In agricultural soils, nitrification is a vital multi-step aerobic process performed by chemoautotrophic bacteria to convert ammonia into forms of nitrogen readily absorbed by plants.
Which chemical equation represents the specific reaction carried out by nitrite-oxidising bacteria, such as Nitrobacter, during this process?
2NO2−+O2→2NO3−2\text{NO}_2^- + \text{O}_2 \rightarrow 2\text{NO}_3^-2NO2−+O2→2NO3−
2NH4++3O2→2NO2−+4H++2H2O2\text{NH}_4^+ + 3\text{O}_2 \rightarrow 2\text{NO}_2^- + 4\text{H}^+ + 2\text{H}_2\text{O}2NH4++3O2→2NO2−+4H++2H2O
N2+8H++8e−→2NH3+H2\text{N}_2 + 8\text{H}^+ + 8\text{e}^- \rightarrow 2\text{NH}_3 + \text{H}_2N2+8H++8e−→2NH3+H2
2NO3−+12H++10e−→N2+6H2O2\text{NO}_3^- + 12\text{H}^+ + 10\text{e}^- \rightarrow \text{N}_2 + 6\text{H}_2\text{O}2NO3−+12H++10e−→N2+6H2O
37 exam-style questions on OCR A A Level Biology Ecosystems. Each one has a worked solution and a mark scheme showing where the marks go.