Effectiveness of disinfectants

This is another practical lesson on comparing the size of clear zones when discs of different disinfectant is applied onto an agar plate with bacteria.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Prokaryotic cells have an extra ring of DNA. What is it called?

1/5

Q2.Why is the agar plate necessary for bacterial culture?

2/5

Q3.Which TWO of the following is present in prokaryotic cells but not in an eukaryotic animal cell?

Select two (2) boxes

3/5

Q4.Why is it not a good idea to put the inoculating loop IN the Bunsen flame for 10 seconds?

4/5

Q5.What is binary fission?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Prokaryotic cells have an extra ring of DNA. What is it called?

1/5

Q2.Why is the agar plate necessary for bacterial culture?

2/5

Q3.Which TWO of the following is present in prokaryotic cells but not in an eukaryotic animal cell?

Select two (2) boxes

3/5

Q4.Why is it not a good idea to put the inoculating loop IN the Bunsen flame for 10 seconds?

4/5

Q5.What is binary fission?

5/5

Video

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Worksheet

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Effectiveness of disinfectants

This quiz will assess you on your understanding in working scientifically, antibiotic resistance and aseptic techniques.

Q1.What is a hypothesis?

1/5

Q2.In the practical of testing the effectiveness of different types of disinfectants, what was the dependent variable?

2/5

Q3.In the practical of testing the effectiveness of different types of disinfectants, what was the control variable?

3/5

Q4.What does aseptic mean? Choose THREE answers.

Select three (3) boxes

4/5

Q5.Calculate the area of a clear zone with a 4 mm radius. Take π as 3.14. Correct your answer to 3 significant figures.

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Effectiveness of disinfectants

This quiz will assess you on your understanding in working scientifically, antibiotic resistance and aseptic techniques.

Q1.What is a hypothesis?

1/5

Q2.In the practical of testing the effectiveness of different types of disinfectants, what was the dependent variable?

2/5

Q3.In the practical of testing the effectiveness of different types of disinfectants, what was the control variable?

3/5

Q4.What does aseptic mean? Choose THREE answers.

Select three (3) boxes

4/5

Q5.Calculate the area of a clear zone with a 4 mm radius. Take π as 3.14. Correct your answer to 3 significant figures.

5/5

Lesson summary: Effectiveness of disinfectants

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Time to move!

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For 5 mins...

Move around:
Walk

On the spot:
Dance

The next lesson in:
Cell biology
is:
Stem cells and their uses

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