Which of the Following Substrates is an Electron Donor in Organotrophy

Question

Which of the following substrates is an electron donor in organotrophy? A) Fe²⁺ B) succinate C) NO2 D) H2 E) H2O

Accepted Answer

Succinate is a substrate that can donate electrons in organotrophy by undergoing oxidation-reduction reactions with electron acceptors. The other substrates listed are not electron donors but are involved in other metabolic processes.