In computational complexity theory, a problem refers to the abstract question to be solved. In contrast, an instance of this problem is a rather concrete utterance, which can serve as the input for a decision problem. For example, consider the problem of primality testing.
Oxygen plays a vital role in both the aerobic and anaerobic metabolic systems. While oxygen is required as a direct energy source in the aerobic system, it is also essential in clearing the blood of excess lactic acid buildup in the anaerobic system.
When one glucose molecule is converted into lactic acid in anaerobic metabolism, three ATP molecules are generated. When a glucose molecule is converted into carbon dioxide and water via aerobic metabolism, it produces 39 molecules of ATP.However, glycolysis requires powerful enzymes that compensate for the lower energy efficiency of anaerobic metabolism. What limits the anaerobic process is the byproduct, or lactic acid.n the case of anaerobic metabolism, pyruvate enters the fluid, or cytoplasm, of the cell and is turned into lactic acid via a process called glycolysis. While aerobic metabolism uses fat, protein and carbohydrates and can continue indefinitely, anaerobic metabolism uses only carbohydrates and doesnât last long.