1.3 The Cell Part 4

Question 1

What are cell walls composed of?

Answer 1

multiple layers of cellulose fibers

Question 2

What is the purpose of a cell wall?

Answer 2

mechanical strength
structural support

Question 3

What do bacterial cell walls contain instead of cellulose?

Answer 3

peptidoglycan

Question 4

What does it mean to be gram positive?

Answer 4

bacteria that possess a thick layer of peptidoglycan in their cell wall and retain a violet stain

Question 5

What does it mean to be gram negative?

Answer 5

bacteria that possess a thing layer of peptidoglycan in their cell wall and do not retain a violet stain

Question 6

What does penicillin do?

Answer 6

interferes with the cell wall structure of gram positive bacteria

Question 7

What are light microscopes also known as?

Answer 7

compound microscopes

Question 8

What are the most common microscopes in order of magnification?

Answer 8

light
electron
transmission electron

Question 9

What microscope produces a 3D picture of the surface of an object?

Answer 9

scanning electron microscope

Question 10

What is required for a scanning microscope on the surface of an object?

Answer 10

thin film of gold or other metal