Microbiology Unit 1 Test 3

1.

1 point

What is the term for bacteria that have a basic pH optimum?

Alkalophiles

Psychrophiles

Acidophiles

Neutrophiles

2.

1 point

Osmotic pressure describes ______ while tonicity describes ______?

Solute Concentrations; Water Flow

Oxygen Flow; Carbon Flow

Water Flow; Solute Concentrations

Oxygen Flow; Water Flow

3.

1 point

Many microbes that do ________ are important environmental recyclers of certain elements.

Fermentation

Aerobic Respiration

Photosynthesis

Anaerobic Respiration

4.

1 point

Microbes that are exposed to cold temperatures will eventually denature.

True

False

5.

1 point

What is a hypertonic condition?

Having a high concentration of water

Having a low concentration of solutes

Having a low concentration of water

Having a high concentration of solutes

6.

1 point

What is a hyperosmotic condition?

Having a low concentration of solutes

Having a low concentration of water

Having a high concentration of solutes

Having a high concentration of water

7.

1 point

What are organisms that can grow with or without the presence of oxygen?

Facultative Anaerobes

Obligate Anaerobes

Obligate Aerobes

Facultative Aerobes

8.

1 point

When microbes are exposed to high temperatures, they will eventually denature.

True

False

9.

1 point

Which of the following is NOT a necessary chemical for life?

Sodium

Phosphorus

Carbon

Sulfur

10.

1 point

What is the term for bacteria that have a neutral pH optimum?

Neutrophiles

Alkalophiles

Acidophiles

Psychrophiles

11.

1 point

What is a hypoosmotic condition?

Having a high concentration of water

Having a low concentration of water

Having a low concentration of solutes

Having a high concentration of solutes

12.

1 point

Which of the following are physical requirements that a microbe must have in order to survive?

A Pilus

Temperature

pH

Osmotic Pressure

Large Size

Chemicals and Nutrients

13.

1 point

What converts hydrogen peroxide to water and oxygen?

Superoxide Dismutase

Catalase

ATP Synthase

Proteins

14.

1 point

What are the two types of fermentation?

Lactic Acid and Alcohol

Carbon Dioxide and Lactic Acid

Water and Alcohol

Carbon Dioxide and Water

15.

1 point

The optimal growth temperature for a microbe is usually near ______?

Medium Temperature

Minimum Temperature

Maximum Temperature

16.

1 point

What converts the superoxide ion into a less reactive but still toxic hydrogen peroxide?

Superoxide Dismutase

Catalase

ATP Synthase

Proteins

17.

1 point

What organisms grow in the presence of oxygen?

Aerobes

Anaerobes

18.

1 point

What is the term for bacteria that have an acidic pH optimum?

Neutrophiles

Psychrophiles

Acidophiles

Alkalophiles

19.

1 point

What is the term for microbes that grow best at hot temperatures?

Mesophiles

Psychrophiles

Thermophiles

Acidophiles

20.

1 point

What is the term for microbes that grow best at cold temperatures?

Neutrophiles

Mesophiles

Psychrophiles

Thermophiles

21.

1 point

What is the term for microbes that grow best at moderate temperatures?

Thermophiles

Mesophiles

Neutrophiles

Psychrophiles

22.

1 point

What is a hypotonic condition?

Having a low concentration of water

Having a low concentration of solutes

Having a high concentration of water

Having a high concentration of solutes

23.

1 point

What organisms cannot grow in the presence of oxygen?

Aerobes

Anaerobes

24.

1 point

Aerobic respiration uses a/an ______ as the final electron acceptor while anaerobic respiration uses a/an ______ as the final electron acceptor.

Oxygen; Inorganic Molecule

Oxygen; Hydrogen

Inorganic Molecule; Oxygen

Carbon; Oxygen

25.

1 point

What is a halophile?

A microbe that requires low salt concentrations

A microbe that requires high salt concentrations

A microbe that requires high and low salt concentrations

A microbe that requires no salt concentrations