Which catabolic processes may have been used by cells on ancient Earth before free oxygen became available?
A)only glycolysis and fermentation
B)only glycolysis and the citric acid cycle
C)only glycolysis and pyruvate oxidation
D)only oxidative phosphorylation,using an electron acceptor other than oxygen
E)glycolysis,pyruvate oxidation,the citric acid cycle,and oxidative phosphorylation,using an electron acceptor other than oxygen

Question

Quizplus · Accepted Answer

Glycolysis, pyruvate oxidation, the citric acid cycle, and oxidative phosphorylation, using an electron acceptor other than oxygen, are all catabolic processes that may have been used by cells on ancient Earth before free oxygen became available.

Which Catabolic Processes May Have Been Used by Cells on Ancient