GCSE Biology – Core practical 5 – Bacterial cultures
Learning Objectives
-I can describe how bacteria divide
-I can describe how to prepare an uncontained culture of bacteria using aseptic technique
-I can describe the use of bacterial cultures grown on agar plates
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Question 1 of 25
1. Question
How do bacterial cells divide?
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Question 2 of 25
2. Question
How often can bacterial cells multiply?
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Question 3 of 25
3. Question
After one binary fission, how many cells are there?
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Question 4 of 25
4. Question
Which factor affects rate of bacterial growth?
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Question 5 of 25
5. Question
Which factor affects rate of bacterial growth?
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Question 6 of 25
6. Question
How can bacteria be grown in a lab?
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Question 7 of 25
7. Question
How can bacteria be grown in a lab?
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Question 8 of 25
8. Question
What must our bacterial cultures be for an accurate experiment?
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Question 9 of 25
9. Question
What is the name of the culture dish?
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Question 10 of 25
10. Question
How do we sterilise the petri dish?
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Question 11 of 25
11. Question
What do we call the loop we transfer bacteria with?
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Question 12 of 25
12. Question
How do we sterilise the inoculating loop?
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Question 13 of 25
13. Question
What does the control disc do?
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Question 14 of 25
14. Question
What do we do with the other discs?
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Question 15 of 25
15. Question
Why do we not fully seal the petri dish?
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Question 16 of 25
16. Question
Why do we store the petri dish upside down?
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Question 17 of 25
17. Question
What temperature do we incubate the dishes at?
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Question 18 of 25
18. Question
Why do we incubate at this temperature?
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Question 19 of 25
19. Question
Why might laboratories incubate bacteria at a higher temperature?
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Question 20 of 25
20. Question
Which antiseptic is the best?
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Question 21 of 25
21. Question
How could we improve the investigation?
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Question 22 of 25
22. Question
How do we calculate the area of the zone of inhibition?
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Question 23 of 25
23. Question
What is the zone of inhibition?
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Question 24 of 25
24. Question
What would happen if we incubated at 200 °C?
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Question 25 of 25
25. Question
If mean division time is 20 minutes and a culture has 1000 bacterial cells to start with, how many cells will there be after 1 hour?
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