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Chemotaxis is a phenomenon of

  • A.swimming away of bacteria
  • B.swimming towards a bacteria
  • C.swimming away or towards of bacteria in presence of chemical compound
  • D.none of the above

Answer: C

Correct answer: swimming away or towards of bacteria in presence of chemical compound

Chemotaxis is movement in response to a chemical gradient - towards an attractant such as a sugar or amino acid, and away from a repellent. The cell cannot sense a gradient across its own length, so it compares concentrations over time, lengthening its runs when conditions improve and tumbling when they worsen.

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