Bacterial Genetics and Biotechnology Chapter 8 Quiz
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Questions and Answers

What is the purpose of regulating gene expression in bacteria?

  • To decrease the rate of DNA replication
  • To increase mutations for genetic diversity
  • To accelerate the process of translation
  • To save cell energy by only producing necessary proteins (correct)

    • Which of the following is NOT a level of gene regulation in bacteria?

  • DNA modification
  • Regulation by sRNAs
  • Ribosomal RNA replication (correct)
  • Protein Post-translational modification

    • Which proteins are considered constitutive in bacteria?

  • Regulatory proteins
  • DNA-binding proteins
  • DNA repair enzymes
  • RNA polymerase (correct)

    • What do some microbes do to activate or disable a particular gene?

    <p>Alter the DNA sequence</p> Signup and view all the answers

    What is the function of autoinducers in bacterial gene regulation?

    <p>Turn on genes for group behaviors</p> Signup and view all the answers

    How do bacteria sense changes in cell density?

    <p>Through autoinducers</p> Signup and view all the answers

    Which process can help bacteria adjust to changing environmental conditions?

    <p>Regulation of gene expression</p> Signup and view all the answers

    What is the role of Quorum Sensing in regulating gene expression in bacteria?

    <p>Regulating gene expression based on cell population density</p> Signup and view all the answers

    What is a mutation in the context of bacterial gene expression?

    <p>A change in DNA sequence</p> Signup and view all the answers

    What is one way bacteria regulate protein levels post-translationally?

    <p>Modifying protein activity or folding</p> Signup and view all the answers

    Which mechanism reduces the frequency of errors during DNA replication in bacteria?

    <p>DNA repair mechanisms</p> Signup and view all the answers

    How can genetic changes bring about new traits or functions in bacteria?

    <p>Via horizontal gene transfer</p> Signup and view all the answers

    What type of mutation results in a frameshift, causing the encoded peptide sequence to be different from that point onward?

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

    Which type of mutation typically results in a nonfunctional MEERKAT protein, acting like a 'knock-out' mutation?

    <p>Insertions/Deletions</p> Signup and view all the answers

    In the context of mutations, what outcome is associated with an inversion of coding genes?

    <p>Missense Mutations</p> Signup and view all the answers

    If mutant 2 experiences a reversion, what might this reversal look like?

    <p>A deletion of a base leading to a frameshift mutation</p> Signup and view all the answers

    Which kind of mutation can result in inactivating the gene product, similar to a null mutation?

    <p>Nonsense Mutation</p> Signup and view all the answers

    Considering DNA repair mechanisms and replication accuracy, why are some mutations still passed on to daughter cells?

    <p>DNA repair does not fix all mistakes before the next round of replication</p> Signup and view all the answers

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