Methods of Studying Cells

Question 1

Name the 3 types of microscope

Answer 1

Light Microscope
Scanning Electron Microscope
Transmission Electron
Microscope

Question 2

define magnification

Answer 2

Magnifi cation is how much bigger the image is compared to the original object viewed with the naked eye

Question 3

Magnification formula

Answer 3

(size of image)/(size of object)

Question 4

define resolution

Answer 4

how well a microscope distinguishes between two

points that are close together.

Question 5

what does Cell fractionation do?

Answer 5

separate organelles.

Question 6

describe the types of Cell fractionation

Answer 6

Homogenisation - grinding cells release the organelles into solution
Filtration - separates organelles & debris
Ultracentrifugation - using a centrifuge the organelles are
separated out in order of mass

Question 7

3 types of a microscope - medium

Answer 7

Light Microscope - light beam
Scanning Electron Microscope - electron beam
Transmission Electron
Microscope - electron beam

Question 8

3 types of a microscope - dimensions

Answer 8

Light Microscope - 2D
Scanning Electron Microscope - 3D
Transmission Electron
Microscope - 2D

Question 9

3 types of a microscope - in order of increasing magnitude and best resolution

Answer 9

Light Microscope
Scanning Electron Microscope
Transmission Electron
Microscope