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What are Enzymes?

  • Enzymes are proteins which catalyse (Speed up) Biochemical reactions in the cell. They are denatured at high temperatures.
  • Generally, Enzymes function in a narrow range of temperatures and pH. Each enzyme shows its highest activity at a particular temperature and pH called optimum temperature and optimum pH
  • With the increase in substrate concentration, the velocity of the enzymatic reaction rises at first. The reaction ultimately reaches a maximum velocity (Vmax) which is not exceeded by any further rise in the concentration of the substrate.
  • The activity of an enzyme is also sensitive to the presence of specific chemicals that bind to the enzyme.
  • Enzymes are substrate specific in their action.