Methanogens are heterotrophs found in anaerobic enviroments nutrient rich in org
ID: 254034 • Letter: M
Question
Methanogens are heterotrophs found in anaerobic enviroments nutrient rich in organic compounds. Although methanogens make up a very small fraction of the total microbial community in these enviroments, they create an enourmous amount of methane using CO2 from the enviroment in a process called methanogenesis.
A) based on the information, what form of tropism does methanogenesis represent
B) based on the informaiton, what is the metabolic purpose of methanogenesis
C) based on the information, what is the electron donor and the electron acceptor for respiration
Explanation / Answer
A) based on the information, what form of tropism does methanogenesis represent
Answer: Methanogens are microorganisms that produce methane as a metabolic byproduct in anoxic conditions. They uniquely belong to the domain of archaea. So they represent anaerobic i.e. negative Aerotropism
B) based on the informaiton, what is the metabolic purpose of methanogenesis
Answer: It’s metabolic purpose is to carry out respiration without presence of oxygen and generate energy required for different processes and metabolism.
C) based on the information, what is the electron donor and the electron acceptor for respiration
Answer: electron acceptor for respiration is not oxygen, but carbon is electron acceptor
and hydrogen (H2) as electron donor
Methanogenic archaea convert a few simple compounds such as H2 + CO2, formate, methanol, methylamines, and acetate to methane.