
B) Have both hydrophilic and hydrophobic regions
C) Repel all water
D) Are found only in prokaryotes
Rationale: Phospholipids have a hydrophilic phosphate head and hydrophobic fatty acid
tails.
13. Steroids are lipids characterized by:
A) Four fused carbon rings
B) Long unbranched fatty acid chains
C) Phosphate groups
D) Amino acid chains
Questions & 100% Solved Answers 3 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 level of biological organization is immediately below the organ level?
A) Cell
B) Tissue
C) Organelle
D) Organism
Rationale: The biological hierarchy is atom → molecule → organelle → cell → tissue →
organ → organ system → organism, so tissue is immediately below organ.
2. Emergent properties in biology are best described as:
A) Properties that disappear as organization increases
B) New properties that arise at each level of organization
C) Properties found only in nonliving things
D) Properties that are random and unpredictable
Rationale: Emergent properties result from the arrangement and interaction of parts as
complexity increases.
,3. Isotopes of an element differ in the number of:
A) Protons
B) Electrons
C) Neutrons
D) Bonds
Rationale: Isotopes have the same number of protons but different numbers of neutrons.
4. The number of electrons in an atom's outermost shell determines its:
A) Atomic mass
B) Chemical reactivity
C) Number of neutrons
D) Radioactivity
Rationale: Valence electrons in the outermost shell determine how an atom bonds and
reacts chemically.
5. Hydrogen bonds are important in biology because they:
A) Are stronger than covalent bonds
B) Form between polar molecules and help stabilize structures
C) Require ATP to form
D) Only occur in gases
Rationale: Hydrogen bonds are weak individually but collectively stabilize water, DNA, and
proteins.
6. A solution with a pH of 3 is:
A) Neutral
B) Acidic
C) Basic
D) Alkaline
,Rationale: pH below 7 is acidic; pH 3 is strongly acidic.
7. Buffers are important in living systems because they:
A) Increase temperature
B) Resist changes in pH
C) Break down proteins
D) Produce ATP
Rationale: Buffers minimize pH changes by accepting or donating hydrogen ions.
8. Dehydration synthesis reactions:
A) Break polymers into monomers using water
B) Join monomers into polymers by removing water
C) Produce ATP
D) Occur only in lipids
Rationale: Dehydration synthesis removes a water molecule to form a covalent bond
between monomers.
9. Hydrolysis reactions:
A) Break polymers into monomers by adding water
B) Join monomers into polymers
C) Remove water from molecules
D) Produce glucose
Rationale: Hydrolysis uses water to break bonds between monomers in polymers.
10. Which macromolecule is primarily used for long-term energy storage?
A) Carbohydrates
, B) Proteins
C) Lipids
D) Nucleic acids
Rationale: Lipids, especially triglycerides, store more energy per gram and are used for
long-term storage.
11. Saturated fatty acids differ from unsaturated fatty acids because saturated
fatty acids:
A) Have double bonds between carbons
B) Have no double bonds between carbons
C) Are liquid at room temperature
D) Are found only in plants
Rationale: Saturated fatty acids have no carbon-carbon double bonds and are typically
solid at room temperature.
12. Phospholipids are amphipathic, meaning they:
A) Dissolve completely in water
B) Have both hydrophilic and hydrophobic regions
C) Repel all water
D) Are found only in prokaryotes
Rationale: Phospholipids have a hydrophilic phosphate head and hydrophobic fatty acid
tails.
13. Steroids are lipids characterized by:
A) Four fused carbon rings
B) Long unbranched fatty acid chains
C) Phosphate groups
D) Amino acid chains
