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Which of the following is false?

  • A.Methyl, phosphoryl, adenyl, uridylyl and adenosine diphosphate ribosyl groups are the modifying groups
  • B.An example of an enzyme regulated by methylation is the methyl-donating chemo taxis protein of bacteria
  • C.The protein is a part of the system that permits a bacterium to swim towards attractant
  • D.The methylating agent is S- adenosylmethionine

Answer: B

Correct answer: An example of an enzyme regulated by methylation is the methyl-donating chemo taxis protein of bacteria

The protein is the methyl-accepting chemotaxis protein, not methyl-donating - it receives methyl groups, and the donor is S-adenosylmethionine. Its level of methylation is what lets a swimming bacterium compare concentrations over time and so move towards an attractant.

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