National 4/5 Biology
Unit 1: Cell Biology
Section a: Cell Structure and
Function
What do you remember?
A
B
C
D
What are we learning today?
• We are learning to:
recognise the difference between a plant
and an animal cell
• Success criteria:
– I can name the structures of plant and animal cells
– I can state the functions of the structures of a plant
and animal cell
– I can recognise diagrams and explain the differences
between a plant and animal cell
Some starter information
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•
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Cells are the basic units of life
All living organisms contain cells
There are many different types of cells
Unicellular organisms are made up of just one cell
Multicellular organisms are made up of many
cells
• Cells can be stained to see cell structures more
clearly
Animal cell structure
1. Cytoplasm
2. Ribosome
3. Nucleus
4.
Mitochondria
5. Cell
membrane
Structure and function
1. Cytoplasm
Site of biochemical reactions
2. Ribosome
Site of protein synthesis
3. Nucleus
Contains genetic information. Control centre of the
cell
4. Mitochondria
Site of aerobic respiration
5. Cell membrane
Controls what enters and exits the cell
Cheek epithelial cells: Example of
animal cell
Plant cell structure
1. Mitochondria
2. Vacuole
3. Chloroplast
4. Ribosome
5. Nucleus
6. Cytoplasm
7. Cell membrane
8. Cell wall
Structure and function
1.
2.
3.
4.
5.
6.
7.
8.
Mitochondria
Site of aerobic respiration
Vacuole
Contains watery cell sap
Chloroplast
Site of photosynthesis
Ribosome
Site of protein synthesis
Nucleus
Contains genetic information. Control centre of the cell
Cytoplasm
Site of biochemical reactions
Cell membrane
Controls what enters and exits the cell
Cell wall
Boundary round plant cell, maintains cell shape. Freely
permeable
Examples of plant cells
Onion
Rhubarb
Elodea
What do all these cells appear to
have in common?