Glucose is an important biomolecule. which of these statements is true regarding the movement of glucose into and out of cells? a) glucose, a small molecule, can diffuse between the phospholipids. b) glucose requires both a membrane protein and atp energy in order to enter or exit a cell. c) glucose, a nonpolar molecule, can pass freely across the phospholipid bilayer from high to low concentration. d) glucose is a large, hydrophilic molecule and must use a channel protein to enter or exit a cell, but does not require energy.

b is the correct answer

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.