Question 2 of 16 Points Bacteria swim by rotating their flagella. Counterclockwi

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Question 2 of 16 Points Bacteria swim by rotating their flagella. Counterclockwise rotation results in a smooth swimming motion wherease clockwise rotation induces tumbling and a change of direction Grade Place the following events in the correct order for a bacterial cell that is moving toward a repellent, such as weak acid. Policie Cell moving toward repellent up on a You lose O eTex O Help OWeb Cell changes direction the phosphorylated messenger the direction of the motor O Tech protein (response regulator) reverses, and the cell tumbles binds to the flagellar motor the phosphoryl group is a repellent binds to a receptor on the cell's surface residue of a second protein the bound receptor initiates tion of a His residue on an intracellular domain A o Previous & Give Up & View Solution Check Answer Next Exit Hint about us careers partners privacy policy terms of sse contact us help

Explanation / Answer

An important characteristic feature of the cell moving toward repellent is shown below:

The bacteria flagellum responds by chemotaxis process, it is mediated by two classes of substances namely: attractants and repellants. So, bacteria cell move toward high concentrations of attractants such as positive chemotaxis and away from high concentrations of repellants such as negative chemotaxis. So, the direction of the motor reverse and the cell tubmbles takes place.

The cell changes with response to the direction are explained as follows:

Bacteria cell recognize the attractants and repellants through a specialized proteins called chemotactic receptors. It is a methyl-accepting chemotactic protein and it bind to the cell surface or plasma membrane. This result initiates the autophosphorylation of histidine residue on an intracellular domine takes place. So, finally the phosphorylated messenger protein (response regulator) binds to the flagellar motor.

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