Which of the following metabolic characteristic is a distinguishing characteristic and identification of colonies of E. coli?

Which of the following metabolic characteristic is a distinguishing characteristic and identification of colonies of E. coli?

Q. Which of the following metabolic characteristic is a distinguishing characteristic and identification of colonies of E. coli?

  1. Hydrogen sulfide formation
  2. Indole Formation
  3. Lactose fermentation
  4. Urea Degradation

Answer: Lactose fermentation   

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