Chapter 1

Question 1

What stains DNA?

Answer 1

Acetic orcein

Question 2

What stains cytoplasm?

Answer 2

Eosin

Question 3

What stains lipids?

Answer 3

Sudan red

Question 4

What stains plant cell walls?

Answer 4

Iodine (yellow)

Question 5

What stains starch granules?

Answer 5

Iodine (dark purple)

Question 6

What is the magnification of a light microscope?

Answer 6

x1500

Question 7

What is the magnification of a laser scanning microscope?

Answer 7

x1500

Question 8

What is the magnification of a scanning electron microscope?

Answer 8

x200000

Question 9

What is the magnification of a transmission electron microscope?

Answer 9

x2000000

Question 10

What is the resolution of a light microscope?

Answer 10

200nm

Question 11

What is the resolution of a laser scanning microscope?

Answer 11

160nm

Question 12

What is the resolution of a scanning electron microscope?

Answer 12

20nm

Question 13

What is the resolution of a transmission electron microscope?

Answer 13

0.1nm

Question 14

What are advantages of light microscopes?

Answer 14

• cheap
• easy to use
• can study whole living organisms

Question 15

What is a disadvantage of laser scanning microscopes?

Answer 15

• slow process (takes time to see the image)

Question 16

What are disadvantages of electron microscopes?

Answer 16

• expensive
• can only study dead cells/ organisms
• requires training to use

Question 17

What are disadvantages of light microscopes?

Answer 17

• low magnification
• low resolution

Question 18

What are advantages of laser scanning microscopes?

Answer 18

• depth in image
• can show coloured images