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Micro ch. 6

Micro ch. 6

10 questions • 2 mo ago

Question list

1

A desiccator chamber is used in which of the following methods of bacterial counts A. Dry weight B. Metabolic activity C. Most probable number D. Direct count

A

2

What type of reaction is seen when hydrogen peroxide is added to a microbial colony of catalase-producing bacteria? A. Bubbles are produced B. Production of noxious odor C. Color changes to blue D. Liquefying of agar medium

A

3

Autoinducers and pheromones are factors associated with which of the following? A. pH levels B. Generation time C. Growth factors D. Quorum-sensing

D

4

Which of the following terms describes cellular destruction or inhibition of growth by the osmotic loss of intracellular water? A. Bioleaching B. Denaturing C. Granulation D. Plasmolysis

D

5

In which stage of microbial growth are microbes most vulnerable to unfavorable conditions? A. Stationary B. Log C. Lag D. Death

B

6

What is the term for the organisms that grow best at temperatures close to normal human body temperature A. Thermophiles B. Mesophiles C. Cryophiles D. Psychrophiles

B

7

Which of the most commonly used method of measuring a bacterial population's size? A. Filtration B. Turbidity C. Dry weight D. Plate counts

D

8

Most bacteria grow best at a pH level of or near: A. 2.0 - 3.0 B. 3.5 - 4.5 C. 6.5 - 7.5 D. 8.0 - 8.5

C

9

Approximately how much of the total dry weigh of a bacterium is carbon? A. 4 percent B. 14 percent C. 50 percent D. 75 percent

C

10

Quorum-sensing contributes to the ability of bacterial colonies to congregate into nearly solid masses which act as barriers to effective decontamination and sterilization called: A. Biofilms B. Dessicators C. Autoinducers D. Purifies

A

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Micro ch. 17

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Ch. 20

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Ch. 21

Ch. 21

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Ch. 21

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Ch. 22

Ch. 22

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Ch. 22

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Ch. 23

Ch. 23

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Ch. 23

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Micro Ch. 19

Micro Ch. 19

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Micro Ch. 19

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Micro Ch. 20

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Micro Ch. 21

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Micro Ch. 21

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24 questions • 3 d ago

Micro Ch. 22

Micro Ch. 22

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Micro Ch. 22

Micro Ch. 22

10 questions • 3 d ago

Question list

1

A desiccator chamber is used in which of the following methods of bacterial counts A. Dry weight B. Metabolic activity C. Most probable number D. Direct count

A

2

What type of reaction is seen when hydrogen peroxide is added to a microbial colony of catalase-producing bacteria? A. Bubbles are produced B. Production of noxious odor C. Color changes to blue D. Liquefying of agar medium

A

3

Autoinducers and pheromones are factors associated with which of the following? A. pH levels B. Generation time C. Growth factors D. Quorum-sensing

D

4

Which of the following terms describes cellular destruction or inhibition of growth by the osmotic loss of intracellular water? A. Bioleaching B. Denaturing C. Granulation D. Plasmolysis

D

5

In which stage of microbial growth are microbes most vulnerable to unfavorable conditions? A. Stationary B. Log C. Lag D. Death

B

6

What is the term for the organisms that grow best at temperatures close to normal human body temperature A. Thermophiles B. Mesophiles C. Cryophiles D. Psychrophiles

B

7

Which of the most commonly used method of measuring a bacterial population's size? A. Filtration B. Turbidity C. Dry weight D. Plate counts

D

8

Most bacteria grow best at a pH level of or near: A. 2.0 - 3.0 B. 3.5 - 4.5 C. 6.5 - 7.5 D. 8.0 - 8.5

C

9

Approximately how much of the total dry weigh of a bacterium is carbon? A. 4 percent B. 14 percent C. 50 percent D. 75 percent

C

10

Quorum-sensing contributes to the ability of bacterial colonies to congregate into nearly solid masses which act as barriers to effective decontamination and sterilization called: A. Biofilms B. Dessicators C. Autoinducers D. Purifies

A