Cell Ultra-structure

Question 1

What do electron microscopes use instead of light?

Answer 1

An electron beam

Question 2

What are the two main types of electron microscopes?

Answer 2

Transmission electron microscope (TEM)

Scanning electron microscope (SEM)

Question 3

What does a Transmission electron microscope (TEM) do? What does it show?

Answer 3

It sends a beam of electrons through a thin section of the specimen. This shows the internal structure of the specimen in great detail.

Question 4

What does a Scanning electron microscope (SEM) use?

Answer 4

It uses a beam of electrons to provide a surface view of the specimen

Question 5

What view does a Scanning electron microscope (SEM) show?

Answer 5

A surface view of the specimen

Question 6

What view does a Transmission electron microscope (TEM) show?

Answer 6

The internal structure of the specimen in great detail.

Question 7

Define ultrastructure

Answer 7

It is the detail of a structure as seen using an electron microscope

Question 8

What magnification can electron microscopes give?

Answer 8

Magnifications of 250,000 and higher.

Question 9

What can electron microscopes produce?

Answer 9

Very clear images

Question 10

What are electron microscopes ideal for?

Answer 10

They are ideal for observing very small structures.