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Microbiology Ch. 6/7

Authored by Kate Blankenship

Physics

University

Used 7+ times

Microbiology Ch. 6/7
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86 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The addition of which of the following to a culture medium will neutralize acids?

Buffers

Sugars

Carbon

Heat

pH

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which enzyme catalyzes the reaction: H2O2 + 2H+ --> 2H2O?

Superoxide dismutase

Oxidase

Catalase

Peroxidase

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Most bacteria grow best at pH

9.

5.

1.

7.

14.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following pairs is mismatched?

Mesophile - growth at 25°C

Psychrotroph - growth at 0°C

Hyperthermophiles - growth at 100°C

Thermophile - growth at 37°C

Psychrophile - growth at 15°C

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Salts and sugars work to preserve foods by creating a

Hypotonic environment.

Lower osmotic pressure.

Depletion of nutrients.

Lower pH.

Hypertonic environment.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Three cells with generation times of 30 minutes are inoculated into a culture medium. How many cells are there after 5 hours?

48

1024

243

3 x 2^10

16

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Patients with indwelling catheters are susceptible to infections because

Biofilms develop on catheters.

Injected solutions are contaminated.

Their immune systems are weakened.

Bacteria cause infections.

Infections can be transmitted from other people.

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