Question

This organism gained the ability to metabolize citrate in a 30-year ongoing (15[1])evolution experiment conducted by Richard Lenski. (15[1])Francois Jacob and Jacques Monod discovered the lac (“lack”) operon in this organism. (15[1])Hemolytic-uremic syndrome is caused by this organism’s O157:H7 strain producing Shiga toxins. To prove DNA carries genetic material, T2 bacteriophages infected this organism in the (*) Hershey-Chase experiment. Most strains of these rod-shaped organisms can be found in the gut microbiome. For 10 points, name this often-studied model organism that can cause food poisoning. ■END■

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