Multiple choice

A mixed culture containing caulobacter, campylobacter, citrobacter and corynaebacterium is inoculated in peptone broth containing 0.01% peptone and incubated aerobically. Which of the following bacteria will produce first turbidity in the medium?

  1. Citrobacter

  2. Caulobacter

  3. Campylobacter

  4. Corynaebacterium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Caulobacter naturally lives in dilute aquatic environment. It can grow in the medium with very low levels of carbon and nitrogen. In such minimal media, other bacteria fail to grow and caulobacter grows and produces turbidity.

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