Name______Date______
Model 5- Cell Structure and Function Review
1) Why is a cell membrane a phospholipid bilayer instead of a monolayer? Why does it assume
that configuration?
2) Based on the structure of the cell membrane, explain why these substances will or won't
diffuse through the cell membrane (NOTE: they are not using channels).
Molecule
Glucose
Water
Protein
Salt
Carbon dioxide
Will or Won't
diffuse through
Won't
Reason
Too big
3) Identify the initial solutions as isotonic, hypotonic or hypertonic. Justify your answer and
complete the storyboards. Key b, c, and d the same as for a.
a.
External
Molecular
Internal
Initial Intermediate Final
Key: Water Sugar Salt + - Protein
Name______Date______
Model 5- Cell Structure and Function Review
b.
-
External
Molecular
Internal
+
Initial
+
-
Intermediate
Final
Key: Water Sugar Salt Protein
c.
External
Molecular
Internal
Initial Intermediate Final
Key:
d.
External
Molecular
Internal
Initial Intermediate Final
Key:
Name______Date______
Model 5- Cell Structure and Function Review
4) Storyboard the motion of molecules when a potato is allowed to sit in open air and dehydrates.
External
Internal
Initial Intermediate Final
Key:
a. Is the solute concentration inside the potato cells more or less after dehydration?.
Explain your reasoning.
Name______Date______
Model 5- Cell Structure and Function Review
5) Look at this storyboard of a cell in solution. In the initial storyboard, label cell wall, cell
membrane, cytoplasm, nucleus, chloroplasts, as appropriate.
a. Is this an animal or plant cell? How do you know?
External
Cellular
Internal
Initial Intermediate Final
External
Molecular
Internal
+
-
+
-
+
-
+
-
+
-
+
-
Initial
Key: Water:
Sugar:
Intermediate
Protein:
Ions: + &
-
Final
b. Describe what happens to this cell and explain why that is happening.
c. Describe what happens to the cell membrane and explain what property of the
membrane allows it to change shape.
d. Is the cell in a hypotonic, hypertonic or isotonic solution? Justify your answer.
e. Why should you not drink saltwater if you are adrift at sea? Explain.
6. For each of the structures below, state the function and how it relates to
sustaining life.
a. Cell membrane
b. Nucleus
c. Rough Endoplasmic Reticulum
d. Smooth Endoplasmic Reticulum
e. Ribosomes
f. Golgi Apparatus
g. Lysosomes
h. Peroxisome
i. Vacuole
j. Mitochondria
k. Chloroplast
l. Cell Wall
Name______Date______
Model 5- Cell Structure and Function Review
Complete the table below.
Representation
Numerical 0.1M Sucrose 0.45M Sucrose 0.9M Sucrose
Verbal Isotonic
Pictorial:
S Organism
C
A
L Cellular
E
Molecular
+
-
+
-
E
I
Graphical Shown above Shown above Shown above
7) If you repeated the potato core lab using cores that were half the volume of the ones you used
in the potato core lab, what do you think would happen to your graphs compared to the ones
you generated in the original lab? Explain.
6