Question

the oxygen consumed during cellular respiration is involved directly in which process or event?
glycolysis
accepting electrons at the end of the electron transport chain
the citric acid cycle
the oxidation of pyruvate to acetyl coa
the phosphorylation of adp to form atp

Explanation:

Cellular respiration has several stages. Glycolysis occurs in the cytoplasm and does not directly use oxygen. The citric acid cycle takes place in the mitochondrial matrix and also does not directly consume oxygen. The oxidation of pyruvate to acetyl - CoA is an intermediate step between glycolysis and the citric acid cycle and does not directly involve oxygen. The phosphorylation of ADP to form ATP can occur through substrate - level phosphorylation (not requiring oxygen) or oxidative phosphorylation (indirectly related to oxygen). In the electron transport chain (ETC), electrons are passed through a series of carriers. At the end of the ETC, oxygen acts as the final electron acceptor. The reaction is \(O_2 + 4e^-+4H^+\to2H_2O\).

Answer:

accepting electrons at the end of the electron transport chain