A. Krebs cycle
A.
B. Glycolysis
B.
C. Electron transport chain
C.
D. Oxidative phosphorylation
D.
Correct Answer: B
সঠিক উত্তর: B
Explanation
ব্যাখ্যা
Glycolysis is the initial stage of both aerobic and anaerobic respiration, where glucose is broken down into pyruvate molecules.