BIL150 Exam 2 Questions with Correct Answers
Question 1:
Which of the following statements best describes why hydrolysis reactions occur more readily
in solution than dehydration reactions do?
Answer:
Hydrolysis reactions are exergonic and increase entropy of the system.
Question 2:
Passive leakage of partially digested material from the small intestine into the human
abdominal cavity may result from defects in which of the following type of intercellular
junction?
Answer:
tight junctions
Question 3:
Examination of a cell by transmission electron microscopy reveals a high density of ribosomes in
the cytoplasm. This observation suggests that the cell is actively producing large amounts of
which of the following molecules?
Answer:
proteins
Question 4:
The mathematical expression for the change in free energy of a system is ΔG = ΔH - TΔS. Which
of the following statements best describes a term in this equation?
Answer:
ΔG is the change in free energy.
Question 5:
Which of the following types of reactions would decrease the entropy within a cell?
Answer:
anabolic reactions
, Question 6:
The nuclear lamina is an array of intermediate filaments that line the inner surface of the
nuclear membrane. Disassembly of the lamina by chemical treatment would most likely result
in which of the following consequences?
Answer:
a change in the shape of the nucleus
Question 7:
The ΔG of ATP hydrolysis in a test tube under standard conditions is -7.3 kcal/mol. The ΔG for
the reaction A + B = C under the same conditions is +4.0 kcal/mol. What is the overall
free-energy change for the coupled reactions under these conditions?
Answer:
-3.3 kcal/mol.
Question 8:
Which of the following statements best summarizes the figure above?
Answer:
ATP is a molecule that acts as an intermediary to store energy for cellular work
Question 9:
Which one of the following statements about the endomembrane system is correct?
Answer:
Proteins that will be secreted from the cell are likely to be found in closed spaces bounded by
membranes of the endomembrane system.
Question 10:
Which of the following statements best describes the central role that ATP plays in cellular
metabolism?
Answer:
ATP provides energy coupling between exergonic and endergonic reactions
Question 11:
Which of the following functions is NOT associated with the cytoskeleton in eukaryotic cells?
Answer:
Question 1:
Which of the following statements best describes why hydrolysis reactions occur more readily
in solution than dehydration reactions do?
Answer:
Hydrolysis reactions are exergonic and increase entropy of the system.
Question 2:
Passive leakage of partially digested material from the small intestine into the human
abdominal cavity may result from defects in which of the following type of intercellular
junction?
Answer:
tight junctions
Question 3:
Examination of a cell by transmission electron microscopy reveals a high density of ribosomes in
the cytoplasm. This observation suggests that the cell is actively producing large amounts of
which of the following molecules?
Answer:
proteins
Question 4:
The mathematical expression for the change in free energy of a system is ΔG = ΔH - TΔS. Which
of the following statements best describes a term in this equation?
Answer:
ΔG is the change in free energy.
Question 5:
Which of the following types of reactions would decrease the entropy within a cell?
Answer:
anabolic reactions
, Question 6:
The nuclear lamina is an array of intermediate filaments that line the inner surface of the
nuclear membrane. Disassembly of the lamina by chemical treatment would most likely result
in which of the following consequences?
Answer:
a change in the shape of the nucleus
Question 7:
The ΔG of ATP hydrolysis in a test tube under standard conditions is -7.3 kcal/mol. The ΔG for
the reaction A + B = C under the same conditions is +4.0 kcal/mol. What is the overall
free-energy change for the coupled reactions under these conditions?
Answer:
-3.3 kcal/mol.
Question 8:
Which of the following statements best summarizes the figure above?
Answer:
ATP is a molecule that acts as an intermediary to store energy for cellular work
Question 9:
Which one of the following statements about the endomembrane system is correct?
Answer:
Proteins that will be secreted from the cell are likely to be found in closed spaces bounded by
membranes of the endomembrane system.
Question 10:
Which of the following statements best describes the central role that ATP plays in cellular
metabolism?
Answer:
ATP provides energy coupling between exergonic and endergonic reactions
Question 11:
Which of the following functions is NOT associated with the cytoskeleton in eukaryotic cells?
Answer:
