MICRO CHAPTER 1 - 3 - 7 - 8

MICRO CHAPTER 1 - 3 - 7 - 8

University

40 Qs

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MICRO CHAPTER 1 - 3 - 7 - 8

MICRO CHAPTER 1 - 3 - 7 - 8

Assessment

Quiz

Chemistry

University

Practice Problem

Hard

Created by

Chi Hà

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40 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the most common method of reproduction in bacteria?

Budding

Binary fission

Sexual reproduction

Spore formation

Answer explanation

Bacteria usually reproduce by binary fission, where one cell divides into two identical cells

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the name of the protein that forms the Z ring during bacterial cytokinesis?

MreB

Crescentin

FtsZ

Tubulin

Answer explanation

FtsZ is a tubulin-like protein that forms the Z ring, playing a key role in septation during cell division

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which environmental factor directly affects enzyme activity in microbes?

Pressure

Temperature

Color

Shape

Answer explanation

Enzymes have optimal temperatures at which they function; high temperatures can denature enzymes

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which type of bacteria grows best at very high salt concentrations (above 2M)?

Mesophiles

Psychrophiles

Halophiles

Extreme halophiles

Answer explanation

Extreme halophiles require salt concentrations above 2M for optimal growth

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is NOT a phase in the bacterial growth curve?

Lag phase

Death phase

Balance phase

Exponential phase

Answer explanation

The bacterial growth curve includes lag, exponential, stationary, and death phases

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which bacteria require oxygen but at lower levels than atmospheric oxygen (2-10%)?

Obligate anaerobes

Microaerophiles

Facultative anaerobes

Aerotolerant anaerobes

Answer explanation

Microaerophiles require oxygen for growth but at lower concentrations (2-10%)

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is biofilm primarily made of?

Lipids

Polysaccharides, proteins, and DNA

Pure water

Carbohydrates only

Answer explanation

Biofilms are complex communities surrounded by extracellular polymeric substances (EPS)

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