
MICRO CHAPTER 1 - 3 - 7 - 8
Authored by Chi Hà
Chemistry
University

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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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