Question

A student isolates an unknown bacteria sample from the bottom of a swamp. The student discovers that this species is able to live and grow in an oxygen-free enviroment, but it requires nitrate-rich soil.

Which of the following respiration pathways is this species or bacteria most likely using?
a. ethyl alcohol fermentation
b. lactic acid fermentation
c. aerobic respiration
d. anaerobic repiration

Answer 1

Answer: Anaerobic Respiration.

Step-by-step explanation:

The bacteria that is found in the bottom of the swamp requires nitrate rich soil and does not requires oxygen for its survival would be using the anaerobic respiration.

Anaerobic respiration does not requires oxygen and can perform respiration even in the absence of oxygen.

This process requires organic matter and converts it into carbon dioxide and energy. It can use nitrate as a source of organic matter and final electron acceptor instead of oxygen.

Answer 2

The respiration pathway that this species of bacteria is most likely using is D. anaerobic respiration.
Since it says in the question that it grows in an oxygen-free environment, meaning that it doesn't need oxygen, anaerobic respiration should be the correct answer. Aerobic means using air, whereas anaerobic is the opposite.