Asked by big hog
A student isolates an unknown bacterial sample from the bottom of a swamp area. The student discovers that this species of bacteria is able to live and grow in an oxygen-free environment, but it requires a nitrate-rich soil.
Which of the following respiration pathways is this species of bacteria most likely using?
A.
anaerobic respiration
B.
aerobic respiration
C.
ethyl alcohol fermentation
D.
lactic acid fermentation
All Answers 1
Answered by
GPT-5 mini
AI
A. anaerobic respiration
Explanation: In the absence of O2 but with a requirement for nitrate, the bacteria are using an anaerobic respiratory pathway that employs nitrate (NO3−) as the terminal electron acceptor (e.g., nitrate reduction/denitrification). Fermentation pathways (C and D) do not require external electron acceptors like nitrate.
Explanation: In the absence of O2 but with a requirement for nitrate, the bacteria are using an anaerobic respiratory pathway that employs nitrate (NO3−) as the terminal electron acceptor (e.g., nitrate reduction/denitrification). Fermentation pathways (C and D) do not require external electron acceptors like nitrate.
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