Enzymes and Gene Regulation in Microbiology
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Questions and Answers

Which type of enzyme is always present in a cell regardless of the presence of a substrate?

  • Constitutive enzyme (correct)
  • Specialized enzyme
  • Inducible enzyme
  • Generalized enzyme
  • What type of enzyme is expressed only in the presence of its corresponding substrate?

  • Constitutive enzyme
  • Specialized enzyme
  • Generalized enzyme
  • Inducible enzyme (correct)
  • What is the main characteristic of generalized transduction?

  • Always involves a plasmid
  • Transfer of specific host genes during phage assembly
  • Random packing of bacterial DNA fragments inside phage heads (correct)
  • Occurs only in eukaryotic cells
  • In specialized transduction, what is transferred during phage assembly?

    <p>Specific host genes</p> Signup and view all the answers

    An F pilus is essential for:

    <p>Chromosome transfer by conjugation</p> Signup and view all the answers

    Study Notes

    Enzymes

    • Constitutive enzymes are always present and expressed in a cell, regardless of the presence of a substrate.
    • Inducible enzymes are only expressed when their corresponding substrate is present.

    Transduction

    Generalized Transduction

    • Involves random packing of bacterial DNA fragments inside phage heads during phage assembly.

    Specialized Transduction

    • Involves the transfer of specific host genes during phage assembly.

    Conjugation

    • F pilus is essential for chromosome transfer by conjugation.

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    Description

    Understand the difference between constitutive and inducible enzymes, and distinguish between generalized and specialized transduction in microbiology.

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