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Questions and Answers
What is the biggest advantage of an electron microscope?
What is the biggest advantage of an electron microscope?
- It provides high magnification and resolution. (correct)
- It is relatively inexpensive.
- It can be used to examine living material.
- It is widely available to all biologists.
Why do scientists question the usefulness of electron microscope images?
Why do scientists question the usefulness of electron microscope images?
- Because they are not detailed enough.
- Because the images are too large.
- Because the tissue is dead and heavily processed. (correct)
- Because they are too expensive to obtain.
What is required to operate an electron microscope?
What is required to operate an electron microscope?
- A constant source of electricity. (correct)
- A constant source of heat.
- A constant source of light.
- A constant source of water.
Why are electron microscopes typically kept in a separate room?
Why are electron microscopes typically kept in a separate room?
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What is a limitation of electron microscopes in terms of access?
What is a limitation of electron microscopes in terms of access?
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Why must specimens be examined in a vacuum in an electron microscope?
Why must specimens be examined in a vacuum in an electron microscope?
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Study Notes
Electron Microscope: Advantages
- Provides higher magnification and resolution than a light microscope, allowing for more detailed observation
- Enables discovery of new structures inside cells and cell organelles, enhancing understanding of their function
- Reveals complicated structures within cell organelles
Electron Microscope: Disadvantages
- Requires specimens to be examined in a vacuum, making it impossible to observe living material
- Specimens must be dead, sliced thinly, treated with strong chemicals, and placed in a vacuum before examination, questioning image validity
- Very expensive to purchase and maintain
- Requires a large, dedicated space with controlled temperature, pressure, and internal vacuum
- Needs a constant electricity supply
- Limited accessibility for most biologists, as they are typically only available in top research laboratories
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