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WorksheetsMetabolic Activities of Bacteria
Total questions: 15
Worksheet time: 8mins
To test carbohydrate fermentation of bacteria, one must use nutrients broth with the following, except?
monosaccharide
peptone
urea
disaccharaide
Which of the following do not indicate carbohydrate fermentation?
bubble at the top of durham tube
yellow color of medium
dark colored bacteria
none of the above
Which of the follwoing is not true about gelatin?
first used by Robert Koch
Solid at temperature above 28 degree Celsius
can be broken down by gelatinase enzyme
all are true
What enzyme can be detected when using nutrient gelatin deeps?
(a)
What enzyme breaks down starch into monosaccharides and disaccharide?
(a)
What do this image indicate?
positive in amylase enzyme
positive in gelatinase enzyme
positive in urease enzyme
positive in caseinases enzyme
What enzyme is produce by some bacteria that breaks down caseins?
(a)
Letter C indicates __________.
presence of caseinases
absence of caseinases
Urease enzyme breaks down urea into _________.
ammonia
carbon dioxide
protein
two of the above
What is the pH indicator in Simmon's citrate medium?
bromothymol pink
bromothymol blue
bromothymol green
bromothymol yellow
What toxic compound is a byproduct of aerobic metabolism?
supermonoxide free radicals
superoxide dismutase
hydrogen peroxide
All of the above
What does bubble indicate when hydrogen peroxide is added to the bacteria?
urease
gelatinase
catalase
tryptophanase
Presence of indole is detected using BBL dry slide. Presence of indole will result _______ color to the slide
yellow
pink
green
red
Tryptophanase breaks down tryptophan into the following except?
urea
ammonia
indole
pyruvate
It is a metabolic process that breaks down glucose into pyruvate.
(a)
