What can you conclude about the molecular makeup of potatoes and onions based on the test you performed?

Based on the test performed, we can conclude that potatoes primarily contain starch, as indicated by a positive reaction with iodine, which turns blue-black in the presence of starch. In contrast, onions exhibit a higher concentration of sugars, as evidenced by a positive reaction with Benedict's solution, which indicates the presence of reducing sugars. This difference in molecular makeup highlights the distinct nutritional profiles of potatoes and onions, with potatoes being a significant source of carbohydrates and onions contributing more to sugars.