Microbes

microbes third year level

?
what are the microbes?
Bacteria, viruses and fungi. they can be harmful or helpful
1 of 16
what are the properties of: viruses, yeast, bacteria
viruses- can only replicate inside other cells yeast- unicellular organism, reproduces by budding, involved in the making of bread, beer and wine bacteria- comes in the forms of spiral, rod and disk, involved in the making of cheese/yoghurt
2 of 16
what are the properties of general microbes?
grow rapidly, can be found anywhere on earth, microscopic living organisms
3 of 16
what are disinfectants?
chemicals designed to remove microbes
4 of 16
what are antibiotics?
chemicals often made by fungi that kill bacterial cells.
5 of 16
what is the word equation for fermentation in yeast?
sugar ---yeast---> alcohol+co2+ a little energy
6 of 16
why are there more than one 1 antibiotic?
Because no antibiotic is effective against all bacteria. people may have an allergic reaction to one type. resistant strains are appearing.
7 of 16
why doesn't the doctor give me antibiotics for a cold?
colds and flu infections are viruses. fungi will not kill them
8 of 16
why doesn't the doctor always give me antibiotics?
bacteria are evolving and beginning to become resiliant to antibiotics. this is because of the overuse of them.
9 of 16
what does sensitive/ resistant mean?
sensitive- growth is prevented by the antibiotic resistant- no affect caused by the antibiotic
10 of 16
why does milk turn sour?
this is due to the action of bacteria. the bacteria use the sugar in the milk (lactose) as a food source and produce lactic acid as a by-product. Lactose---bacteria---> lactic acid
11 of 16
How is lactic acid used in cheese and yoghurt production?
Lactic acid is used to curdle the milk
12 of 16
how is biogas produced?
By adding bacteria to organic waste and it then gives of methane gas (biogas)
13 of 16
what is biological filtration?
it is the breakdown of organic material using microorganisms. complete breakdown of the sewage is only possible in aerobic conditions.
14 of 16
How is oxygen provided in biological filtration?
BY injecting compressed air and stirring
15 of 16
what problems occur when dumping untreated sewage into rivers?
increased no. of bacteria/ microorganisms, decreased concentration of oxygen in water, decreased biodiversity, can cause disease
16 of 16

Other cards in this set

Card 2

Front

what are the properties of: viruses, yeast, bacteria

Back

viruses- can only replicate inside other cells yeast- unicellular organism, reproduces by budding, involved in the making of bread, beer and wine bacteria- comes in the forms of spiral, rod and disk, involved in the making of cheese/yoghurt

Card 3

Front

what are the properties of general microbes?

Back

Preview of the front of card 3

Card 4

Front

what are disinfectants?

Back

Preview of the front of card 4

Card 5

Front

what are antibiotics?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Microbes and disease resources »