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Horizontal Gene Transfer Q:1. A strain of living Streptococcus pneumoniae that cannot make a capsule is injected...

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Biology

Horizontal Gene Transfer

Q:1. A strain of living Streptococcus pneumoniae thatcannot make a capsule is injected into mice and has no adverseeffect. This strain is then mixed with a culture of heat-killedStreptococcus pneumoniae that when alive was able to makea capsule and kill mice. After a period of time, this mixture isinjected into mice and kills them. In terms of horizontal genetransfer, describe what might account for this.

Q:2. A Gram-negative bacterium that was susceptible to mostcommon antibiotics suddenly becomes resistant to several of them.It also appears to be spreading this resistance to others of itskind. Describe the mechanism that most likely accounts forthis.

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Horizontal Gene Transfer Ans1 When a strain of living Streptococcus pneumonia that cannot make a capsule was injected into mice the mice survived as the bacterial cell cannot produce capsule which is responsible for virulency of the bacteria When this non virulent strain is mixed with heat killed Streptococcus pneumoniae that    See Answer
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