Chapter 5-8 BSC 1010C Exam Review Questions With
Complete Solutions
Which of the following functions of membrane proteins is
important in tissue formation during embryonic development in
animals?
Membrane proteins with short sugar chains form identification
tags that are recognized by other cells.
Which of the following statements concerning carbohydrates
associated with the plasma membrane is correct?
Membrane carbohydrates function primarily in cell-cell
recognition.
Consider the currently accepted fluid mosaic model of the
plasma membrane. Where in the membrane would
carbohydrates most likely be found?
On the outside (external) surface of the membrane
Which statement about the sidedness of the plasma membrane is
correct?
All of the listed responses are correct.
Which of the following molecules is most likely to passively
diffuse across the plasma membrane?
Carbon dioxide
Which of the following would be least likely to diffuse through
a plasma membrane without the help of a transport protein?
,A large, polar molecule
Which of the following statements about passive transport is
correct?
Passive transport permits the solute to move in either direction,
but the net movement of solute molecules occurs down the
concentration gradient of the molecule.
Cells A and B are the same size, shape, and temperature, but cell
A is metabolically less active than cell B, and cell B is actively
converting oxygen to water in cellular respiration. Oxygen will
diffuse more rapidly into cell __________ because __________.
B; the diffusion gradient in cell B is steeper
Which of the following statements about diffusion is true?
It is a passive process.
The internal solute concentration of a plant cell is about 0.8 M.
To demonstrate plasmolysis, it would be necessary to suspend
the cell in what solution?
1.0 M
A single plant cell is placed in an isotonic solution. Salt is then
added to the solution. Which of the following would occur as a
result of the salt addition?
Water would leave the cell by osmosis, causing the volume of
the cytoplasm to decrease.
Seawater is hypertonic to cytoplasm in vertebrate cells and in
plant cells. If a red blood cell and a plant cell were placed in
seawater, what would happen to the two types of cells?
, Both cells would lose water; the red blood cell would shrivel,
and the plant plasma membrane would pull away from the cell
wall.
Which of these statements describes some aspect of facilitated
diffusion?
Facilitated diffusion of solutes may occur through channel or
transport proteins in the membrane.
Which of the following is false in regard to facilitated diffusion?
Facilitated diffusion requires the hydrolysis of ATP.
A selectively permeable membrane separates two solutions.
Water is able to pass through this membrane; however, sucrose
(a disaccharide) and glucose (a monosaccharide) cannot pass.
The membrane separates a 0.2-molar sucrose solution from a
0.2-molar glucose solution. With time, how will the solutions
change?
Nothing will happen because the two solutions are isotonic.
The concentration of solutes in a red blood cell is about 2%, but
red blood cells contain almost no sucrose or urea. Sucrose
cannot pass through the membrane, but water and urea can.
Osmosis would cause red blood cells to shrink the most when
immersed in which of the following solutions?
A hypertonic sucrose solution
Green olives may be preserved in brine, which is a 30% salt
solution. How does this method of preservation prevent
microorganisms from growing in the olives?
Complete Solutions
Which of the following functions of membrane proteins is
important in tissue formation during embryonic development in
animals?
Membrane proteins with short sugar chains form identification
tags that are recognized by other cells.
Which of the following statements concerning carbohydrates
associated with the plasma membrane is correct?
Membrane carbohydrates function primarily in cell-cell
recognition.
Consider the currently accepted fluid mosaic model of the
plasma membrane. Where in the membrane would
carbohydrates most likely be found?
On the outside (external) surface of the membrane
Which statement about the sidedness of the plasma membrane is
correct?
All of the listed responses are correct.
Which of the following molecules is most likely to passively
diffuse across the plasma membrane?
Carbon dioxide
Which of the following would be least likely to diffuse through
a plasma membrane without the help of a transport protein?
,A large, polar molecule
Which of the following statements about passive transport is
correct?
Passive transport permits the solute to move in either direction,
but the net movement of solute molecules occurs down the
concentration gradient of the molecule.
Cells A and B are the same size, shape, and temperature, but cell
A is metabolically less active than cell B, and cell B is actively
converting oxygen to water in cellular respiration. Oxygen will
diffuse more rapidly into cell __________ because __________.
B; the diffusion gradient in cell B is steeper
Which of the following statements about diffusion is true?
It is a passive process.
The internal solute concentration of a plant cell is about 0.8 M.
To demonstrate plasmolysis, it would be necessary to suspend
the cell in what solution?
1.0 M
A single plant cell is placed in an isotonic solution. Salt is then
added to the solution. Which of the following would occur as a
result of the salt addition?
Water would leave the cell by osmosis, causing the volume of
the cytoplasm to decrease.
Seawater is hypertonic to cytoplasm in vertebrate cells and in
plant cells. If a red blood cell and a plant cell were placed in
seawater, what would happen to the two types of cells?
, Both cells would lose water; the red blood cell would shrivel,
and the plant plasma membrane would pull away from the cell
wall.
Which of these statements describes some aspect of facilitated
diffusion?
Facilitated diffusion of solutes may occur through channel or
transport proteins in the membrane.
Which of the following is false in regard to facilitated diffusion?
Facilitated diffusion requires the hydrolysis of ATP.
A selectively permeable membrane separates two solutions.
Water is able to pass through this membrane; however, sucrose
(a disaccharide) and glucose (a monosaccharide) cannot pass.
The membrane separates a 0.2-molar sucrose solution from a
0.2-molar glucose solution. With time, how will the solutions
change?
Nothing will happen because the two solutions are isotonic.
The concentration of solutes in a red blood cell is about 2%, but
red blood cells contain almost no sucrose or urea. Sucrose
cannot pass through the membrane, but water and urea can.
Osmosis would cause red blood cells to shrink the most when
immersed in which of the following solutions?
A hypertonic sucrose solution
Green olives may be preserved in brine, which is a 30% salt
solution. How does this method of preservation prevent
microorganisms from growing in the olives?
