BMS 301 Molecular Biology: Control of Gene Expression Quiz
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Questions and Answers

What is the main focus of the chapter on control of gene expression?

  • The mechanisms that enable selective gene expression in different cell types (correct)
  • The synthesis of different sets of RNAs and proteins in specialized cells
  • The differences between mammalian neuron and liver cell genomes
  • The common processes and gene products in all cells

    • Which type of proteins control transcription by binding to specific DNA sequences?

  • Metabolic enzymes
  • Structural proteins of chromosomes
  • Transcription regulators (correct)
  • DNA repair enzymes

    • What is a characteristic of the gene product tyrosine aminotransferase mentioned in the text?

  • It is abundant in all cell types
  • It is a DNA repair enzyme
  • It is highly expressed in specialized cells (correct)
  • It is a structural protein of chromosomes

    • Which mechanisms create and maintain specialized cell types according to the text?

    <p>Mechanisms that reinforce cell memory in plants and animals</p> Signup and view all the answers

    What are some gene products that are common to all cells according to the text?

    <p>Ribosomal proteins and RNAs</p> Signup and view all the answers

    What is the typical percentage of genes expressed by a human cell at any one time?

    <p>30-60%</p> Signup and view all the answers

    How can a cell control the proteins it makes?

    <p>Transcriptional control and post-translational control</p> Signup and view all the answers

    What do transcription regulators recognize in the DNA?

    <p>Cis-regulatory sequences</p> Signup and view all the answers

    Which structural motifs do many protein-DNA recognition motifs use to bind to the major groove of DNA?

    <p>α helices or β sheets</p> Signup and view all the answers

    What does dimerization of transcription regulators do?

    <p>Increases the affinity and specificity of binding</p> Signup and view all the answers

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