I believe you are looking for the term "accelerant." A catalyst.
Enzyme
1) Something that speeds up a chemical reaction but that is not changed by the reactions is called a catalyst.2)An element is a pure substance (not a compound) and while some elements (such as platinum) can speed up chemical reactions (eg platinum in a car exhaust catalytic converter), by far the most common catalysts are in fact compounds not elements. These compounds are organic in nature and called enzymes.
The answer is catalyst. The question bugs me a little, because not all catalysts are elements. Some are compounds.
Yes, proteins which catalyze chemical reactions are called enzymes.
Catalyst. And in cell it is enzyme
A catalyst which in biology is called an enzyme.
This substance is called catalyst; and in living systems it is an enzyme.
Stimulants - but more probably catalyst.
An enzyme is a type of protein that speeds up chemical reactions in living things by lowering the activation energy of said reactions.
Enzyme
it is an enzyme that speeds up chemical reactions.
enzymes