1.7 Growing and Investigating Bacteria

Question 1

What can bacteria be grown in?

Answer 1

Agar jelly

Question 2

What are micro-organisms grown for in a lab?

Answer 2

To find the effect of antibiotics on certain bacteria

Question 3

What must happen before an investigation into bacteria?

Answer 3

All the equipment must be sterilised to ensure that unwanted microorganisms do not affect the culture

Question 4

Where might contamination come from?

Answer 4

The air, your skin

Question 5

What do bacteria need to grow?

Answer 5

Warmth and oxygen

Question 6

What temperature should bacteria be incubated at in school?

Answer 6

25 degrees celcius

Question 7

What temperature should bacteria be incubated at in industry?

Answer 7

35 degrees celius

Question 8

What two ways must you keep the bacteria culture pure?

Answer 8

Sterilising the equipment by passing the metal loop through a flame and seal the lid of the petridish

Question 9

Why should be petridish be not sealed so it is airtight?

Answer 9

So oxygen can still get into it and harmful anaerobic bacteria do not grow