GATE ES 2021 | Question: 35

Question

Which of the following is true for the nitrifying bacteria belonging to genus Nitrobacter?

• A. They are autotrophs.
• B. They are eukaryotes.
• C. They convert chemical energy to cellular energy using mitochondria.
• D. They convert $\mathrm{NO}_{3}^{-}$to $\mathrm{NO}_{2}^{-}$.