Lecture 29: microbes & energy flow Flashcards

1
Q

most organisms cannot be or have not been

A

isolated in pure cultures

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2
Q

identification of organisms can now be done using

A

genetic ‘fingerprints’

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3
Q

the uncultured microbial world is

A

far greater than the cultured world

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4
Q

individual microbial cells of a species proliferate to form a

A

population

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5
Q

populations interact/communicate to form

A

communities

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6
Q

microbial ecology is

A

the study of the interrelationship among microorganisms and their environment

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7
Q

microbiome is

A

all microorganisms, and their genes, within a particular environment

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8
Q

enrichment cultures provide

A

specific temperature and chemical conditions that encourage growth of specific groups of microbes

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9
Q

enrichment cultures are examples of

A

mesocosms

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10
Q

mesocosms are

A

an experimental system that stimulates real-life conditions as closely as possible

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11
Q

metabolism can be broken in to two aspects

A
  • catabolism

- anabolism

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12
Q

harvesting building blocks can release

A

energy

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13
Q

reduction-oxidation in bacteria:

H2S is

A

oxidised to S

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14
Q

reduction-oxidation in bacteria:

following H2S oxidisation NADP+ is

A

reduced to NADPH2

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15
Q

reduction-oxidation in bacteria:

following NADP+ reduction NADPH2 is

A

oxidised to NADP+

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16
Q

reduction-oxidation in bacteria:

Following NADPH2 oxidation CO2 is

A

reduced/fixed to form a carbohydrate (CH2O)n

17
Q

for every oxidation action in a cell

A

there is an equal and opposite reduction reaction

18
Q

autotrophs are ….. of CO2

A

primary producers

19
Q

autotrophs are able to

A

fix CO2

20
Q

heterotrophs are ….. of CO2

A

decomposers

21
Q

heterotrophs cannot use

A

CO2 directly, need fixed carbon

22
Q

chemotrophs use

A

chemical energy

23
Q

sources of chemical energy are

A
  • organic

- inorganic

24
Q

phototrophs use

A

solar energy

25
Q

non-cyclic photophosphorylation generates

A

oxygen, ATP and NADPH

26
Q

cyclic photophosphorylation generates

A

ATP but not oxygen

27
Q

cyclic photosynthesis is

A

anoxygenic

28
Q

non-cyclic photosynthesis is

A

oxygenic

29
Q

both cyclic/non-cyclic photosynthesis use

A

light for energy

30
Q

both cyclic/non-cyclic photosynthesis fix

A

carbon

31
Q

non-cyclic photosynthesis splits water

A

to produce products

32
Q

many microbes use ….. as an energy source

A

light

33
Q

to avoid competition microbes absorb

A

different wavelengths of light

34
Q

microbes absorb different wave lengths of light by

A

tuning their antenna to different wavelengths

35
Q

oxygen dependent organisms can live in

A

anoxic environments

36
Q

organisms can ….. their electrons from ….. into ….. zones so they can still breath

A
  • shuttle
  • anoxic
  • oxic
37
Q

organisms shuttle electrons using

A

self made cables