Enzymes


 
 
Concept Explanation
 

Enzymes

  • All the reactions in your body are helped along by enzymes - special proteins that can speed up a reaction without being used up in the process. Without the help of enzymes, many reactions would occur too slowly to maintain life.
  • There are over 700 enzymes in the human body and each one in specific to one particular chemical reaction. Scientists use the 'lock and key' model to explain how enzymes work.
  • The model shows that a large molecules has been split into smaller ones. This is an example of a catabolic reaction. The opposite reaction can also occur with other enzymes, where smaller molecules are joined to form a larger one. This type of reaction is called as anabolic reaction.
  • Each enzyme has a particular shape that allows it to attach to a specific molecule or molecules, known as the substrate. The substrate is what will be changed by the chemical reaction. In a reaction, the enzyme and the substrate join together and the substrate is then changed in some way.                                                    
  • Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    Each enzyme has a particular shape that allows it to attach to a specific molecule or molecules, known as ____________

    Right Option : B
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    Explanation
    Question : 2

    The model that represents the binding of enzyme with substrate is called as ______________________.

    Right Option : B
    View Explanation
    Explanation
    Question : 3

    Enzymes enhances the rate of reaction by _________________

    Right Option : A
    View Explanation
    Explanation
     
     
     
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