Question

Which of the following cellular metabolic processes can occur both in the presence or absence of $O_2$?

• A. Glycolysis
• B. Fermentation
• C. TCA cycle
• D. Electron transport coupled with chemiosmosis

Answer 1

The correct option is A Glycolysis

Glycolysis is an oxidative process in which one molecule of glucose is partially oxidised into two molecules of pyruvate in a series of enzyme catalysed reactions. Glycolysis, the major pathway for glucose metabolism, occurs in the cytosol of cells. It is a unique pathway that occurs aerobically as well as anaerobically and does not involve molecular oxygen.