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Test Bank for Biological Science 7th Edition 2026-2027 BANK
QUESTIONS WITH DETAILED VERIFIED ANSWERS EXAM
QUESTIONS WILL COME FROM HERE (100% CORRECT
ANSWERS A+ GRADED
1. Which of the following is a fundamental characteristic of all living
organisms?
A) Ability to photosynthesize
B) Multicellularity
C) Response to stimuli
D) Presence of a nucleus
Answer: C
Explanation: All living organisms respond to stimuli in their
environment. Photosynthesis is limited to certain autotrophs,
multicellularity excludes unicellular organisms, and a nucleus is absent
in prokaryotes.
2. The theory of evolution by natural selection was independently
proposed by Charles Darwin and:
A) Gregor Mendel
B) Alfred Russel Wallace
C) Jean-Baptiste Lamarck
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D) Thomas Malthus
Answer: B
Explanation: Alfred Russel Wallace independently conceived the theory
of natural selection, prompting Darwin to publish his own work.
Mendel focused on genetics, Lamarck on inheritance of acquired
characteristics, and Malthus on population growth.
3. An atom's identity as a specific element is determined by its number
of:
A) Electrons
B) Neutrons
C) Protons
D) Isotopes
Answer: C
Explanation: The atomic number, which defines an element, is the
number of protons in the nucleus. Electron numbers can vary in ions,
neutrons in isotopes, and isotopes are variants of an element.
4. A covalent bond in which electrons are shared unequally is described
as:
A) Ionic
B) Polar
C) Nonpolar
D) Hydrogen
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Answer: B
Explanation: A polar covalent bond results from unequal sharing of
electrons between atoms with different electronegativities. Ionic bonds
involve electron transfer, nonpolar bonds involve equal sharing, and
hydrogen bonds are weak intermolecular attractions.
5. Water's high specific heat is primarily a consequence of:
A) Its low molecular mass
B) Hydrogen bonding
C) Its polar covalent bonds
D) Its neutral pH
Answer: B
Explanation: Extensive hydrogen bonding between water molecules
requires significant energy input to increase kinetic energy and thus
temperature. The polar covalent bonds enable hydrogen bonding but
the H-bonds themselves are the direct cause of the high specific heat.
6. Which functional group is basic and can accept a proton in aqueous
solution?
A) Carboxyl
B) Hydroxyl
C) Amino
D) Sulfhydryl
Answer: C
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Explanation: The amino group (-NH2) can accept a proton to become -
NH3+, raising the pH of a solution. The carboxyl group donates protons,
the hydroxyl group is polar but not typically basic, and the sulfhydryl
group is weakly polar.
7. The polymerization of monomers into macromolecules generally
occurs via:
A) Hydrolysis reactions
B) Dehydration synthesis reactions
C) Ionic bonding
D) Peptide bonding
Answer: B
Explanation: Dehydration synthesis (condensation) reactions link
monomers by removing a water molecule. Hydrolysis breaks polymers,
ionic bonds are not the primary linkage, and peptide bonds are specific
to proteins.
8. Which of the following is not a correct monomer-polymer pairing?
A) Amino acid - Protein
B) Nucleotide - Nucleic acid
C) Monosaccharide - Lipid
D) All of the above are correct
Answer: C
Test Bank for Biological Science 7th Edition 2026-2027 BANK
QUESTIONS WITH DETAILED VERIFIED ANSWERS EXAM
QUESTIONS WILL COME FROM HERE (100% CORRECT
ANSWERS A+ GRADED
1. Which of the following is a fundamental characteristic of all living
organisms?
A) Ability to photosynthesize
B) Multicellularity
C) Response to stimuli
D) Presence of a nucleus
Answer: C
Explanation: All living organisms respond to stimuli in their
environment. Photosynthesis is limited to certain autotrophs,
multicellularity excludes unicellular organisms, and a nucleus is absent
in prokaryotes.
2. The theory of evolution by natural selection was independently
proposed by Charles Darwin and:
A) Gregor Mendel
B) Alfred Russel Wallace
C) Jean-Baptiste Lamarck
,2|Page
D) Thomas Malthus
Answer: B
Explanation: Alfred Russel Wallace independently conceived the theory
of natural selection, prompting Darwin to publish his own work.
Mendel focused on genetics, Lamarck on inheritance of acquired
characteristics, and Malthus on population growth.
3. An atom's identity as a specific element is determined by its number
of:
A) Electrons
B) Neutrons
C) Protons
D) Isotopes
Answer: C
Explanation: The atomic number, which defines an element, is the
number of protons in the nucleus. Electron numbers can vary in ions,
neutrons in isotopes, and isotopes are variants of an element.
4. A covalent bond in which electrons are shared unequally is described
as:
A) Ionic
B) Polar
C) Nonpolar
D) Hydrogen
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Answer: B
Explanation: A polar covalent bond results from unequal sharing of
electrons between atoms with different electronegativities. Ionic bonds
involve electron transfer, nonpolar bonds involve equal sharing, and
hydrogen bonds are weak intermolecular attractions.
5. Water's high specific heat is primarily a consequence of:
A) Its low molecular mass
B) Hydrogen bonding
C) Its polar covalent bonds
D) Its neutral pH
Answer: B
Explanation: Extensive hydrogen bonding between water molecules
requires significant energy input to increase kinetic energy and thus
temperature. The polar covalent bonds enable hydrogen bonding but
the H-bonds themselves are the direct cause of the high specific heat.
6. Which functional group is basic and can accept a proton in aqueous
solution?
A) Carboxyl
B) Hydroxyl
C) Amino
D) Sulfhydryl
Answer: C
, 4|Page
Explanation: The amino group (-NH2) can accept a proton to become -
NH3+, raising the pH of a solution. The carboxyl group donates protons,
the hydroxyl group is polar but not typically basic, and the sulfhydryl
group is weakly polar.
7. The polymerization of monomers into macromolecules generally
occurs via:
A) Hydrolysis reactions
B) Dehydration synthesis reactions
C) Ionic bonding
D) Peptide bonding
Answer: B
Explanation: Dehydration synthesis (condensation) reactions link
monomers by removing a water molecule. Hydrolysis breaks polymers,
ionic bonds are not the primary linkage, and peptide bonds are specific
to proteins.
8. Which of the following is not a correct monomer-polymer pairing?
A) Amino acid - Protein
B) Nucleotide - Nucleic acid
C) Monosaccharide - Lipid
D) All of the above are correct
Answer: C
