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Osmosis
Diffusion
Osmosis
Identify the process occurring in each of the
boxes below.
Identify the process occurring in each of the
boxes below.
Active Transport
Don’t worry about for
the test 
Osmosis
7. I am doing an experiment. I take some dialysis
tubing (a semi-permeable membrane) and fill it with
a 50% sugar solution. Sugar molecules are very big,
and cannot pass through the membrane. If I want to
make the cell gain weight, which beaker should I
place it into? **Explain your choice**
a. beaker of 70% sugar solution
b. beaker of water
c. beaker of 90% sugar solution
d. beaker of any type of sugar solution
e. None of these conditions would cause the cell to gain weight
7. I am doing an experiment. I take some dialysis
tubing (a semi-permeable membrane) and fill it with
a 50% sugar solution. Sugar molecules are very big,
and cannot pass through the membrane. If I want to
make the cell gain weight, which beaker should I
place it into? **Explain your choice**
a. beaker of 70% sugar solution
b. beaker of water
c. beaker of 90% sugar solution
d. beaker of any type of sugar solution
e. None of these conditions would cause the cell to gain weight
8. If someone sitting at the other end of a
restaurant smokes a cigarette, you may still breathe
in some of the smoke. The movement of smoke
through the air of the restaurant is an example of
what type of transport? How did the smoke
molecules move?
8. If someone sitting at the other end of a
restaurant smokes a cigarette, you may still breathe
in some of the smoke. The movement of smoke
through the air of the restaurant is an example of
what type of transport? How did the smoke
molecules move? Diffusion, high to low
concentration (small molecule, not water)
10. Describe an isotonic solution for the
cell pictured below.
45% NaCl
55% water
10. Describe an isotonic solution for the
cell pictured below.
45% NaCl
55% water
45% NaCl
55% water
12. A lab technician needs to determine whether
cells in a test tube are prokaryotic or eukaryotic.
The technician has several dyes she could use to
stain the cells. Four of the dyes are described in
the table below.
Which dye could the technician use to determine
whether the cells are prokaryotic or eukaryotic?
12. A lab technician needs to determine whether
cells in a test tube are prokaryotic or eukaryotic.
The technician has several dyes she could use to
stain the cells. Four of the dyes are described in
the table below.
Which dye could the technician use to determine
whether the cells are prokaryotic or eukaryotic?
Nile Blue because only eukaryotes have nuclei
13. Which of the following statements best
explains why oxygen diffuses from the alveoli into
the blood? **Explain why**
a. The diaphragm draws oxygen into the alveoli at a rapid speed.
b. Alveoli cells contain hemoglobin to transfer gases to the blood.
c. The concentration of oxygen is greater in the alveoli than in the
blood.
d. Red blood cells move one at a time through the capillaries
surrounding the alveoli.
13. Which of the following statements best
explains why oxygen diffuses from the alveoli into
the blood? **Explain why**
a. The diaphragm draws oxygen into the alveoli at a rapid speed.
b. Alveoli cells contain hemoglobin to transfer gases to the blood.
c. The concentration of oxygen is greater in the alveoli than in the
blood.
d. Red blood cells move one at a time through the capillaries
surrounding the alveoli.
14. Indicate whether the following statements are true or false regarding the
plasma membrane.
a.
b.
c.
d.
e.
To provide an energy source for most cell activities
To regulate molecule transport for cell activities
To provide a place to collect and store waste products within the cell
To provide a barrier to the movement of substances in and out of the cell
To provide a substrate for enzyme activity in the cell
14. Indicate whether the following statements are true or false regarding the
plasma membrane.
a.
b.
c.
d.
e.
To provide an energy source for most cell activities F
To regulate molecule transport for cell activities T
To provide a place to collect and store waste products within the cell F
To provide a barrier to the movement of substances in and out of the cell T
To provide a substrate for enzyme activity in the cell F
16. Amino acids, sugars, and ions move across the
cell membrane. Their movement from a region of
high concentration to a region of low
concentration is accomplished by special proteins
in the membrane. Which of the following terms
applies to this type of cell transport? **List 3 key
words you used to decide.**
A. active transport
B. facilitated diffusion
C. osmosis
D. transcription
16. Amino acids, sugars, and ions move across the
cell membrane. Their movement from a region of
high concentration to a region of low
concentration is accomplished by special proteins
in the membrane. Which of the following terms
applies to this type of cell transport? **List 3 key
words you used to decide.**
A. active transport
B. facilitated diffusion
C. osmosis
D. transcription
17. The diagram below shows changes in the
concentrations of sodium and potassium ions
inside and outside a nerve cell. These changes
prepare the nerve cell to conduct an electrical
impulse. Explain the process shown in the diagram
in 10 words.
17. The diagram below shows changes in the
concentrations of sodium and potassium ions
inside and outside a nerve cell. These changes
prepare the nerve cell to conduct an electrical
impulse. Explain the process shown in the diagram
in 10 words.
Active transport
because the ions are
moving from a low to
high concentration
19. List 3 organelles that eukaryotic and
prokaryotic cells have in common.
