Plays a role in oxygen metabolism in the mitochondria by regulating the levels of reactive oxygen species (ROS) thereby conferring resistance to oxidative stress (PubMed:7152245, PubMed:8350650, PubMed:8169328, PubMed:21895890). Involved in resistance to P.aeruginosa PA14 infection (PubMed:9989496). Regulates lifespan (PubMed:8169328). Expressed in pharynx, muscles and intestine. Under hyperoxic conditions or low temperature (16 degrees Celsius), lifespan, body size and fertility are severely reduced and sexual maturity and egg hatching are delayed (PubMed:8350650, PubMed:8169328). Slight increase in the number of apoptotic cells at the embryonic comma stage (PubMed:21895890). Also shows strong susceptibility to UV irradiation and paraquat treatment. Does not show increased sensitivity to X-ray radiation (PubMed:7152245, PubMed:8350650). Increased sensitivity to P.aeruginosa PA14-mediated killing (PubMed:9989496). Body wall muscle mitochondria appear enlarged and abnormal with less developed cristae in hypoxic or hyperoxic conditions (PubMed:21895890). Belongs to the zinc-containing alcohol dehydrogenase family. Quinone oxidoreductase subfamily.