Multiple choice

Which of the following bacteria have vacuoles?

  1. Neisseria

  2. Methanococcus

  3. Nitrosomonas

  4. Thioploca
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D Correct answer
Explanation

Thioploca is a genus of filamentous sulfur bacteria, which contain large vacuoles. The cytosol is extremely reduced in this genera and the vacuole can occupy between 40–98% of the cell. The vacuole contains high concentration of nitrate ions.

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