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MicrobiologyLab21

Questions about "Sugar Fermentations"

QuestionAnswer
Amino acid fermentation leads to the production of ________ ________ ________ and __________. alpha-keto acids, ammonia
The specific enzymes causing the fermentation of sugar belongs to the ________ enzyme type. endo
if phenol red turns a magenta color, it means ________ has been produced. ammonia
The small inverted tube found within a larger tube is called a ________ tube and is used to trap ________. Durham, gas
When phenol red changes to yellow, this indicates that ________ has been produced. acid
The two pH indicators most often used in a microbiology laboratory are ________ ________ and ________ ________. phenol red, bromeresol purple
The process of fermentation involves two groups of enzymes known as ________ and ________ ________. protease, transport permease
List the 4 essential parts or ingredients of a fermentation tube. nutrient broth, carbohydrate, pH indicator, Durham tube
List four fermentable carbohydrates other than those used in this exercise. fructose, mannitol, maltose, inulin, polyols
________ is the term that refers to the anaerobic breakdown of carbohydrates. Fermentation
pH of acid color change: 6.8
What color denotes neutral pH? Pink
What color denotes acidic pH? Yellow
What color denotes alkaline pH? Magenta
If a carbohydrate broth does not change color after it has been inoculated and incubated, how can you tell whether the unchanged color is due to failure of the organism to grow or failure to ferment the carbohydrate? Evidence of gas production in the Durham tube or turbidity of the broth can indicate growth.
Created by: NeuroHeart
 

 



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