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10 Cards in this Set
- Front
- Back
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what is a polysaccharide?
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Large Molecule made up of repeating sugar subunits
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why will starch not pass thru the bacterial cell (plasma) membrane?
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Too large
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Bacterial enzymes that can hydrolysis starch are ______________ enzymes?
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Amylase
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The overall reaction for the hydrolysis of starch involves breaking the polysaccharide down to ___________?
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glucose subunit
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why is starch invisible in starch agar?
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it is too small- not big enough for to block the light
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what is the purpose of adding gram's iodine to starch agar plates after incubation?
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to detect the presence or absence of starch in teh vicinity around the bacterial growth
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describe a negative result in this exp. (mention the indicator). what does this result mean?
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(-) no clearing around growth, no amylase present
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after adding iodine, what would an uninoculated plate of starch agar look like? why?
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all blue or dark brown coloring
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write the name of the group/section in bergey's manual to which the starch hydrolysis positive organism used in theis exp. belongs.
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E.coli gm (-) rod
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starch hydrolysis is one of the tests that aids in the differentiation of species in teh genus Clostridium, members of which cause the diseases:____,____,& _____ & species in teh genus Bacillus, which causes:_____
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lock jaw (tetanus)
gas gangrene botulism agent of anthrax |
