Introduction to Biochemistry - Quiz 3.3.2

ATP synthesis is coupled to redox reaction with an ion gradient. This looks remarkably similar.

The final electron acceptor is not oxygen.

The availability of electron acceptors and fuel sources in the environment are the key factors to influence population of bacteria.

• Denitrifying bateria consumed the nitrate in the soil. 
• Plants are not growing as good as it was. 
• Farmer compensates with nitrate fertilizers (Economic impact)
• These fertilizers get washed to the ocean
• Phytoplankton grows much more than it was, consuming more oxygen. 
• Fishes die because of the lack of oxygen. (Environment impact) 

Protons are pumped from the cytoplasm to the periplasm by the action of complexes I and III.
Protons are consumed in the cytoplasm during reduction steps of denitrification.

6 oxygen atoms and 12 hydrogen atoms make 6 molecules of water, this is easy :)