The catalytic action of an enzyme is:  

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DSSSB PGT Chemistry (Female) Official Paper (Held On: 06 Jul, 2018 Shift 1)
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  1. Highly specific 
  2. Non specific 
  3. Does not depend on the nature of substrate 
  4. Heterogeneous 

Answer (Detailed Solution Below)

Option 1 : Highly specific 
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CONCEPT:

Catalytic Action of Enzymes

  • Enzymes are biological catalysts that speed up chemical reactions in living organisms.
  • The catalytic action of enzymes is highly specific, meaning that each enzyme is designed to act on a specific substrate or a group of closely related substrates.
  • This specificity is due to the unique three-dimensional structure of the enzyme, particularly the active site where the substrate binds.
  • The enzyme-substrate complex is formed at the active site, which facilitates the reaction and lowers the activation energy required for the process.

EXPLANATION:

  • Enzymes exhibit high specificity because of their structural compatibility with the substrate.
  • For instance, an enzyme like amylase only acts on starch and not on proteins or fats.
  • Options such as "non-specific" or "does not depend on the nature of substrate" are incorrect because enzymes are highly selective and their function is dependent on the specific substrate they bind to.
  • The term "heterogeneous" refers to systems involving different phases and is not related to enzyme specificity.

Therefore, the correct answer is Highly specific.

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