2024
BIO 121 Exam 2
, BIO 121 Exam 2: 60 Verified Questions & Answers from
Chapters 6-8 (2024)
1. Which of the following frequently imposes a limit on cell size?
A) the absence of a nucleus
B) The number of mitochondria in the cytoplasm
C) Ratios of surface area to volume
D) The volume of the endomembrane system
Answer: C
2. Use the following information to answer the question below.
The figure illustrates the energy states associated with the reaction A + B ↔ C + D.
Which of the following in the figure would be the same in either an enzyme-catalyzed or
a noncatalyzed reaction?
, A) a
B) b
C) c
D) d
Answer: D
3. Both the volume and the surface area for three different cells were measured. These
values are listed in the following table:
Volume Surface Area
Cell 1 9.3 μm3 26.5 μm2
Cell 2 12.2 μm3 37.1 μm2
Cell 3 17.6 μm3 40.6 μm2
Using data from the table above, select the best explanation for why that cell will be
able to eliminate waste most efficiently?
A) Cell 1, since it has the smallest volume and will not produce as much waste as the
other cells. B) Cell 2, since it has the highest ratio of surface area to volume, which
facilitates the exchange of materials between a cell and its environment.
C) Cell 3, since it has the largest surface area, which will enable it to eliminate all of its
wastes efficiently.
D) Cell 3, because it is big enough to allow wastes to easily diffuse through the plasma
membrane.
Answer: B
BIO 121 Exam 2
, BIO 121 Exam 2: 60 Verified Questions & Answers from
Chapters 6-8 (2024)
1. Which of the following frequently imposes a limit on cell size?
A) the absence of a nucleus
B) The number of mitochondria in the cytoplasm
C) Ratios of surface area to volume
D) The volume of the endomembrane system
Answer: C
2. Use the following information to answer the question below.
The figure illustrates the energy states associated with the reaction A + B ↔ C + D.
Which of the following in the figure would be the same in either an enzyme-catalyzed or
a noncatalyzed reaction?
, A) a
B) b
C) c
D) d
Answer: D
3. Both the volume and the surface area for three different cells were measured. These
values are listed in the following table:
Volume Surface Area
Cell 1 9.3 μm3 26.5 μm2
Cell 2 12.2 μm3 37.1 μm2
Cell 3 17.6 μm3 40.6 μm2
Using data from the table above, select the best explanation for why that cell will be
able to eliminate waste most efficiently?
A) Cell 1, since it has the smallest volume and will not produce as much waste as the
other cells. B) Cell 2, since it has the highest ratio of surface area to volume, which
facilitates the exchange of materials between a cell and its environment.
C) Cell 3, since it has the largest surface area, which will enable it to eliminate all of its
wastes efficiently.
D) Cell 3, because it is big enough to allow wastes to easily diffuse through the plasma
membrane.
Answer: B
