<prompt> All of the following moleculesenzymes may contribute in generating free oxygen radicals within neutrophils for killing intracellular bacteria, except-Nitric oxideFentons reactionNADPH oxidaseCatalase  <response>: Catalase, present in peroxisomes, catalyzes the decomposition of hydrogen peroxide 2H2O2 - O2 2H2O. It is one of the most active enzymes known, capable of degrading millions of molecules of H2O2 per second. iNOS, the type that is involved in microbial killing, is expressed when macrophages are activated by cytokines e.g., IFN-gor microbial products, and induces the production of NO. 