Which of the following are true of denitrification There is
     Which of the following are true of denitrification? There is more than one correct answer, please select all options that apply to receive credit.  The electron donor must have a more negative reduction (E degree\') potential than nitrate.  The electron donor must have a more positive reduction (E degree\') potential than N_2O  ATP is generated by ATP synthase  Most ATP is generated by substrate level phosphorylation  Denitrification can produce more free energy than aerobic respiration  Some denitrifiers can reduce NO_3^- to N_2 
  
  Solution
The options which are true for denitrification are
The electron donor must have a more negative reduction potential than nitrate.
Some denitrifiers can reduce NO3- to N2
Denitrification is the process where nitrate is reduced to produce molecular nitrogen through intermediate gaseous nitrogen products.

