Final Answer:
An organism gains a net total of 36 to 38 ATP molecules as a result of Aerobic Respiration.
Step-by-step explanation:
Aerobic respiration is a complex metabolic process that occurs in the presence of oxygen and involves glycolysis, the citric acid cycle (Krebs cycle), and oxidative phosphorylation (electron transport chain and chemiosmosis). In glycolysis, two ATP molecules are invested, and four ATP molecules are produced, resulting in a net gain of two ATP molecules. The citric acid cycle generates additional ATP through substrate-level phosphorylation. However, the majority of ATP is produced during oxidative phosphorylation, where electrons are transferred through the electron transport chain and create a proton gradient that drives ATP synthesis. The precise number of ATP molecules produced can vary slightly, leading to a net gain of approximately 36 to 38 ATP molecules per molecule of glucose.