The movement of glucose into a cell against a concentration gradient is most likely to be accomplished by _____.
(a) passive diffusion of the glucose through the lipid bilayer
(b) facilitated diffusion of the glucose using a carrier protein
(c) movement of glucose into the cell through a glucose channel
(d) co-transport of the glucose with a proton or sodium ion that was pumped across the membrane using the energy of ATP hydrolysis
(e) All of the above are equally likely.
