The choices can be found elsewhere and as follows:
a. membranes lower the activation energy of biochemical reactions.
b. reactants are within close proximity to each other.
c. membrane-bounded organelles act as catalysts for biochemical reactions.
d. reactants move faster within membrane-bounded organelles.
e. reactants are less likely to encounter each other within membrane-bounded organelles.
The correct answer is option C. Membrane bounded organelles facilitate faster chemical reactions because it act as catalysts for biochemical reactions. Hope this answers the question.
