Microbial Cell Structure and Function Quiz
21 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the maximum magnification of a light microscope?

  • 1,000,000X
  • 10,000X
  • 100,000X
  • 1000X (correct)
  • What determines how easily cells can be seen in light microscopy?

  • Resolution
  • Refraction
  • Contrast (correct)
  • Magnification
  • Which type of microscope uses UV light and fluorescent substances to visualize cells or materials?

  • Dark-Field microscope
  • Phase-Contrast microscope
  • Transmission Electron microscope
  • Fluorescence microscope (correct)
  • What is the drawback of electron microscopes?

    <p>Lens and specimen are in a vacuum</p> Signup and view all the answers

    Which type of microscope depends on differences in refractive index and uses two beams of light to create a three-dimensional appearance of the specimen?

    <p>Differential Interference Contrast microscope</p> Signup and view all the answers

    What type of microscope uses special optics to amplify the difference between the refractive index of dense material and the surrounding medium?

    <p>Phase-Contrast microscope</p> Signup and view all the answers

    What is the principle that determines how easily cells can be seen in light microscopy?

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

    Which microscope uses a dark background and directs light toward the specimen at an angle to increase contrast?

    <p>Dark-Field microscope</p> Signup and view all the answers

    What is the maximum magnification of an electron microscope?

    <p>More than 100,000X</p> Signup and view all the answers

    What type of microscope uses electromagnetic lenses and electrons instead of light to magnify a million times?

    <p>Electron microscope</p> Signup and view all the answers

    What is the primary purpose of Gram staining?

    <p>To differentiate bacteria into two groups based on cell wall characteristics</p> Signup and view all the answers

    What distinguishes acid-fast staining from other staining methods?

    <p>It is used to detect Mycobacterium with high concentrations of mycolic acid in the cell wall</p> Signup and view all the answers

    What is the purpose of capsule staining?

    <p>To visualize the protective outer layer of certain bacteria</p> Signup and view all the answers

    What is the purpose of endospore staining?

    <p>To visualize dormant forms of certain bacteria</p> Signup and view all the answers

    What is the purpose of flagella staining?

    <p>To visualize the motility structures of bacteria</p> Signup and view all the answers

    What distinguishes fluorescent dyes and tags in staining?

    <p>Some dyes bind to structures in all cells</p> Signup and view all the answers

    What characteristic of Mycobacterium makes acid-fast staining necessary?

    <p>High concentrations of mycolic acid in the cell wall</p> Signup and view all the answers

    Why is heat used in endospore staining?

    <p>To facilitate uptake of the primary dye by endospores</p> Signup and view all the answers

    What is the purpose of India ink in capsule staining?

    <p>To create a dark background for better visualization of capsules</p> Signup and view all the answers

    What is the primary purpose of the Gram stain procedure?

    <p>To differentiate bacteria into two groups based on cell wall characteristics</p> Signup and view all the answers

    What distinguishes flagella staining from other staining methods?

    <p>It is used to visualize the motility structures of bacteria</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Browser