Biology Questions?

Posted on 2015-09-19 08:25:00 in Biology by WANG

No 1. Each substance, A, B, and C, is transported across the cell membrane via passive transport. Identify the substances corresponding to their specific type of transport checked in the table.

a. A: O2; B: galactose; C: K+ 

b. A: K+; B: O2; C: galactose 

c. A: O2; B: K+; C: galactose 

d. A: galactose; B: K+; C: O2 

No 2. Three substances need to be maintained inside a cell at the concentrations shown in column 2 of the table above. Which substance(s) are most likely to be moved across the membrane by passive transport if the typical external concentrations are those shown in column 3?

a. X only 

b. Y only 

c. X and Z 

d. Y and Z

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