1. Unit 1 – Living Cells Topic 1 – Cells and DNA Topic 2 – Microbes!
Animal and plant cells
DNA, genes and chromosomes
Cell Division
DNA profiling
Topic 2 – Microbes!
Types of Microbes
Controlling the growth of microbes
Microbes in industry

2. Types of microbes LEARNING OUTCOMES
State another term for ‘microbe’
State what a microbe is
State the 3 types of microbes
Set up an agar dish to view microbial growth

3. Think / Pair / Share… What is a ‘microbe’? What is a ‘micro-organism’?
Can you name 3 different types of microbes?
How can we see microbes?

4. Microbes
Microbes are single-celled organisms (unicellular) that are too small to be seen with the naked eye
Another word for a microbe is “micro-organism”

5. 3 main types of microbes:
Viruses
Bacteria
Fungi

6. There are more bacteria on your hands then there cells in your body
True or False?
There are more bacteria on your hands then there cells in your body
True

7. The bacteria in your intestines alone would fill a 2L bottle of Coke
True or False?
The bacteria in your intestines alone would fill a 2L bottle of Coke
True

8. True or False?
Gut bacteria help us absorb nutrients and actually produce vitamins B & K for us to absorb
True

9. The intestine of a fetus is sterile
True or False?
The intestine of a fetus is sterile
True

10. True or False?
A lack of gut bacteria has been linked to increased chance of allergies
True

11. Gut bacteria pass between mother and baby through breast milk
True or False?
Gut bacteria pass between mother and baby through breast milk
True

12. Microbes cause many different diseases such as AIDS and TB
True or False?
Microbes cause many different diseases such as AIDS and TB
True

13. 3 main types of microbes:
Viruses
Bacteria
Fungi

14. Growing Microbes
If microbes are left to grow, you can eventually see them without a microscope!
You grew microbes on bread in S1!
But now we will use agar to grow microbes!

15. Growing Microbes
Agar is a gelatine like substance that contains nutrients. The microbes feed on these nutrients and grow on the agar.
Today you will:
Investigate where microbes grow and set up your agar dishes
Place them in an incubator at 30°C for a week

16. Growing Microbes

17. Growing Microbes
Now that you have set up your dishes – we will look at the results next week!
Microbial growth on hands VIDEO! (4 mins)

18. Types of microbes LEARNING OUTCOMES
State another term for ‘microbe’
State what a microbe is
State the 3 types of microbes
Set up an agar dish to view microbial growth

20. Types of microbes LEARNING OUTCOMES
Identify what a bacterial cell looks like
Identify what a yeast cell looks
State what type of microbe Yeast is

21. Viewing microbes Yoghurt bacteria Yeast Solution
Aim: To use the microscope to view different microbes
Yoghurt bacteria
What bacterial cells look like under the microscope:
Yeast Solution
What yeast cells look like under the microscope:

22. unicellular
billions
bacteria
viruses
smallest
biggest

23. Bacterial cell Site of chemical reactions Contains genetic material
Helps the bacterium to move / swim
Controls what enters and leaves the bacterium
Provides protection for the bacterium
Helps the bacterium keep its shape, provides support

24. Bacteria come in all shapes and sizes!

25. Yeast cell

26. Viewing yeast cells under the microscope

27. Answers to Questions Nucleus Flagellum
What is missing from a bacterial cell that an animal cell has?
Where does the bacterium cell store its chromosomes?
What part of the bacterial cells do you think helps it to swim and move?
What similarities are there between the yeast cell and an animal cell?
What similarities are there between the yeast cell and a plant cell?
Yeast cells are described as both animal and plant cells. Why do you think this is?
Nucleus
In the cytoplasm
Flagellum
They both have a cytoplasm, nucleus and cell membrane
They both have a vacuole and a cell wall
Because the yeast cell contains both animal and plant structures

28. Types of microbes LEARNING OUTCOMES
Identify what a bacterial cell looks like
Identify what a yeast cell looks
State what type of microbe Yeast is

30. Quiz
Identify the microbe
Label parts A and B A B

31. Quiz
Identify the microbe
Label parts A and B A B

32. Quiz
Identify the microbe
Label parts A and B A B

33. Quiz
Identify the microbe
Label parts A, B and C A C B