For cells in which carbon dioxide crosses the plasma membrane by simple diffussion, what determines the rate at which carbon dioxide enters the cell?
a.the concentration od dioide carbon ofneach side of the memnbrane
b. the amount of ATP produced by the cell
c. the number of carrier proteins in the membrane
d. the amount of enery available
e.the concentration of hydrogen ions on each side of the membrane

Carbohydrates associated with cellular membranes are typically asociated with
a.proteins inside cells
b. lipids inside cells
c. proteins outside cells
d. proteins of the internal organelles
e. the nuclear membrane

Thanks alot

for the frist one i have no idea for the second one i think is c bit im not sure...thanks!

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