Microsocpes

Question 1

What is the maximum mag and res for a light microscope

Answer 1

x1500 mag
200nm

Question 2

What is the maximum mag and res for tem

Answer 2

x500 000 mag
0.2 nm

Question 3

what is the maximum mag and res

Answer 3

x100 000 mag
10nm

Question 4

What does SEM stand for

Answer 4

Scanning electron microscope

Question 5

What does TEM stand for

Answer 5

Transmission electron microscope

Question 6

Calculation for image size

Answer 6

image size= mag x actual size

Question 7

Features of light microscopes

Answer 7

Cheap
Live specimen
Coloured image
Low mag
Low res
Inverted image
3 lenses

Question 8

Features of electron microscopes

Answer 8

Expensive
High mag
High res
Dead specimen
Black and White image
Shows subcellular organelles
Magnets instead of lenses

Question 9

Features of SEM

Answer 9

outside layer
3D image

Question 10

Features of TEM

Answer 10

inside image
2D image
the denser the area the more electrons absorbed which results in a darker image

Question 11

Features of laser confocal microscope

Answer 11

Laser fired at dead specimen
3D image
different depths are shown

Question 12

What are the 3 lenses

Answer 12

Objective
Condenser
Ocular

Question 13

What criteria does a cell drawing have

Answer 13

Title
Mag labelled
Straight lines
No arrow heads
Pencil
No crossing lines
No shading
Over 50% of the space provided
Correct proportions

Question 14

Why does the specimen need to be dead for an electron microscope

Answer 14

Because it is viewed in a vacuum

Question 15

Give 2 similarties of light and electron microscopes

Answer 15

2D images
can use dead specimen

Question 16

Some prokaryotes have an extra layer around the cell wall known as a ________

Answer 16

capsule