How Well Do You Know Enzymes?
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Questions and Answers

What are enzymes?

  • Lipids that act as biological catalysts
  • Carbohydrates that act as biological catalysts
  • Proteins that act as biological catalysts (correct)
  • Nucleic acids that act as biological catalysts

    • How much can enzymes increase reaction rates by?

  • A factor of 100 to 1000 over uncatalyzed reactions
  • A factor of 1000 to 10,000 over uncatalyzed reactions (correct)
  • A factor of 10,000 to 100,000 over uncatalyzed reactions
  • A factor of 10 to 100 over uncatalyzed reactions

    • How are enzymes named?

  • Using a long name for everyday use and a systematic name based on their class and subgroup
  • Using a short name for everyday use and a systematic name based on their class and family
  • Using a short name for everyday use and a systematic name based on their class and subgroup (correct)
  • Using a long name for everyday use and a systematic name based on their class and family

    • How many major classes are enzymes classified into based on their biochemical properties?

    <p>6</p> Signup and view all the answers

    What is an active site of an enzyme?

    <p>An area where substrates bind and catalysis occurs</p> Signup and view all the answers

    What are cofactors?

    <p>Non-protein substances required for enzyme activity</p> Signup and view all the answers

    How do enzymes work?

    <p>By binding to substrates to form an enzyme-substrate complex, going through a transition state, forming an enzyme-product complex, and finally separating</p> Signup and view all the answers

    Study Notes

    • Enzymes are proteins that act as biological catalysts, increasing the rate of reactions without being consumed in the process.

    • Enzymes can increase reaction rates by a factor of 103 to 108 over uncatalyzed reactions.

    • Enzymes are named using a short name for everyday use and a systematic name based on their class and subgroup.

    • Enzymes are classified into six major classes based on their biochemical properties: oxidoreductases, transferases, hydrolases, lyases, isomerases, and ligases.

    • Enzymes have an active site that contains amino acid side chains for substrate binding and catalysis, and its shape determines enzyme specificity.

    • Enzyme-catalyzed reactions are highly efficient, with turnover numbers varying between 0.5 to 10000 per second.

    • Enzymes exhibit chemical specificity based on group specificity, absolute specificity, and stereochemical/geometric specificity.

    • Cofactors are non-protein substances required for enzyme activity, and the combination of the apoenzyme and cofactor forms the holoenzyme.

    • Enzymes work by binding to substrates to form an enzyme-substrate complex, going through a transition state, forming an enzyme-product complex, and finally separating.

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    Description

    Take this quiz to test your knowledge on enzymes and their functions in biological systems. From their classification to their active sites and chemical specificity, this quiz will challenge your understanding of these important biological catalysts. Get ready to dive into the world of enzymes and discover how they increase the rate of reactions without being consumed in the process.

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