Answer:
d) they are consumed during the reaction
Explanation:
Enzymes are the biocatalysts that serve to accelerate the rate of the chemical reactions by lowering down the required activation energy.
Enzymes are not used during the reactions. There are no physical or chemical changes in the enzymes during the chemical reactions. After completion of one chemical reaction, enzymes release the products and become available to catalyze the next round of the reaction.
