Regulation of Gene Expression

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Questions and Answers

Which process is primarily responsible for the lac operon in gene regulation?

  • Transcription of structural genes (correct)
  • Cell division
  • DNA replication
  • Protein translation

In the absence of lactose, what state is the lac operon in?

  • Induced
  • Activated
  • Repressed (correct)
  • Mutated

Which molecule acts as the inducer of the lac operon?

  • Lac repressor
  • Lactose (correct)
  • Glucose
  • RNA polymerase

Which enzyme is responsible for breaking down lactose in the lac operon?

<p>Beta-galactosidase (C)</p> Signup and view all the answers

Which part of the lac operon acts as an on/off switch for transcription?

<p>Operator (A)</p> Signup and view all the answers

Which enzyme is responsible for unwinding the DNA double helix during replication?

<p>DNA helicase (C)</p> Signup and view all the answers

During DNA synthesis, adenine (A) pairs with:

<p>Thymine (T) (A)</p> Signup and view all the answers

What is the primary enzyme responsible for DNA synthesis?

<p>DNA polymerase (A)</p> Signup and view all the answers

Which direction does DNA synthesis occur in?

<p>5' to 3' (C)</p> Signup and view all the answers

Which of the following is not required for DNA synthesis?

<p>Ribosome (D)</p> Signup and view all the answers

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