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- 1. Multiple Choice
Identify cholesterol molecule
structure a
structure b
structure h
structure i
- 2. Multiple Choice
Identify microfilament of the cytoskeleton
structure i
structure b
structure g
structure c
- 3. Multiple Choice
identify a glycolipid
structure a
structure d
structure e
structure g
- 4. Multiple Choice
Identify a peripheral protein
structure a
strucure b
structure g
structure h
- 5. Multiple Choice
Plasma membranes are selectively permeable. This means
anything can pass in and out
the membrane regulates the passage of the material in and out of the cell
glucose cannot enter the cell
cholesterol cannot enter
- 6. Multiple Choice
Which is NOT a function of the membrane?
it forms a selective barrier
it has receptors for chemical messages
it is the control center of the cell
it is involved in self recognition
- 7. Multiple Choice
Small, nonpolar, hydrophobic molecules such as fatty acids
easily pass through the membrane's bilayer
very slowly diffuse through the bilayer
require transport proteins
enter through endocytosis
- 8. Multiple Choice
Membrane phospholipids
have hydrophobic heads that face the center of the membrane and are shielded from water
have hydrophilic tails that face outward
remain fluid because they are tightly packed
none of these
- 9. Multiple Choice
Which of the following substances would have the most trouble crossing the membrane by diffusing through the bilayer?
water
oxygen
carbon dioxide
a sodium ion
- 10. Multiple Choice
The cholesterol associated with membranes
is attached to proteins and extends into the environment surrounding the cell
helps stabilize the membrane at body temperature
is an abnormality resulting from a diet high in cholesterol
both a and c
- 11. Multiple Choice
A major function of glycoproteins and glycolipids in the membane is to
glue cells together to form tissues
allow cells to identify each other
attach membrane to cytoskeleton
help retain shape
- 12. Multiple Choice
When doctors perform organ transplants, they choose a donor tissue match. Which component is being matched?
membrane phospholipids
cytoskeleton
cell surface carbohydrates
cholesterol
- 13. Multiple Choice
The fluid mosaic model describes a membrane consisting of
a phospholipid bilayer with embedded proteins
2 layers of phospholipids with proteins in between
individual proteins and phospholipids that can drift
both a and c
- 14. Multiple Choice
What kinds of molecules pass through a cell membrane most easily?
ionic
small and hydrophobic
large polar
large and hydrophobic
- 15. Multiple Choice
Which of the following would likely move through the lipid bilayer most rapidly?
potassium
an amino acid
Carbon dioxide
glucose
- 16. Multiple Choice
Which of the following allows water to move faster across cell membranes?
aquaporins
ATP
peripheral proteins
the sodium-potassium pump
- 17. Multiple Choice
Which of these is NOT embedded in the hydrophobic portion of the lipid bilayer at all?
peripheral proteins
transmembrane proteins
integral proteins
all of these are embedded
- 18. Multiple Choice
Which structure is the hydrophilic polar head of the phospholipid molecule?
F
D
C
A1
- 19. Multiple Choice
Which structure is the hydrophobic tail of the phospholipid molecule?
E
B
G
A2
- 20. Multiple Choice
This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHOBIC?
the phosphate "head"
the lipid "tails"
- 21. Multiple Choice
Where can PROTEINS be found when part of a plasma membrane?
On the outside of the membrane
On the inside of the membrane
Embedded part of the way into the membrane
Embedded the whole way through the membrane
All of the above
- 22. Multiple Choice
What is the function of cholesterol in a plasma membrane?
To make the membrane flexible
To control the effect of temperature changes
To attract water molecules
To allow nutrients and other essential molecules into the cell
- 23. Multiple Choice
Which type of biological macromolecule is the main component of the plasma membrane?
carbohydrate
lipid
protein
nucleic acid
- 24. Multiple Choice
Lipid tails
E
F
G
I
- 25. Multiple Choice
Phosphate head
E
F
G
I
- 26. Multiple Choice
Channel Protein
A
B
C
D
- 27. Multiple Choice
Carrier Protein
A
B
C
D
- 28. Multiple Choice
How molecule in the figure can be transported across plasma membrane? (can be more than one answer)
Down concentration gradient
Using channel protein
Using carrier protein
Diffuse through phospholipid bilayer
- 29. Multiple Choice
Statements below are true about receptor medited endocytosis EXCEPT .
It is a specialized type of pinocytosis.
It is a type of passive transport
Substance can be acquired even in low quantities in extracellular fluid
It enables cells to acquire bulk quantities of specific substance.
- 30. Multiple Choice
Small polar molecules like O2 and CO2enter a cell through
simple diffusion
osmosis
facilitated diffusion
phagocytosis
- 31. Multiple Choice
The animal cell on the left is in a(n) __________________ environment
Hypertonic
Hypotonic
Isotonic
- 32. Multiple Choice
Which form of active transport is being shown?
Facilitated Diffusion
Exocytosis
Endocytosis
Proton pump
- 33. Multiple Choice
sodium-potassium pump transport
only potassium ions and sugar molecules
3 potassium ions out of the cell
3 sodium ions into the cell
2 potassium ions into the cell
- 34. Multiple ChoiceOsmosis is the movement of _____ across a membrane.foodenergyoxygenwater
- 35. Multiple Choice
white blood cells engulfing invading bacteria is an example of
Phagocytosis
Exocytosis
Pinocytosis
Facilitated Diffusion
- 36. Multiple Choice
Name small compartment enclosed by a membrane formed to transport of material during bulk transport.
vesicles
large vacuole
mitochondria
lysosome
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