They lower the activation energy required to perform the reaction.
Enzymes lower the activation energy of a chemical reaction. Since more molecules have sufficient energy to react, the reaction occurs faster.
A catalyst. Definition from Pretence Hall Biology: A catalyst is a protein that speeds up the rate of a chemical reaction.
The function of enzymes in living things is to catalyze (instigate, speed up) chemical reactions.
"Catalysts", in general chemical terms, but in living organisms they are usually called "enzymes".
proteins called enzymes. ~HellShadow95
The reaction rate is affected by enzymes.
Enzymes lower the activation energy of a chemical reaction.
enzymes are never consumed in a chemical reaction, therefore the answer to your question is that enzymes that affect the speed of a chemical reaction without being consumed are indeed called enzymes.
No that is false. Enzymes do NOT increase number of collisions in a chemical reaction.
The Reaction Rate
Usually enzymes have the role to catalyse a reaction. That means they aren't changed at all, but they influence the mechanism to reduce the activation energy (the energy needed for the reaction). The reaction is therefore performed more easily. To put it very simply: It speeds up a chemical reaction.
Enzymes are catalysts and increase the speed of a chemical reaction without themselves .A chemical reaction can be represented by a chemical equation. An enzyme is a protein that speeds up a biochemical reaction .