Lecture 1: Cell Theory and Microscopy

Question 1

What does cell theory state?

Answer 1

• All organisms are composed of one or more cells
• Cells are the smallest unit of life, forming the basis of organisation of all living organisms
• Cells arise only by division of a pre-existing cell

Question 2

What is the difference between magnification and resolution?

Answer 2

Magnification is a measure of how enlarged the image is whereas resolution is the ability to discriminate parts of the image.

Question 3

What is the limit of resolution and magnification of light microscopy?

Answer 3

0.2um and 1000x