1. State the maximum magnification that can be achieved by a light microscope and a transmission electron microscope.
Select your answers from the list below.
10x 40x 100x 400x 1500x 25 000x 50 000x 500 000x
light microscope ................................... x
transmission electron microscope ................................... x [Total 2 marks]
2. Describe what is meant by the term resolution.
..................................................................................................................................
..................................................................................................................................
..................................................................................................................................
.................................................................................................................................. [Total 2 marks]
14. The figure below is a diagram of an animal cell as seen using a transmission electron microscope.
(i) Name the structures of the cell labelled A, B, C and D.
A ....................................................................
B ....................................................................
C ....................................................................
D .................................................................... [4]
(ii) Structures C and E are examples of the same organelle.
Suggest why E looks so different to C.
.........................................................................................................................
.........................................................................................................................
.........................................................................................................................
......................................................................................................................... [2]
(iii) Calculate the actual length of structure C.
Show your working and give your answer in micrometres (µm).
Answer = .................................................. µm [2] [Total 8 marks]
42. The table below compares features of typical eukaryotic and prokaryotic cells.
(i) Complete the table by placing one of the following, as appropriate, in each empty box of the table.
• a tick ()
• a cross ()
• the words ‘sometimes present’
Some of the boxes have been completed for you.
|
eukaryotic cell
|
prokaryotic cell
|
cell wall
|
sometimes present
|
|
nuclear envelope
|
|
|
Golgi apparatus
|
|
|
ribosomes
|
|
|
flagellum
|
sometimes present
|
|
(ii) Outline the roles of the Golgi apparatus and the ribosomes.
Golgi apparatus ..............................................................................................
.........................................................................................................................
......................................................................................................................... [4]
Ribosomes ......................................................................................................
......................................................................................................................... [2]
[Total 6 marks]
57. The diagram below is an electron micrograph of part of a cell from a human liver.
This cell is responsible for converting glucose in the body into glycogen for storage. The glycogen can be seen as granules in the cytoplasm.
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