Exam 2 graph too

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Last updated 11:05 PM on 3/1/25
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35 Terms

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Acidophile
Microbes likely found in a vent at pH 1.5.
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Thermophile
Microbes likely found in a hot tub at 39°C.
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Halotolerant
Microbes likely found living in salt marshes.
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Quorum sensing
Used by bacteria to determine the density of the population.
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Sterilization
The complete removal or killing of all vegetative cells, endospores, and viruses from a targeted item or environment.
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Alkaliphiles
Microbes likely found from Lake Natron, where the water pH is close to 10.
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Psychrotroph
Microbes likely found in a soup container forgotten in the refrigerator and shows contamination.
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Antiseptics
Antimicrobial chemicals safe for use on living skin or tissues.
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Autoclave
The method of microbial control that sterilizes microbiological media.
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Disinfection
The inactivation of most microbes on the surface of a fomite by using heat or antimicrobial chemicals.
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Pasteurization
Method of microbial control used to prevent spoilage of milk, apple juice, and honey.
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Ethylene oxide

Toxic gaseous sterilant.
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Phenol

Easily contaminated by Pseudomonas bacteria.
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Bleach

Can be a sterilant, a disinfectant, and an antiseptic.
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Bleach

The first disinfectant used in operating rooms.
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Detergents

A low-level germicide.
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Bacteriostatic agent

Inhibits bacterial growth.
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Bacteriocidal agent

Kills bacteria.
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B. Protozoan cysts are easier to destroy.

ETD
Endospores or B. Protozoan cysts

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B. Enveloped viruses are easier to destroy.

ETD
Naked viruses or B. Enveloped viruses

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B. Gram-negative bacteria are easier to destroy.

ETD
Gram-positive bacteria or B. Gram-negative bacteria

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B. Endospores are easier to destroy.

ETD
Mycobacteria or B. Endospores

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B. Enveloped viruses are easier to destroy.

ETD
Gram-positive bacteria or B. Enveloped viruses

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B

Log phase

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B

Period of fastest growth

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A

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Lag phase

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D

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Death Phase

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C

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Stationary phase

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B

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Increase of population size is exponential

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C

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Population size levels off

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C

Toxic waste begins to accumulate

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C

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Cell division = death rate

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A

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Cells metabolically active, but not dividing

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A

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Bacteria are adapting to a new medium

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D

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Death rate is greater than rate of cell division