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What is the fundamental purpose of staining in light microscopy?
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5. Cell Components
Microscopes
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The Transmission Electron Microscope (TEM) uses a beam of what instead of light to see the cell's ultrastructure?
A
Protons
B
Electrons
C
Neutrons
D
Photons
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Understand the basic principle of a Transmission Electron Microscope (TEM): it is used to view the ultrastructure of cells by passing a beam through the specimen.
Recognize that TEMs require a source that can provide a much smaller wavelength than visible light to achieve higher resolution.
Recall that electrons have much shorter wavelengths compared to visible light, allowing them to resolve much finer details in the specimen.
Identify that the beam used in a TEM is composed of electrons, which are negatively charged subatomic particles.
Conclude that the correct answer to the question is 'Electrons', as they are used in TEMs to visualize the ultrastructure of cells.
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