A Certain Species of Bacterium Is Not Very Effective at Colonizing

question 18

Multiple Choice

A certain species of bacterium is not very effective at colonizing potato plants because the potato plants have a resistance gene that responds to the presence of the bacterium.Which of the following mutations would make the bacterium more successful at invading the potato plant?

• A)a mutation in the plant's resistance gene that made it heterozygous,leading to a mutant gene product that is able to recognize different avirulence factors
• B)a mutation in the bacterial avirulence gene that made the avirulence factor unable to bind to the plant's resistance factor
• C)a mutation in the plant's resistance gene that made the resistance factor able to bind more tightly to the avirulence factor
• D)a mutation in the bacterial avirulence gene that made the avirulence factor able to bind to a different resistance factor in the plant

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