Question 1

Which statement about differential staining is not true?


  A  

differential staining can distinguish between different organelles

  B  

differential staining can distinguish between types of cell


  C  

differential staining can distinguish between types of organism


  D  

differential staining is a common feature of electron microscopy

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Question 2

Which of the following best describes a microscope with high resolution?

  A  

the microscope can distinguish structures that are very close together

  B  

the microscope can view structures that are very small

  C  

the microscope is capable of high magnification

  D  

the microscope has an in-built eyepiece graticule


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Question 3

A prokaryotic cell that is 1 µm in diameter is magnified 50,000 times in an electron micrograph.

What is the diameter of the cell in the electron micrograph?

  A  

5 × 10-1 mm

  B  

5 × 100 mm

  C  

5 × 101 mm

  D  

5 × 102 mm

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Question 4

An eyepiece graticule has a scale with 100 divisions. A stage micrometer has a scale with 50 divisions, each of which is 0.040 mm apart.

Using a × 40 objective lens, the whole length of this stage micrometer scale lines up with 15 divisions of the eyepiece graticule.

What is the actual length of the 100 division scale of the eyepiece graticule?

  A  

1.3 mm

  B  

13 mm 

  C  

75 µm 

  D  

750 µm

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Question 5

A student was asked to use the scale bar shown to calculate the magnification of a cell on a photomicrograph.

Which method could the student use to calculate the magnification of the cell?

  A  

divide the diameter of the cell by the length of the scale bar, both measured in the same units of length

  B  

measure the diameter of the cell in millimetres, multiply by 2,000 and divide by the length of the scale bar measured in millimetres

  C  

measure the length of the scale bar in millimetres, convert to micrometres and divide by 2

  D  

measure the length of the scale bar in millimetres, convert to micrometres and multiply by 2

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Question 6

Which lengths are equivalent to 1 µm?

1 - 1,000 mm

2 - 0.001 nm

3 - 0.001 mm

4 - 1,000,000 nm

5 - 0.01 mm

6 - 1,000 nm

  A  

1 and 4

  B  

2 and 5

  C  

3 and 4

  D  

3 and 6

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Question 7

Pancreatic cells have a diameter of 35 µm. Red blood cells have a diameter of 7,000 nm.

Which statement is correct?

  A  

pancreatic cells are 5 times larger than red blood cells.


  B  

pancreatic cells are 50 times larger than red blood cells

  C  

pancreatic cells are 5 times smaller than red blood cells

  D  

pancreatic cells are 50 times smaller than red blood cells

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Question 8

Which cell structure can be seen only with an electron microscope?

  A  

cell wall


  B  

chromosome

  C  

nucleolus

  D  

ribosome

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Question 9

Plant cells are stained and then viewed through a light microscope.

Which structures would be clearly visible at a magnification of × 400?

  A  

chloroplast grana

  B  

lysosomes

  C  

nucleoli

  D  

ribosomes

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Question 10

A microscope has a resolution of 200 nm.

Which organelles would not be resolved using this microscope?

  A  

chloroplasts

  B  

lysosomes

  C  

mitochondria

  D  

ribosomes

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