Enzymes

Enzymes are biological catalysts and organic composites .Catalysts are used to speed up the process of chemical reactions by decreasing the activation energy that is needed.(activation energy is the energy needed to start a reaction)Catalysts control almost all the chemical reactions, which take place inside organisms. Enzymes are made of proteins.The protein part of an enzyme is called apoenzyme.And there is non-protein part(Apoenzymes and non-protein parts together called Holoenzymes).This part is needed for starting reactions.Many enzymes require the presence of an inorganic ion or nonprotein organic molecule. They are called cofactors.


Properties of Enzymes

• When an enzyme and its substrate are joined, the bonds in substrate are weakened. This lowers the activation energy of the reaction because of that the reaction can take place in body tempurature more easi
• Number of enzymes are low because they are used temporairly and after reactions they left unchanged for that they can be used again and again.
• The names of enzymes usually end with the suffix -ase which is take from the substrate.For example Sucrose becomes Sucrase.
• Enzymes may catalyze reactions in reverse or forward.
• An enzyme can only do one kind of reaction