Question

# Energy source(chemical/light) Electron acceptor

photrophs

heterotrophs

anoxic denitrifiers

aerobes

obligate aerobes

obligate anaerobes

facultattive aerobes

facultative anaerobes

Answer 1

the electron acceptor is a compound that receives or accepts an electron during respiration or photosynthesis. All organisms get energy by transferring electrons from an electron donor to an electron acceptor. throughout this method (electron transport chain) the electron acceptor is reduced and therefore the electron donor is oxidized.
Photoautotrophic organisms are typically mentioned as holophytic. Such organisms derive their energy for food synthesis from light and are capable of using carbon dioxide as their principal supply of carbon.
Heterotrophs use energy from inorganic compounds to produce organic compounds and proteins from inorganic carbon dioxide.
Organisms during this anoxic system use the nitrate as an electron acceptor and release nitrogen in the form of gas or nitrogen oxides
these organisms use oxygen to metabolize substances, like sugars or fats, to get energy. in this kind of respiration, oxygen serves as the terminal electron acceptor for the electron transport chain.
Aerobes use oxygen and inorganic compounds as energy supply.
Obligate anaerobes metabolize energy through fermentation and anaerobic respiration. it uses an electron acceptor apart from oxygen within the electron transport chain.
The facultative aerobic bacterium doesn't need oxygen, however, will survive in presence of oxygen (generate adenosine triphosphate by aerobic respiration).
A facultative anaerobe produces adenosine triphosphate by aerobic respiration if oxygen is present, however, it can switch to fermentation or anaerobic respiration if oxygen is absent.