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- 1. Multiple Choice
The picture is an example of...
active tranport
passive transport
diffusion
osmosis
- 2. Multiple Choice
Which of the following is responsible for getting large or charged (polar) molecules across the cell membrane?
E
B
C
D
- 3. Multiple Choice
Hydrophobic region of the cell membrane?
E
B
C
A
- 4. Multiple Choice
Which form of active transport is being shown? (Inside of the cell is tan colored)
Facilitated Diffusion
Exocytosis
Endocytosis
Receptor-mediated endocytosis
- 5. Multiple Choice
Which of the following functions as a recognition site for interactions between cells?
Phospholipids
Cholesterol
Fatty acids
Glycolipids
- 6. Multiple Choice
Which of the following is the driving force for facilitated diffusion?
Concentration gradient
ATP hydrolysis
ADP hydrolysis
Phosphorylation
- 7. Multiple Choice
What type of transport is this?
Endocytosis
Diffusion
Exocytosis
Osmosis
- 8. Multiple Choice
What type of organelle is used during endocytosis and exocytosis?
Endoplasmic Reticulum
Golgi Body
Vesicle
Lysosome
- 9. Multiple Choice
What type of transport is represented by figure "B"?
Active Transport
Facilitated Diffusion
Protein Transport
Osmosis
- 10. Multiple Choice
Cell membranes are composed primarily of.....
nucleotides and nucleosides
enzymes, electron acceptors, and electron donors
monosaccharides and diasaccharides
lipids
- 11. Multiple Choice
The compounds in plasma membranes that form a barrier to the movement of hydrophilic materials across the membrane are
integral membrane proteins
carbohydrates
phospholipids
peripheral membrane proteins
- 12. Multiple Choice
Which statement about cholesterol molecules is true?
They help hold a membrane together.
They alter the fluidity of the membrane.
They attach to carbohydrates.
They disrupt membrane function.
- 13. Multiple Choice
Plasma membranes are relatively impermeable to water-soluble molecules because.......
the membranes are waxy
water molecules are non-polar
their bilayer is comprised of phospholipids
they have salt crystals embedded within them
- 14. Multiple Choice
The difference between osmosis and diffusion is that......
diffusion is passive transport, whereas osmosis is active transport
only in diffusion do molecules move from areas of high concentration to areas of low concentration
osmosis is the opposite of diffusion and only involves the movement of water
osmosis refers specifically to the movement of water, whereas diffusion refers to the movement of any type of molecules
- 15. Multiple Choice
Which of the following is not one of the functional roles of membrane proteins?
Allowing movement of molecules that otherwise would be excluded by the lipid components of the membrane
Transferring signals from outside the cell to inside the cell
Facilitating the transport of macromolecules across the membrane
Stabilizing the phospholipid bilayer
- 16. Multiple Choice
What type of transport would release enzymes from pancreatic cells?
exocytosis
pinocytosis
phagocytosis
facilitated diffusion
- 17. Multiple Choice
___________ have 2 functions in the cell membrane.
1) They act like gatekeepers, only letting certain things in.
2) Enzyme receptors embedded in the membrane.
Carbohydrates
Proteins
Phospholipids
Cholesterol
- 18. Multiple Choice
Active transport requires ______, and moves materials from __________________ concentration, and goes _______ the concentration gradient.
No energy, low to high, against
ATP, high to low, with
ATP, low to high, with
ATP, low to high, against
- 19. Multiple Choice
The difference in the concentration of a substance from one location to another is called.....
diffusion
osmosis
concentration gradient
passive transport
- 20. Multiple Choice
Which way will the water molecules in the image move during osmosis?
Out of the cell, so the cell shrinks
Out of the cell, so the cell swells
Into the cell, so the cell shrinks
Into the cell, so the cell swells
- 21. Multiple Choice
Iodine turns dark purple when in contact with starch. After an hour, the solution in the dialysis tubing turned dark purple. Why?
The starch in the tubing diffused out.
The iodine and water diffused in.
The iodine changed into starch.
The starch changed into iodine
- 22. Multiple Choice
In this picture, which way will the water move?
Water will move into the cell
Water will move out of the cell
Water will move in and out of the cell
Water will not move
- 23. Multiple Choice
What is the importance of surface area to volume ratio as a factor limiting cell size?
As the volume of a cell increases, the ratio of its surface area to volume decreases
The size of the cell has to be reduced and kept within size limits due to SA/V ratio
A large volume means longer diffusion time
All of these
- 24. Multiple Choice
Which technique was used to falsify the Davson-Danielli model of the cell membrane?
Freeze etching
Electrophoresis
X-ray diffraction
Model building
- 25. Multiple Choice
Which term best describes the properties of phospholipids and is a word Mrs. Hamilton can't pronounce?!
Amphipathic
Psychopathic
Abiogenesis
Endosymbiotic
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