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Questions
Q1.
(a) The diagram shows a light microscope.
(i) Complete the sentence by putting a cross (
The focusing wheel is used to
) in the box next to your answer.
(1)
A decrease the magnification
B increase the amount of light
C move the slide on the stage
D produce a clear, detailed image
(ii) The diagram shows an animal cell as seen using a light microscope.
The length of this cell before it is magnified is 0.005 mm.
Calculate the length of the image after it has been magnified x400.
(2)
.............................................................................................................................................
.
(b) An electron microscope can be used to see mitochondria inside cells.
State the function of mitochondria in a cell.
(1)
.............................................................................................................................................
.
(c) The diagrams show two cells taken from a plant.
(i) Complete the sentence by putting a cross (
Root hair cells take in water by
) in the box next to your answer.
(1)
A active transport
B osmosis
C respiration
D transpiration
(iii) Describe the function of the chloroplasts in a leaf cell.
(2)
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.
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.
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.
(Total for Question is 7 marks)
Q2.
The photograph shows a blood smear from a healthy person.
(i) Name the two types of blood cells, X and Y, shown in the photograph.
(2)
.............................................................................................................................................
.
.............................................................................................................................................
.
(ii) Complete the sentence by putting a cross ( ) in the box next to your answer.
The function of the cells labelled X is to
(1)
A engulf bacteria
B produce antigens
C transport carbon dioxide
D transport oxygen
(iii) Measure the diameter of the cell labelled Z.
(1)
diameter = ........................................................................... mm
(iv) The cell labelled Z is magnified × 900.
Calculate the actual diameter of the cell labelled Z.
(2)
actual diameter = ................................................................................. µm
Q3.
Cells
The photographs show a 350 year-old light microscope and a modern light microscope.
(a) (i) Suggest how the modern light microscope helps us to see cells in greater detail than
the 350 year-old microscope.
Use the photographs to help you.
(2)
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(ii) Complete the sentence by putting a cross ( ) in the box next to your answer.
Structures in bacterial cells are so small they can only be seen using
(1)
A
a hand lens
B
an electron microscope
C
a light microscope
D
a camera
(iii) Complete the sentence by putting a cross ( ) in the box next to your answer.
Bacterial cells are similar to animal cells because they contain a
(1)
A
cell membrane
B
cell wall
C
plasmid
D
nucleus
(b) The photograph shows an animal cell magnified using a modern light microscope.
(i) The magnified animal cell has a diameter of 30 mm.
The actual diameter of the animal cell is 0.1 mm.
Calculate how many times the animal cell has been magnified.
(2)
........................................................... times
(ii) State the function of the nucleus in the animal cell.
(1)
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(c) Plant cells have large vacuoles.
Describe the functions of the large vacuole in a plant cell.
(2)
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(Total for question = 9 marks)