10 Questions
What factors contribute to the oxygen sensitivity of obligate anaerobes?
oxidative stress and enzyme production
What is the oxygen tolerance range for obligate anaerobes?
0.5% - 8%
What are the damaging compounds to microbes known as?
reactive oxygen species (ROS)
How does molecular oxygen get reduced within cells?
to superoxide (O−2) and hydrogen peroxide (H2O2)
What happens when superoxide and hydrogen peroxide react?
formation of a free hydroxyl radical (OH.)
What are the consequences of normal atmospheric concentrations of oxygen on obligate anaerobes?
Normal atmospheric concentrations of oxygen can kill obligate anaerobes.
What compounds are formed when oxygen is reduced within cells?
Oxygen is reduced to superoxide (O−2) and hydrogen peroxide (H2O2) within cells.
What are some factors that contribute to the oxygen sensitivity of obligate anaerobes?
The oxygen sensitivity of obligate anaerobes can be attributed to oxidative stress and enzyme production.
What are reactive oxygen species (ROS)?
Reactive oxygen species (ROS) are highly reactive compounds that are damaging to microbes.
In what ways can oxygen damage obligate anaerobes that do not involve oxidative stress?
Oxygen can damage obligate anaerobes through ways not involving oxidative stress by forming free hydroxyl radicals (OH.)
Test your knowledge on oxygen sensitivity in obligate anaerobes with this quiz. Explore the varying oxygen tolerance levels among different species and understand the factors contributing to their survival in low-oxygen environments.
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