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BTEC Biology 3.1
Cells
Mrs Barnes
Y Dderwen
Assignment 3.1
• Students take the role of scientists working
for one of the labs that has taken part in the
Human Genome Project. Your task is to
produce an illustrated booklet for the public,
explaining the importance of the science
behind the Project.
• Students can work in small groups for the microscope
work, but produce their booklets individually.
• The booklet, when complete, will comprise a brief account
of how the functioning of an organism relates to the genes
in its cells. The first task here is to explain the location of
genetic material. Later, students will add diagrams to show
the organisation of cells into tissues and to show different
types of cell. Then they describe how genes work, how
those that are ‘switched on’ control the cell’s function, and,
working together as a whole, determine the characteristics
of the organism.
Objectives
• Identify a plant and an animal cell
• Identify the components of each cell
and label a diagram
• Describe the function of each cell
components
Pathology
• Cells are very small.
• They are the basic building blocks of all
animals and plants.
These photographs show cells seen
through a microscope.
These photographs show cells seen
through a microscope.
Animal Cell
Cheek cell
Plant Cell
Onion epidermis cell
These photographs show cells seen
through a microscope.
Plant Cell
Are 10 x the size of
animal cells
Task 1
• Draw and label an animal (and a plant cell)
• You need to include a table of the parts and
their function (so we only need 1 table if
they are both on the same sheet
A Plant and Animal Cell parts and
function
Table here
Animal
cell here
Plant
cell here
coursework
• Your poster must be neat, coloured in and
contain:
• Labelled diagram of plant cell
• Labelled diagram of animal cell
• Table of cell component functions
• When this is complete, and to an acceptable
standard you may complete the practical.
Examining a real cell
• We shall make a slide of onion epidermis
• Follow the instructions from the help sheet
• Draw a cell you can see and identify what you can see
• What is missing? Can you come up with a reason why?
Place a small drop of water on
a clean microscope slide.
Your teacher will slice through
an onion. Take off one of the
‘leaves’ of the onion using a pair
of forceps. Then, using the
forceps, carefully peel off a
small piece of inner onion skin,
or epidermis.
Place the onion epidermis in
the drop of water on the
microscope slide.
Use a mounted needle to
remove any folds in the onion
epidermis.
Gently lower a cover slip onto
the onion epidermis, taking care
not to trap any air bubbles under
the cover slip.
Place one drop of iodine solution
at one side of the cover slip.
Place a quarter of a piece of filter
paper at the other side of the
cover slip. This will draw the
stain under the cover slip so as to
stain the cells.