Microbes in Human Welfare - Online Test
The bacteria which grows anaerobically on cellulose material and produces large amount of methane along with and are collectively called
Methanogens are autotrophic archebacteria that use anaerobic respiration for ATP synthesis.
Methanogens use CO2 taken up from their growth environment as the carbon substrate for growth. They use some CO2 as the ultimate oxidizing agent of an electron transport chain which, by a chemiosmotic mechanism, maintains a transmembrane electrochemical ion gradient which powers ATP production.
The reducing agent that drives the electron transport chain is hydrogen also taken up from the growth environment. This hydrogen is the waste end product of the metabolism of other, heterotrophic microorganisms. Methanogens use this hydrogen and this process maintains a lowered hydrogen partial pressure in the reticulo-rumen.
It is present in dung of animals.
Commensalism is a relationship between two organisms where one receives a benefit or benefits from the other and the other is not affected by it. In other words, one is benefited and the other is neither benefited nor harmed.
Example:
- Orchids - Some orchids grow on trees and that does not harm the tree.
- Pilot fish - Pilot fish live around sharks, sea turtles and rays and eat the parasites that live on them as well as leftover food they do not eat. Young pilot fish gather around jellyfish and seaweeds.
