Unformatted text preview: im. 4. You incubate a bacterium, B. periodus, in growth medium with ampicillin, and this bacterium
does not grow. (Note: B. periodus grows well in the growth medium with out ampicillin.) In
contrast, when you incubate P. microbius is the same growth medium, with the same
concentration of ampicillin, P. microbius grows well. When you incubate B. periodus and P.
microbius together in this growth medium with ampicillin, both B. periodus and P. microbius
grow well. Speculate (in broad not specific terms) as to what could account for the ability of B.
periodus to grow in ampicillin containing medium when grown in the presence of P. microbius? 5. L. acido is a gram-positive bacterium that is resistant to penicillin, which inhibits
peptidoglycan biosynthesis. This resistance is not due to biofilm formation, as the planktonic
cells of L. acido are resistant to penicillin. List TWO likely mechanisms by which L. acido may
be resistant to the penicillin. 6. C. resistus is resistant to the antibiotic methicillin....
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- Summer '10
- Bacteria, P. microbius, B. periodus