Microbiology GCSE Biology AQA (higher)

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What are microorganisms grown on in Petri Dishes?
agar
1 of 34
What does this contain?
minerals, proteins, vitamins and carbohydrates.
2 of 34
what is the loop-stick thing used to transfer micro-organisms to Q1?
inoculating loop
3 of 34
How are these sterilized?
passed through a flame
4 of 34
How should the lid be held shut?
adhesive tape
5 of 34
Why are these cultures incubated at 25oC in schools and colleges?
So harmful pathogens are less likely to grow
6 of 34
What happens to yeast cells when oxygen is present?
they reproduce at a faster rate because they are respiring at a faster rate
7 of 34
What happens when oxygen is absent?
they respire anaerobically
8 of 34
what does yeast produce when oxygen is absent?
they produce alcohol and carbon dioxide
9 of 34
What is this called?
fermentation
10 of 34
Where is the carbohydrate got from when beer is brewed?
the starch in barley grains
11 of 34
What is the first step in the making of alcohol?
starch is broken down into sugars by enzymes.
12 of 34
what is the second step in making alcohol?
hops are added
13 of 34
What is the energy source used in wine?
the sugar in grapes
14 of 34
What is the first stage in making yoghurt?
bacteria is added to warm milk
15 of 34
What is the second stage in making yoghurt?
the milk sugar is fermented by the bacteria, producing lactic acid.
16 of 34
What is the third stage in making yoghurt?
lactic acid causes milk to clot
17 of 34
What is the chemical name for milk sugar?
lactose
18 of 34
What are industrial fermenters?
large vessels that are used to grow microorganisms
19 of 34
Name another way that the conditions in a fermenter are monitored.
a jacket of cool water around the outside to control the heat given off by micro-organisms
20 of 34
Name another way that the conditions in a fermenter are monitored.
there is an air supply supplying oxygen for respiration
21 of 34
What fungus is used to produce mycoprotein - a vegetarian meat substitute?
Fusarium
22 of 34
What mould is penicillin made from?
Penicillium
23 of 34
What is mycoprotein made in/on?
starch
24 of 34
What is penecillin made in/on?
a fermenter
25 of 34
What does the solution inside the vessel that makes penicillin contain?
sugar for energy
26 of 34
What is used to break down plants and waste material?
microorganisms respiring anaerobically
27 of 34
What gas is mainly produced in this process?
methane
28 of 34
What can this be used by on a small scale?
house or farm
29 of 34
What is the main product of this process?
biogas
30 of 34
How is this obtained?
from maize starch by a carbohydrase enzyme
31 of 34
What must happen to this ethanol produced?
It must be distilled
32 of 34
What is it then used for?
fuel in cars
33 of 34
How do the microorganisms respire during the fermentation process?
anaerobically
34 of 34

Other cards in this set

Card 2

Front

What does this contain?

Back

minerals, proteins, vitamins and carbohydrates.

Card 3

Front

what is the loop-stick thing used to transfer micro-organisms to Q1?

Back

Preview of the front of card 3

Card 4

Front

How are these sterilized?

Back

Preview of the front of card 4

Card 5

Front

How should the lid be held shut?

Back

Preview of the front of card 5
View more cards

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