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An enzyme/catalyst
A substance that speeds the changing of food into a usable form* is called an enzyme. More generally, in any chemical context, a substance that speeds a reaction without itself being changed is called a catalyst._______________________________________*This changing of food into a usable form is called "digestion".
catalyst-by lowering activation energy
enzyme
A substance that speeds up a chemical reaction is known as a CATALYST.
The enzyme reduces the activation energy of the reaction, therefore chemical reaction speeds are increased.
an enzyme speeds up a chemical reaction.
Catalyst
An enzyme speeds up a chemical reaction by lowering the activation energy.
A catalyst is a substance that speeds up the rate of a chemical reaction. Catalysts work by lowering a reaction's activation energy.A substrate is a reactant of an enzyme-catalyzed reaction.
An enzyme speeds up a chemical reaction.
It speeds up the reaction by lowering activation energy.