Catalyst and Enzyme :Similarities and Dissimilarities

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 Enzymes are biocatalysts. 

Catalyst are those which accelerat the rate of reaction without affected itself. 
Enzymes is a substance that catalyse biochemical reactions. 

Similarties

  • They do not initiate the reaction. 
  • They constitute short -lived complexes by reacting with substrate molecules. 
  • Both catalyse reversible reactions. 
  • They increase the rate of reaction by lowering the activation energy. 
  • They have no effect on equillibrium. 
  • Both are effective in very small amounts. 
  • Their quantity and quality remains unchanged in the reaction.
  • The function of both catalyst and enzyme is to hasten the process in either direction. 

Dissimilarities 

  • Chemical nature 
Enzymes are proteinous in nature while inorganic catalyst are small mineral ion. 
  • Control 
Enzyme activity can be controlled by certain regulators which can change the conformation of enzymes,catalyst are not controlled by regulators. 
  • Effect of external factors 
Enzymes are high sensitive to pH and temperature changes. Whereas catalyst are not affected much  by factors like pH and temperature. 
  • Nature of actions catalysed 
Enzymes can catalysed only specific reactions wheras catalyst can catalyze diverse reaction 
  • Molecular weight 
Enzymes are of high molecular weight while catalyst are of low molecular weight. 
  • Efficiency 
Enzymes are more efficient while inorganic catalyst are less efficient. 
  • Type of reaction catalysed 
Enzymes catalyse biological reaction whereas inorganic catalyst catalyze non-biological reaction. 



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