Ch. 3 Observing Microorganisms through a Microscope

3.1 How many nanometers is 10 micrometers?

3.2 Through what lenses does light pass in a compound microscope?

3.3 What does it mean when a microscope has a resolution of 0.2 nm?

3.5 Why do electron microscopes have greater resolution than light microscopes?

3.6 For what is TEM used? SEM? Scanned-probe micrscopy?

3.7 Why doesn't a negative stain color a cell?

3.8 Why is fixing necessary for most staining procedures?

Analysis Question #1

In a Gram stain, a step could be omitted and still allow differentiation between gram-positive and gram-negative cells. What is it?