means that they perform fermentation only under anerobic conditions
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It means that yeast can switch between aerobic (with oxygen) and anaerobic (without oxygen) metabolism depending on the availability of oxygen in its environment. In the presence of oxygen, yeast will metabolize sugars using aerobic respiration, but in the absence of oxygen, it will use fermentation to generate energy.
Bacillus subtilis is a facultative anaerobe, meaning it can grow in the presence or absence of oxygen.
Yes, salmonella is a facultative anaerobe, meaning it can survive in both oxygen-rich (aerobic) and oxygen-poor (anaerobic) environments.
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Yes, Serratia is a facultative anaerobe and can ferment lactose.
Serratia marcescens is a facultative anaerobe, meaning it can grow in the presence or absence of oxygen. While it can use oxygen for respiration, it also has the ability to ferment carbohydrates in anaerobic conditions when oxygen is not available.