What would characterize the phenotype of a CheB mutant?

Question

Quizplus · Accepted Answer

CheB is responsible for demethylating the chemoreceptor in bacterial chemotaxis. A CheB mutant would not be able to remove the methyl groups, causing the receptor to remain in a constant signaling state, leading to constant tumbling. This means that the bacteria would not be able to effectively move towards attractants or away from repellents, resulting in a loss of motility. Therefore, choice B is the best characterizing phenotype for a CheB mutant.

What Would Characterize the Phenotype of a CheB Mutant