20 Questions
What defines the environmental habitat that a species inhabits?
The species' tolerance to physical conditions
Why can't bacteria regulate their cell temperature?
Their cell temperature always matches the environment
What term is used to describe the temperatures that define a species' growth limits?
Thermal range
How do changes in temperature affect microbial physiology?
Optimize protein function
At which temperatures does a species grow most quickly?
$37°C$
How do extreme concentrations of hydronium ions (H3O+) or hydroxide ions (OH-) in a solution impact bacterial growth?
Limit growth by destabilizing macromolecular structures
At what pH range do acidophiles grow optimally?
0-5
What is the distinguishing characteristic of microaerophiles in terms of oxygen requirements?
Grow only at lower O2 levels
How do alkaliphiles differ from neutralophiles and acidophiles in terms of pH range for optimal growth?
Grow at pH 9-11
What happens to strict anaerobes in the presence of even a small amount of oxygen?
Die in the least bit of oxygen
Which type of microorganism would thrive best at a temperature of 25°C?
Mesophiles
In which temperature range would you expect to find Hyperthermophiles?
~65°C–121°C
Which type of microorganism would struggle to survive in a warm environment of 50°C?
Psychrophiles
How do proteins in Thermophiles differ from those in Mesophiles?
Proteins in Thermophiles are more heat-stable.
If an organism is classified as a Psychrophile, what temperature range would be most suitable for its growth?
~0°C–20°C
What are extremophiles?
Microbes that grow in conditions very different from those suitable for humans
What are the 'normal' growth conditions mentioned for microbes?
Sea level, temperature 20°C–40°C, near-neutral pH
Why do extremophiles differ significantly in their growth conditions from those suitable for humans?
Extremophiles are adapted to extreme temperature and pH conditions
What impacts the growth rates of hot-springs bacteria compared to deep-sea-sediment microbes?
Temperature and niche-specific physical parameters
How do extremophiles showcase the adaptability of microbes?
By thriving in extreme conditions different from those comfortable for humans
Test your knowledge on the classification of microorganisms based on their growth temperature. Learn about different categories like psychrophiles and mesophiles.
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