Final answer:
In anaerobic respiration, an organism gains a net total of two ATP molecules from one molecule of glucose due to the process of glycolysis.
Step-by-step explanation:
An organism will typically gain two ATP molecules as a result of the anaerobic respiration process, specifically through the pathway of glycolysis. Anaerobic respiration occurs when oxygen is not present, and therefore, the electron transport chain cannot function. During glycolysis, a total of four ATPs are created, but two ATPs are consumed in the early stages of this pathway, resulting in a net gain of two ATP molecules from one molecule of glucose under anaerobic conditions.