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Micro Chapter 7: Microbial Nutrition, Ecology And Growth > C. Factors That Affect Microbial Growth > Flashcards

C. Factors That Affect Microbial Growth Flashcards

0
Q

Facultative

A

Exist in a wider variety (range of conditions)

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1
Q

Obligate

A

Exist in a very narrow niche

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2
Q

Cardinal temperature range

A

Temp range required for growth

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3
Q

Pyschrophile

A

Grow in cold temperatures

Can grow in 0 C

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4
Q

Mesophile

A

Optimum temp is 37 C (body temp)

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5
Q

Thermophiles

A

Exist in hot temp

Ex. Volcano

Extemophiles

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6
Q

Obligate pyschrophile

A

Only grow in cold

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7
Q

Facultative pyschrophile

A

Prefer warm

Can grow in cold temp

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8
Q

Growth enzymes

A

Have specific shapes

Denature when too hot

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9
Q

If an organism uses O2

A

Toxic waste products will be produced

Need detox enzymes

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10
Q

Two toxic waste products from O2 are?

A

Superoxide ion

Hydrogen peroxide

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11
Q

2 enzymes that detox

A

Super oxide dismutase

Catalase

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12
Q

Super oxide dismutase

A

Converts superoxide ions into hydrogen peroxide

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13
Q

Catalase

A

Converts hydrogen peroxide into water and oxygen

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14
Q

Obligate aerobe

A

Must have O2 (or die)

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15
Q

Micro aerophiles

A

Must have O2, but in smaller concentrations than normal atmosphere

Most of pathogens and normal flora

16
Q

Obligate anaerobes

A

Must be in O2 free environment (or die)

Lack detox enzymes

17
Q

Facultative anaerobes

A

Can grow in O2 and non O2 environments

18
Q

Aerotolerant anaerobes

A

Grow everywhere

Must have detox enzymes

Prefer non - O2

Limited growth in O2

19
Q

Helicobacter pylori

A

Bacteria that causes ulcers

It’s an acidophile

20
Q

Most bacteria are ______, in terms of pH

A

Neutrophile

21
Q

Osmotic pressure

A

Pressure inside the cell from water and solute concentrations

22
Q

Halophile

A

Salt lover

Requires a larger amount of salt

23
Q

Halotolerant

A

Still grows in a salty environment

24
Q

The SA / Vol ratio best fit to handle salt water

A

Large cocci

25
Q

Osmophile

A

Grow best in best in environments that are high in sugar

26
Q

Xerophyte

A

Grow in dry conditions

Micro Chapter 7: Microbial Nutrition, Ecology And Growth (4 decks)

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