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



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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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