Which energy-producing process is thought to have come first during cellular evolution?
A) Photosynthesis
B) Glycolysis
C) Oxidative phosphorylation
D) Proteolysis

Question

Quizplus · Accepted Answer

Glycolysis is thought to have come first during cellular evolution due to its simplicity and the fact that it occurs in all organisms, including anaerobic bacteria. Photosynthesis and oxidative phosphorylation are more complex and rely on specific organelles (chloroplasts and mitochondria, respectively), which were not present in the earliest cells. Proteolysis is not an energy-producing process.

Which Energy-Producing Process Is Thought to Have Come First During