Question

 

Please explain what is a faculative aerobic organism is that uses nitrate and serves as an electron acceptor. How does the cell make ATP and explain the pathway it uses in detail with the transporting mechanisms from the environment into the cell.

How does a facultative organism that lacks oxygen but is rich in nitrate which can serve as a terminal electron acceptor work. What are the pathways in must take to produce ATP? Details are need the starting products, ending products, ETC components, where do the pathways occur ans its transport mechanism from the environment to the host.

Answer 1

Facultative aerobic organisms are those which can live in the presence of oxygen, but does not require it.A facultative aerobe is an organism that makes ATP by anaerobic respiration.These organisms obtain their energy by oxidizing electron donor.An energy source is the oxidizing energy of chemical compounds.They use inorganic energy to synthesize organic compounds from carbon dioxide.

Here final Hydrogen or electron acceptor is an inorganic substance such as nitrate, sulfate etc.

Facultative aerobes uses Substrate level Phosphorylation and Oxidative Phosphorylation to generate ATP. These terminal electron acceptors have smaller reduction potentials than O2, meaning that less energy is released per oxidized molecule.

Anaerobic cellular respiration generates ATP in very different ways. Anaerobic respiration utilizes highly reduced chemical compounds such as NADH (for example, produced during glycolysis) to establish an electrochemical gradient (often a proton gradient) across a membrane. This results in an electrical potential or ion concentration difference across the membrane.The reduced chemical compounds are oxidized by a series of respiratory integral membrane proteins with sequentially increasing reduction potentials.A proton motive force drives protons down the gradient (across the membrane) through the proton channel of ATP synthase. The resulting current drives ATP synthesis from ADP and inorganic phosphate.

examples are Chemolithotrophs

the p/o ratio for oxidative phosphorylation are probably around 1.0

Reversed Electron Flow is the process ETC.