Which of the following is correct regarding bacteria in the genus Nitrospira? A) They are Gram-negative, true lithotrophs, or autotrophs. B) Nitrospira spp. possess carboxysomes where they fix CO₂ or H₂CO. C) Nitrospira spp. are found in aquatic environments, where they remove excess nitrite. D) All of the above. E) None of the above.

Question

Quizplus · Accepted Answer

Nitrospira species are indeed Gram-negative and can function as true lithotrophs or autotrophs, utilizing inorganic compounds for energy. They are known to possess carboxysomes, which are structures involved in carbon fixation, although the specific notation for carbon fixation provided in option B is not standard and seems to be a typographical error. Nitrospira species play a crucial role in nitrogen cycling in aquatic environments by removing excess nitrite, making all the provided statements correct.

Which of the Following Is Correct Regarding Bacteria in the Genus