When a Nonpermissive Strain of Salmonella Was Infected with a P22

question 32

Essay

When a nonpermissive strain of Salmonella was infected with a P22 phage carrying a tetracycline resistance gene, the Salmonella still became resistant at a high frequency. How did this happen and what suggested this was the case?

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Definitions:

Andes

A major mountain range along the western edge of South America, formed by the subduction of the Nazca Plate beneath the South American Plate.

Pyroclastic Flows

Fast-moving currents of hot gas and volcanic materials (such as ash and rock fragments) that flow down the slopes of a volcano during an explosive eruption.

Mudflows

Rapid flows of water-saturated earth material, primarily composed of mud and often triggered by heavy rains or volcanic activity.

River Valley

a long, narrow region carved by river erosion, often surrounded by hills or mountains.