Answers

2015-01-04T17:59:37+05:30
Penicillin kills bacteria by interfering with the ability to synthesize cell wall. In this sequence, Escherichia coli were incubated in penicillin for 30 minutes. The bacteria lengthen, but cannot divide. Eventually the weak cell wall ruptures.

cholera and thypoid

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2015-01-04T19:12:50+05:30
The  penincillin  is  an  antibiotic.It  blocks  the  bacterial  processes  involved  in  cell  wall  synthesis.As      a  result  cell  wall isn't  formed and  in  absence  of  cell  wall the  bacteria  is  unable  to survive.

Example  of  water  borne  bacterial  diseases;Cholera and  Campylobacteriosis.
Cholera  is  caused  by  the  bacteria  vibrio  cholerae  and  Campylobacteriosis  is  caused  by  the  bacteria  campylobacter  jejuni.
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