Final answer:
The correct sequence of events during glucose respiration in the absence of oxygen is Glycolysis followed by Fermentation. The Citric Acid Cycle and Oxidative Phosphorylation require oxygen and thus are not included in this anaerobic process.
Step-by-step explanation:
When considering the process of cellular respiration in the absence of oxygen, the correct ordering of the events that occur during the respiration of glucose is Glycolysis; Fermentation.
Glycolysis is the first step in the breakdown of glucose to extract energy for cellular metabolism. This stage occurs in the cytoplasm and does not require oxygen, making it anaerobic. It results in the production of pyruvate, which is then used in fermentation to replenish the NAD+ needed for glycolysis to continue in the absence of oxygen. Fermentation allows for ATP production under anaerobic conditions. The Citric Acid Cycle and Oxidative Phosphorylation, which are subsequent stages of cellular respiration, do require oxygen and thus do not take place in the absence of oxygen.
Therefore, the correct sequence is D. Glycolysis; Fermentation, clearly indicating that citric acid cycle and oxidative phosphorylation are not part of anaerobic respiration.