National 4/5 Biology

Unit 1: Cell BiologySection 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• 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

2. Ribosome

4. Mitochondria

3. Nucleus

5. Cell membrane

1. Cytoplasm

Structure and function1. Cytoplasm

Site of biochemical reactions2. Ribosome

Site of protein synthesis3. Nucleus

Contains genetic information. Control centre of the cell

4. MitochondriaSite of aerobic respiration

5. Cell membraneControls what enters and exits the cell

Cheek epithelial cells: Example of animal cell

Plant cell structure1. Mitochondria

2. Vacuole

3. Chloroplast

4. Ribosome

5. Nucleus

6. Cytoplasm

7. Cell membrane

8. Cell wall

Structure and function1. Mitochondria

Site of aerobic respiration2. Vacuole

Contains watery cell sap3. Chloroplast

Site of photosynthesis4. Ribosome

Site of protein synthesis5. Nucleus

Contains genetic information. Control centre of the cell6. Cytoplasm

Site of biochemical reactions7. Cell membrane

Controls what enters and exits the cell8. Cell wall

Boundary round plant cell, maintains cell shape. Freely permeable

Examples of plant cells

What do all these cells appear to have in common?

Onion Rhubarb

Elodea