History of Microscopes and Cell Theory Quiz
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Questions and Answers

Who invented the first compound microscope in 1595?

  • Robert Hooke
  • Antoni van Leeuwenhoek
  • Isaac Newton
  • The Janssens (correct)
  • What did Robert Hooke observe under the microscope in 1665?

  • Animalcules
  • Bacteria
  • Protozoa
  • Cork cells (correct)
  • Which scientist used a single lens microscope to observe bacteria, sperm, and unicellular protozoa?

  • Robert Hooke
  • The Janssens
  • Antoni van Leeuwenhoek (correct)
  • Isaac Newton
  • What is the maximum magnification range of light microscopes?

    <p>1000-2000x</p> Signup and view all the answers

    Who proposed that all plants and animals are composed of cells, contributing to the development of cell theory?

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

    Which technique uses a laser to concentrate light into a specimen, allowing for the study of cells at the molecular level?

    <p>Confocal microscopy</p> Signup and view all the answers

    Which aspect of light microscopes is improved by using staining techniques?

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

    What is the limiting factor for the resolution of a light microscope?

    <p>$0.2$ um (micrometers)</p> Signup and view all the answers

    What is the resolution of a scanning electron microscope (SEM) when imaging cell structures?

    <p>20 nm</p> Signup and view all the answers

    Which microscopy technique allows the study of living cells without killing them using GFP technology?

    <p>Fluorescence microscopy</p> Signup and view all the answers

    What important observation did Robert Brown make in 1833 that contributed to cell knowledge?

    <p>He identified the nucleus as an important cell structure.</p> Signup and view all the answers

    Which technique is specifically designed to improve image quality by enhancing contrast between internal structures using fluorescent substances?

    <p>Staining techniques</p> Signup and view all the answers

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