Chapter 1: Preview of the Cell and Early Microscopy
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Questions and Answers

Who first isolated DNA and called it nuclein?

  • Friedrich Miescher (correct)
  • Wilhelm Roux
  • Beadle
  • Morgan
  • Which scientists connected specific traits to chromosomes in Drosophila melanogaster?

  • Morgan, Bridges, & Sturtevant (correct)
  • Walther Flemming
  • August Weismann
  • Beadle & Tatum
  • Who proposed the chromosome theory of heredity?

  • Friedrich Miescher
  • Beadle & Tatum
  • Morgan, Bridges, & Sturtevant (correct)
  • Wilhelm Roux & August Weismann
  • Which concept states that each gene is responsible for the production of a single protein?

    <p>One gene-one enzyme concept</p> Signup and view all the answers

    What process did Walther Flemming name when he saw threadlike bodies in the nucleus?

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

    What technique is used to move proteins, DNA, or RNA molecules through a medium based on size and charge?

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

    Which method helps identify the composition and identity of a sample by converting components into ions?

    <p>Mass spectrometry</p> Signup and view all the answers

    What is the main purpose of centrifugation in biochemistry?

    <p>Isolating different structures and macromolecules</p> Signup and view all the answers

    What role did Gregor Mendel play in the advancement of genetics?

    <p>Laid the foundation for understanding hereditary factors</p> Signup and view all the answers

    Which method is crucial for tracing the metabolic fate of specific atoms and molecules?

    <p>Mass spectrometry</p> Signup and view all the answers

    In electrophoresis gel movement, why do long DNA fragments move slower in areas with small pores?

    <p>Small pores inhibit the movement of long DNA fragments</p> Signup and view all the answers

    What was the main limitation of the microscope used by the individual who made early observations of cells?

    <p>Low magnification power</p> Signup and view all the answers

    Which scientist co-authored a paper emphasizing the descriptive nature of cell biology?

    <p>Theodor Schwann</p> Signup and view all the answers

    Which process supports the cell theory and refutes spontaneous cell generation?

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

    Who demonstrated that fermentation is a chemical reaction?

    <p>Justus von Liebig</p> Signup and view all the answers

    What did Wohler's experiment prove about living and non-living things?

    <p>All matter follows biochemical processes</p> Signup and view all the answers

    What did Spirulina platensis contribute to the field of biology?

    <p>Recognition for its nutritional value</p> Signup and view all the answers

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