Chemotactic responses in E. coli and Salmonella are regulated through the Che signal transduction pathway. Swimming behavior can be affected by mutations in the pathway. For each of the following...

Chemotactic responses in E. coli and Salmonella are regulated through the Che signal transduction pathway. Swimming behavior can be affected by mutations in the pathway. For each of the following mutations, indicate the phenotype you would expect the mutant to exhibit. Choose from phenotypes A through C, using each phenotype as many times as necessary.

A. Runs (swims smoothly) constantly; never changes direction (i.e., never tumbles under any conditions)

B. Tumbles constantly under normal conditions but can run in response to high concentrations of stimulant

C. Runs constantly under normal conditions but can tumble in response to high concentrations of repellent