Biology Topic Practice

Electron Microscopy

Electron microscopes have revolutionized our understanding of cell structure by providing much higher resolution than light microscopes.

Why can't we see ribosomes with a light microscope?

What is Electron Microscopy?

"An electron microscope is a high-powered microscope that uses electron beams to achieve resolutions much higher than possible with light."

Question 1

What is the main advantage of an electron microscope over a light microscope?

Question 2

Which formula is used to calculate magnification?

Question 3

What does higher resolution mean when looking at cells?

Power of Electrons

Electron microscopes use a beam of electrons instead of light.

They have a much higher resolution (around 0.2nm) and higher magnification.

They allow us to see sub-cellular structures like mitochondria and chloroplasts in detail.

Exam Tip

Specimens for electron microscopy must be dead because the process happens in a vacuum.

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