Please enable JavaScript.
Coggle requires JavaScript to display documents.
Enzymes, download - Coggle Diagram
Enzymes
Catalysis: Substances that speed up the reaction that occurs in cells because they are so slow. Biological catalysts are usually proteins called enzymes.
Only a few molecules can pass the activation energy at normal temperatures and they have insufficient kinetic energy for activation so the reaction is slow. If the weather got hotter, molecules could overcome activation energy and speed up the reaction but it would result in protein denaturation. So enzymes lower the energy barrier and the reaction occurs faster.
Factors that affect enzyme activity: Inhibitors, , extreme change in pH levels, water concentration, activators and extreme change in temperature
-
Activation Energy: Biochemical reactions only happen after the reactants are pushed over the energy barrier by a little amount of added energy. The added energy is called activation energy.
Enzyme Models:
Lock and key model: It is also called Fisher's theory. It assumes that the active site of an enzyme and the substrate are shaped equal. The substrate fits perfectly into the active site of the enzyme according to the Lock and Key model.
Induced-Fit model: According to this model, an enzyme changes until a substrate can bind with it.
-
-
Enzyme Types:
Holoenzymes: Complex enzymes that are made of cofactors, coenzymes and apoenzymes.
-
-
-
Parts of an enzyme: Active Site, which is where the substrate molecule binds to, Co-enzyme (organic compound) which helps the enzyme activity, substrate, which is the reactant and it is where the active site binds to and co-factor which is an inorganic compound that also helps the enzyme activity.
-
