Activation energy for the acid catalysed hydrolysis of sucrose is

biomolecules
cbse

#1

Activation energy for the acid catalysed hydrolysis of sucrose is 6.22 kJ ${{mol}^{-1}}$ while the activation energy is only 2.16 kJ ${{mol}^{-1}}$ when hydrolysis is catalysed by the enzyme sucrose. Explain.


#2

Enzymes are the essential biological catalysts which are needed to catalyse biochemical reactions. Enzymes are needed only in small quantities for the progress of a reaction. Like chemical catalysts, enzymes reduces the magnitude of activation energy by providing alternative pathway, e.g. hydrolysis of sucrose, the enzyme sucrose reduces the activation energy from 6.22 k] ${{mol}^{-1}}$ to 2.15 kJ ${{mol}^{-1}}$. Thus, enzyme catalysed reactions occur at a much faster rate.