Final answer:
Sucrose is not a product of fermentation; it is a substrate that can be broken down during fermentation. The other options listed (lactate, CO2, ethanol, NAD+) are all products of either alcoholic or lactic acid fermentation. Option E) sucrose is the correct answer.
Step-by-step explanation:
The question asks which of the given options is not a product of fermentation. Fermentation is a metabolic process that occurs in the absence of oxygen (anaerobic). There are two main types of fermentation: alcoholic fermentation and lactic acid fermentation.
In alcoholic fermentation, which occurs in yeast and some types of bacteria, glucose is converted into ethanol and carbon dioxide (CO2). This process also regenerates the coenzyme NAD+ from NADH, allowing glycolysis to continue. In lactic acid fermentation, which occurs in some bacteria and animal cells, glucose is converted into lactic acid.
Based on the information provided, we can deduce that lactate (a form of lactic acid) is a product of lactic acid fermentation, CO2 and ethanol are products of alcoholic fermentation, and NAD+ is regenerated during both types of fermentation. Therefore, these are all products of fermentation. However, sucrose is not a product but a disaccharide sugar that could be a substrate for fermentation. Hence, the correct option is E) sucrose, as it is not a product of fermentation.