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Posted: Sun Mar 11, 2018 10:59 pm
Do enzymes always speed up the reaction by lowering the activation energy or can they also act as inhibitors and slow down the reaction?
Posted: Sun Mar 11, 2018 11:03 pm
In every case I can think of, enzymes act as catalysts by lowering the activation energy of the reaction and speeding up the reaction. Cells use a lot of energy, so it is in their best interest to evolve enzymes that will speed up their chemical processes as opposed to slowing them down. Enzymes and active sites can become denatured so that they will no longer bind and be able to act as a catalyst, but in general there are not enzymes that slow down reactions.
Posted: Sun Mar 11, 2018 11:08 pm
Enzymes, by defintion, are catalysts. Therefore, they work by speeding up the reaction and not by slowing down.
Posted: Sun Mar 11, 2018 11:22 pm
Enzymes are catalysts and their job is to lower the activation energy - the energy needed for the reaction to get between the products and reactants point.
Posted: Sat Mar 17, 2018 1:37 pm
What is the difference between a homogeneous catalyst and a heterogeneous catalyst?
Posted: Sat Mar 17, 2018 4:27 pm
A homogeneous catalyst is a catalyst in the same phase as the reactant. A heterogeneous catalyst is a catalyst that is in a different phase than the reactant.