Plasma Membrane Structure Quiz
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Questions and Answers

What is the function of the plasma membrane?

  • Provides structural support to the cell
  • Facilitates cellular communication
  • Stores genetic information
  • Regulates the transport of materials entering and exiting the cell (correct)
  • How does the cell membrane appear under a light microscope?

  • A dense, multi-layered structure
  • A network of interconnected channels
  • An opaque, irregular shape
  • A thin, nearly transparent line surrounding the cell (correct)
  • What is the appearance of the cell membrane under a transmission electron microscope (TEM)?

  • Fibrous with a honeycomb-like pattern
  • Tri-laminar with two dense lines separated by a lucent intermediate zone (correct)
  • Smooth and featureless
  • Granular with irregular projections
  • What is the purpose of freeze-fracture in studying cell membranes?

    <p>To study the internal structure of biological samples, particularly cell membranes</p> Signup and view all the answers

    What happens during freeze-fracture?

    <p>The biological sample is rapidly frozen at extremely low temperatures and then fractured to study its structure</p> Signup and view all the answers

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