Enzymes are proteins which facilitate chemical reactions in cells by
A. binding to subrtate molecules (reactants) in such a way that the energy needed to initiate a reaction is lowered.
B. bringing together substrate molecules, enabling reactions that otherwise would not occur.
C. shifting the balance (equilibreum) between products and reactants.
D. altering the products of reactions into molecules more readily used in celllular metabolism.
Answer: A