Question

indicate whether or not the following steps of glucose catabolism require oxygen.
glycolysis
citric acid cycle
electron transport chain
anaerobic process
aerobic process
reset

Explanation:

• Glycolysis: It can occur in the absence of oxygen (anaerobic). It is the first step of glucose catabolism where glucose is broken down into pyruvate.
• Citric acid cycle: It occurs in the mitochondrial matrix. Although it does not directly use oxygen, it requires the presence of oxygen for the electron transport chain (which is linked to it) to function. So, it is part of aerobic respiration.
• Electron transport chain: It directly uses oxygen as the final electron acceptor. So, it is an aerobic process.

Answer:

• Anaerobic Process: Glycolysis
• Aerobic Process: Citric acid cycle, Electron transport chain