Which of the following description of chemotaxis is correct for polar forms A. Attractant starts counterclockwise rotation of flagellum = a run. B. Loss of stimulus reverses direction of flagellum bacterium tumbles. C. Attractant makes flagella sweep toward one end and rotate = a run D. Loss of stimulus and flagella loose coordination and bacterium tumbles.
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Attractant starts counterclockwise rotation of flagellum = a run: This statement is correct. In the presence of an attractant, the flagellum rotates counterclockwise, causing the bacterium to move in a straight line or "run." Show more…
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Which of the following statements regarding chemotaxis is incorrect? Select one: a. The fuel for flagellar motion is not ATP, but a proton gradient. b. In a tumble, the flagellum reverses direction, causing the cell to stop moving and change course. c. When a cell detects a nutrient gradient, it will increase the frequency of runs to move toward the nutrient. d. In a cell with peritrichous flagella, each flagellum moves individually but in a coordinated direction during a run.
Which of the following describe prokaryotic flagella? (check all that apply). Cause the cell to "run" and "tumble" Create motility by whipping back and forth (like a fish tail) Rotate counter clockwise to create forward motion Made up of 9 pairs of microtubules Composed of three parts: basal body, hook, filament Respond to chemicals (chemotaxis)
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