WJEC Biology 2.7 Microorganisms

What do we call any living organism that is microscopic?

Microorganism,

Give examples of microorganisms

Bacteria
Fungi
Virus
Protists,

Microorganisms that can cause harm are known as what?

Pathogens,

What can bacteria and fungi be grown on?

Nutrient agar,

When nutrient agar is put in a Petri dish it is known as what?

Agar plate,

What should happen to nutrient agar and Petri dishes before they are poured?

Sterilised,

What is used to transfer bacteria to an agar plate?

Inoculating loop,

How do you sterilise an inoculating loop?

Heat to red in a Bunsen flame,

What temperature should inoculated agar plates be incubated at?

25⁰C,

How does temperature affect the growth of bacteria?

Refrigeration slows it down
Freezing stops it,

On average, how often do bacteria divide?

Every 20mins,

What is penicillin?

An antibiotic,

Do antibiotics work on viruses?

No,

What piece of equipment is used to grow penicillin?

A fermenter,

What is optimum temperature for penicillin growth in a fermenter?

23-28⁰C,

What is the optimum pH for penicillin growth in a fermenter?

6.5,

Penicillum is an aerobic fungus, what does it need for respiration and growth?

Oxygen,

After how many hours is the liquid drained from the fermenter?

200hrs,