CAS BI 203 Lecture Notes - Lecture 5: Electrochemical Gradient, Antiporter, Caveolae
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18 Jan 2018
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1. Which one of the following cannot be transported into a typical mammalian cell by facilitated transport even though its import might be thermodynamically favored?
A. Na+ | |||||||||
B. Ca2+ | |||||||||
C. Fe3+ | |||||||||
D. H2O | |||||||||
E. C6H12O6 2. What do uniporters and ion channels have in common?
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3. What specifically defines a cotransporter as an antiporter?
A. Both molecules are imported into the cell. | |
B. Both molecules are exported out of the cell. | |
C. Both molecules move down their concentration gradients. | |
D. One molecule is transported against its concentration gradient & the other is transported down its concentration gradient. | |
E. One molecule is imported and the other molecule is exported. |
4. True or False: Transport directed by uniporters is reversible and the direction of of transport will change if the direction of the concentration gradient changes.
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