Continuous Culture Device and Turbidostat Quiz
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Questions and Answers

What is the function of a turbidostat in a bacterial culture?

  • To measure the absorbance using a photocell
  • To remove bacteria from the culture chamber
  • To regulate the flow rate of media to maintain a predetermined cell density (correct)
  • To introduce limiting nutrients to control growth rates

    • Who discovered the helical structure of DNA using x-ray crystallography?

  • Phoebus A.T. Levine
  • James Watson
  • Frederick Miescher
  • Rosalind Franklin (correct)

    • Which scientists revealed the dimensional structure of the DNA molecule?

  • Phoebus A.T. Levine and Rosalind Franklin
  • James Watson and Francis Crick (correct)
  • Rosalind Franklin and James Watson
  • Frederick Miescher and Phoebus A.T. Levine

    • What is the primary determinant of the information contained in DNA?

    <p>The sequence of letters along the helical structure</p> Signup and view all the answers

    What differentiates RNA from DNA in terms of structure?

    <p>RNA has a single-stranded structure and contains ribose sugar instead of deoxyribose</p> Signup and view all the answers

    How does a turbidostat differ from a chemostat?

    <p>A turbidostat has no limiting nutrients, whereas a chemostat adds fresh media continuously</p> Signup and view all the answers

    What does the twisted double-stranded helical structure of DNA resemble?

    <p>&quot;Spiral staircase&quot;</p> Signup and view all the answers

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