Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BIOLOGY A LEVEL > Cell structure 2.1.1 > Flashcards

Cell structure 2.1.1 Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

What does magnification mean?

A

How many times larger an image appears relative to the size of the objects actual size

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What does resolution mean?

A

The ability of an optical system to distinguish between two adjacent points

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the formula for magnification?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the maximum effective magnification of a light microscope?

A

x1,500

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the maximum effective magnification of a transmission electron microscope?

A

x500,000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the maximum resolution of a light microscope?

A

200nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the maximum resolution of a transmission electron microscope?

A

0.1nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the decreasing order of units used to measure cells?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the maximum effective magnification of a scanning electron microscope?

A

x200,000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the maximum resolution of a scanning electron microscope?

A

between 3 and 10nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the advantages of a light microscope?

A
  • relatively cheap
  • easy to use
  • portable
  • ability to use on whole living specimens as well as sectioned
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the advantages of a transmission scanning microscope?

A
  • High magnification and resolution which produces detailed images of cells/organelles
  • Allows internal structures of cells/organelles to be seen
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the advantages of a scanning electron microscope?

A
  • Produces a 3D image
  • Reveals details of contours and cell/tissue arrangements
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the limitations of a light microscope?

A
  • Low magnification and resolution which means that many organelles cannot be seen
  • Samples often need staining to help distinguish different features
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the limitations of a transmission scanning electron?

A
  • The specimen has to be chemically fixed by dehydration and staining which is why it cannot be used on living samples
  • need a great deal of skill and training to use
  • are large and very expensive
  • Image cant be viewed directly
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the limitations of a scanning electron microscope?

A
  • Cannot be used on living samples
  • are large and very expensive
  • need a great deal of skill and training to use
  • only reveal the surface detail or section of a specimen
  • Images cant be viewed directly
17
Q

Label the microscope.

A

Labels:

  1. Eyepiece
  2. Body tube
  3. High power objective lens
  4. Low power objective lens
  5. Stage
  6. Condenser
  7. Mirror
  8. Base
  9. Coarse adjusment screw
  10. Fine adjustment screw
  11. Arm
18
Q

Label the light diagram of a light microscope.

A

Labels:

  1. Eye
  2. Objective lens
  3. Specimen
  4. Condenser lens
  5. Eyepiece
19
Q
A

BIOLOGY A LEVEL (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions