For Each of the Following Sentences, Fill in the Blanks

Essay

For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below.Not all words or phrases will be used; each word or phrase should be used only once.
$\begin{array}{lll}\text { activation } & \text { free } & \text { selectively } \\\text { chemical bond } & \text { kinetic } & \text { slowly } \\\text { completely } & \text { rapidly } & \text { unfavorable } \\\text { favorable } & &\end{array}$

By definition, catalysts allow a reaction to occur more __________.
Chemical reactions occur only when there is a loss of __________ energy.Enzymes act more __________ than other catalysts.A catalyst decreases the __________ energy of a reaction.