BIO 1108 GEORGIA SOUTHERN TEST 2 2026 || MOST
RECENT EXAM 2026|2027 ACTUAL COMPLETE
REAL EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+ |
GUARANTEED SUCCESS!! NEWEST EXAM | JUST
RELEASED!!
Which statement best describes the role of enzymes in biological
reactions?
A. They increase the activation energy required for a reaction.
B. They lower the activation energy required for a reaction.
C. They change the final equilibrium of a reaction.
D. They are permanently consumed during the reaction.
Answer: B
Rationale: Enzymes are biological catalysts that accelerate chemical
reactions primarily by lowering the activation energy. They do not
change the overall free-energy change or equilibrium of the reaction,
and they are not permanently consumed.
Which level of protein structure is determined by the sequence of amino
acids?
A. Primary structure
B. Secondary structure
,C. Tertiary structure
D. Quaternary structure
Answer: A
Rationale: Primary protein structure refers to the specific sequence of
amino acids joined by peptide bonds. This sequence ultimately
influences the higher levels of protein folding.
A peptide bond forms between which functional groups of two amino
acids?
A. Two amino groups
B. Two carboxyl groups
C. An amino group and a carboxyl group
D. Two hydroxyl groups
Answer: C
Rationale: A peptide bond forms between the carboxyl group of one
amino acid and the amino group of another. Water is released during
this dehydration reaction.
Which molecule is the primary energy currency used by cells?
A. DNA
B. Glucose
C. RNA
D. ATP
,Answer: D
Rationale: ATP, or adenosine triphosphate, stores and transfers usable
energy for cellular processes. Its phosphate groups can be removed to
release energy that powers cellular work.
What happens to an enzyme when its environment becomes extremely
acidic or basic?
A. Its amino acid sequence is immediately changed.
B. Its activity may decrease because its three-dimensional structure can
be altered.
C. It always becomes more efficient.
D. It is converted directly into ATP.
Answer: B
Rationale: Extreme pH can disrupt chemical interactions that maintain
an enzyme's three-dimensional structure. This can alter the active site
and reduce or eliminate enzyme activity.
Which organelle is primarily responsible for producing ATP through
aerobic cellular respiration?
A. Mitochondrion
B. Ribosome
C. Golgi apparatus
D. Lysosome
, Answer: A
Rationale: Mitochondria contain the structures and enzymes involved in
aerobic cellular respiration, including the citric acid cycle and electron
transport chain. Most ATP generated during aerobic respiration is
produced there.
What is the main function of ribosomes?
A. Lipid storage
B. DNA replication
C. Protein synthesis
D. ATP storage
Answer: C
Rationale: Ribosomes translate messenger RNA into a specific sequence
of amino acids, producing polypeptides. They may be free in the
cytoplasm or attached to the rough endoplasmic reticulum.
Which process moves molecules from an area of higher concentration to
an area of lower concentration without requiring cellular energy?
A. Active transport
B. Diffusion
C. Endocytosis
D. Exocytosis
Answer: B
RECENT EXAM 2026|2027 ACTUAL COMPLETE
REAL EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+ |
GUARANTEED SUCCESS!! NEWEST EXAM | JUST
RELEASED!!
Which statement best describes the role of enzymes in biological
reactions?
A. They increase the activation energy required for a reaction.
B. They lower the activation energy required for a reaction.
C. They change the final equilibrium of a reaction.
D. They are permanently consumed during the reaction.
Answer: B
Rationale: Enzymes are biological catalysts that accelerate chemical
reactions primarily by lowering the activation energy. They do not
change the overall free-energy change or equilibrium of the reaction,
and they are not permanently consumed.
Which level of protein structure is determined by the sequence of amino
acids?
A. Primary structure
B. Secondary structure
,C. Tertiary structure
D. Quaternary structure
Answer: A
Rationale: Primary protein structure refers to the specific sequence of
amino acids joined by peptide bonds. This sequence ultimately
influences the higher levels of protein folding.
A peptide bond forms between which functional groups of two amino
acids?
A. Two amino groups
B. Two carboxyl groups
C. An amino group and a carboxyl group
D. Two hydroxyl groups
Answer: C
Rationale: A peptide bond forms between the carboxyl group of one
amino acid and the amino group of another. Water is released during
this dehydration reaction.
Which molecule is the primary energy currency used by cells?
A. DNA
B. Glucose
C. RNA
D. ATP
,Answer: D
Rationale: ATP, or adenosine triphosphate, stores and transfers usable
energy for cellular processes. Its phosphate groups can be removed to
release energy that powers cellular work.
What happens to an enzyme when its environment becomes extremely
acidic or basic?
A. Its amino acid sequence is immediately changed.
B. Its activity may decrease because its three-dimensional structure can
be altered.
C. It always becomes more efficient.
D. It is converted directly into ATP.
Answer: B
Rationale: Extreme pH can disrupt chemical interactions that maintain
an enzyme's three-dimensional structure. This can alter the active site
and reduce or eliminate enzyme activity.
Which organelle is primarily responsible for producing ATP through
aerobic cellular respiration?
A. Mitochondrion
B. Ribosome
C. Golgi apparatus
D. Lysosome
, Answer: A
Rationale: Mitochondria contain the structures and enzymes involved in
aerobic cellular respiration, including the citric acid cycle and electron
transport chain. Most ATP generated during aerobic respiration is
produced there.
What is the main function of ribosomes?
A. Lipid storage
B. DNA replication
C. Protein synthesis
D. ATP storage
Answer: C
Rationale: Ribosomes translate messenger RNA into a specific sequence
of amino acids, producing polypeptides. They may be free in the
cytoplasm or attached to the rough endoplasmic reticulum.
Which process moves molecules from an area of higher concentration to
an area of lower concentration without requiring cellular energy?
A. Active transport
B. Diffusion
C. Endocytosis
D. Exocytosis
Answer: B
