September 23 Flashcards

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1
Q

Anaerobic Respiration

A

Catabolic

e- acceptor other than oxygen

Possible e- aceptors: NO3-, Fe3+, SO42-, CO32-

Involves: e- transport, H+ motive force, ATPase

Less ATP than aerobic respiration

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2
Q

Chemolithotrophy

A

Aerobic

Catabolic

Inorganic e- donor: H2S, H2, Fe2+, NH3

Autotrophic

CO2 carbon source

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3
Q

Phototrophy

A

Use light to generate proton motive force which is used to drive ATP synthesis (Photophosphorylation)

Photoautotroph: use CO2

Photoheterotroph: organic carbon source

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4
Q

Define microbial growth

A

Increase in the number of cells

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5
Q

Binary Fusion

A

Cell elongation to twice its original length

Form a partition (septum) that constricts the cell into two daughter cells

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6
Q

Generation Time

A

the time needed for microbial population to double (varies between species)

Shorter for prokaryotes

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7
Q

Lag phase

A

From inoculation to beginning of growth

Period of adjusting to a new environment

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8
Q

Log Phase

A

Exponential growth

Cells are healthiest and most desireable state

Best time to stain

Best time to administer antibiotics (work on actively growing cells)

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9
Q

Stationary phase

A

Waste products build up

Nutrients running low

No net increase or decrease in cell number (cryptic growth)

Population growth rate is zero

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10
Q

Death Phase

A

Dying cells out number new cells (negative growth rate)

Cells either die or produce endospores

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11
Q

Chemostat

A
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