BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Enzymes speed the reaction, or allow it to occur at lower energy levels and, once the reaction is complete, they are again available. In other words, they are not used up by the reaction and can be re-used.

Detailed explanation-2: -Enzymes are not reactants and are not used up during the reaction. Once an enzyme binds to a substrate and catalyzes the reaction, the enzyme is released, unchanged, and can be used for another reaction. This means that for each reaction, there does not need to be a 1:1 ratio between enzyme and substrate molecules.

Detailed explanation-3: -Enzymes serve as catalysts to many biological processes, and so they are not used up in reactions and they may be recovered and reused.

Detailed explanation-4: -One enzyme can be used for many different types of chemical reactions. Enzymes are highly specific for the substrate. So they cannot be used for different types of reactions. As lock and key model assumes that a high degree of similarity between the shape of substrate and the geometry of the binding site of the enzyme.

Detailed explanation-5: -Enzymes are proteins that speed up reactions by reducing the activation energy. Each enzyme typically binds only one substrate. Enzymes are not consumed during a reaction; instead they are available to bind new substrates and catalyze the same reaction repeatedly.