**Reminder for your test: They both have
DNA, but Eukaryotes store the DNA in the
nucleus ***
19. List 3 organelles that eukaryotic and
prokaryotic cells have in common.
RIBOSOMES, cell membranes, cytoplasm
**Reminder for your test: They both have
DNA, but Eukaryotes store the DNA in the
nucleus ***
20. What type of transport is being used to
move the top H+ molecule?
20. What type of transport is being used to
move the top H+ molecule? Active Transport
21. What type of transport is being used to
move the sucrose molecule?
21. What type of transport is being used to move
the sucrose molecule? Facilitated diffusion (no ATP
present, but through a protein channel)
22. Describe the
process that caused
the change to the
potato’s mass.
**Make sure to
include the type of
solution the potato
was placed in.**
22. Describe the
process that caused
the change to the
potato’s mass.
Osmosis; the cell was
in a hypertonic
solution, which is
why it lost mass
23. Describe the type of solution that each cell
is resting in below. **Hint: hyper, hypo, iso**
Cell A
Cell B
Cell C
23. Describe the type of solution that each cell is
resting in below. Cell A = isotonic, Cell B = hypotonic,
Cell C = hypertonic
Cell A
Cell B
Cell C
24. The picture below represents a container
separated by a membrane. The black dots
represent glucose molecules. According to the
diagram, in which direction will osmosis occur if
the membrane is impenetrable to the glucose.
24. The picture below represents a container separated
by a membrane. The black dots represent glucose
molecules. According to the diagram, in which direction
will osmosis occur if the membrane is impenetrable to
the glucose. Water will move from side A to B (hypo is
low (glucose), the cell will grow)
water
glucose
25. Describe the
function of part D
in the cell
membrane
pictured.
25. Describe the
function of part D in
the cell membrane
pictured. D is a
protein, used as a
channel in
facilitated diffusion
or active transport
(allows large
molecules to
enter/leave the cell)
26. According to the experiment below, which
molecule will have the highest rate of diffusion
across the cell membrane?
26. According to the experiment below, which molecule will have the
highest rate of diffusion across the cell membrane? Molecular
diameter = size of molecule, so the smaller the molecule the higher
the rate of diffusion. A molecule of .3-.4 nm would diffuse the fastest
27. Explain the reason for the different rates of
glucose intake by the cell as depicted in the graph
below.
27. Explain the reason for the different rates of glucose intake by the cell
as depicted in the graph below. Glucose must be a large molecule
because it won’t go through the cell membrane without a protein
channel (facilitated diffusion)
The diagram represents part of an animal cell which has been put in distilled water.
Distilled water
Cell surface
membrane
Cytoplasm
28. Explain
what will
occur in the
cell based
on the
graphic.
Water
molecules
Solute
molecules
The diagram represents part of an animal cell which has been put in distilled water.
28. Explain
what will
occur in the
cell based on
the graphic.
The cell will
grow bigger
(hypotonic
solution)
Distilled water
Cell surface
membrane
Cytoplasm
Water
molecules
Solute
molecules
29. Compare active transport and facilitated
diffusion based on the chart below.
Feature
Osmosis
Active
transport
Requires energy from
ATP
X
Requires protein
carrier molecules
X
Can take place against
a concentration
gradient
X
Facilitated
diffusion
X
29. Compare active transport and facilitated diffusion
based on the chart below. Facilitated diffusion and active
transport both require proteins to work, but active
transport requires energy (low to high concentration—
against the concentration gradient) and facilitated
diffusion doesn’t require energy.
Feature
Osmosis
Active
transport
Requires energy from
ATP
X
Requires protein
carrier molecules
X
Can take place against
a concentration
gradient
X
Facilitated
diffusion
X
30.
A kidney consists of a large number of very small tubes called kidney tubules. Some of the cells which line these
tubules are able to absorb glucose. The diagram shows how these cells absorb glucose from the contents of
the tubule and secrete it into the blood.
Inside of
kidney tubule
Cell
Blood
Glucose moves into cell by
Glucose secreted from cell
facilitated diffusion
by active transport
Organelle A
Glucose moves into the cell by facilitated diffusion. Osmosis also takes place across the plasma
membrane. Give two differences between facilitated diffusion and osmosis.
30.A kidney consists of a large number of very small tubes called kidney tubules. Some of the cells which line these
tubules are able to absorb glucose. The diagram shows how these cells absorb glucose from the contents of
the tubule and secrete it into the blood.
1) Facilitated
diffusion
Inside of
involves large kidney tubule
Cell
Blood
molecules,
osmosis is
the
Glucose secreted from cell
Glucose moves into cell by
movement of
water
by active transport
facilitated diffusion
2) Facilitated
diffusion
requires a
Organelle A
protein
channel, in
osmosis
water can
move
Glucose moves into the cell by facilitated diffusion. Osmosis also takes place across the plasma
through the
membrane. Give two differences between facilitated diffusion and osmosis.
lipid bilayer