If an organism grows in the OF-glucose medium that is exposed to air, is the organism...

If an organism grows in the OF-glucose medium that is exposed to air, is the organism oxidative or fermentative?

I know the answer is it could be either but i do not know how to explain it

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Expert Solution

Could be either. If an organism grows on OF glucose medium when exposed to air it is oxidative (areobic) metabolism. We should also see growth/acid production in the tube, as theorganisms require oxygen to convert the sugars in the media. If it was fermentative (anaereobic metabolism), we can still see growth/acid production through the entire tube, as their growth isn't dependant on oxygen to occur.C. Fermentation Tubes1.What would happen if an organism used up all the carbohydrate in a fermentation tube? What color would the indicator be then?The organism would oxidase peptone and produce ammonia resulting in turning the indicator from yellow (production of acid) to red (neutral).2.If an organism metabolizes glucose aerobically, what result will occur in the fermentation tubes?Gas will be trapped in the inverted or Durham tube. Bubbles will appear.3.If a bacterium cannot ferment glucose, why not test its ability to ferment other carbohydrates?Because glucose is a monosaccharide and is already in its simplest form, other carbohydrates would need to be broken down into monosaccharides.

gladiator answered 1 year ago

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