Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
Enzymes reduce activation energy.
Member rating: No Rating | Words: | Submitted: Mon Sep 15 2003
Page Preview
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
ENZYMES * Enzymes are biological catalysts * They are made by living cells. * They can be intracellular or extracellular. * They regulate the chemical reactions which take place in many biological processes. * They are required in very small amounts. * They are used over and over again. Enzymes reduce activation energy Enzymes, in the same way as all catalysts, work by lowering the amount of energy needed to start a reaction. Many reactions which give out energy are prevented from starting by an energy barrier - the activation energy. This is the energy required to break the existing bonds and start the reaction. An enzyme reduces the activation energy necessary to initiate a chemical reaction. It may do this by: * binding the reactants next to each other increases the chance of a reaction * distortion of the reactant molecules as they bind to the enzyme strains bonds which are to be broken * reactants are held...
To see the full version of this document, and 145,345 others
