Question

a (blue) and b (orange) are a before and after for a chemical test. which macromolecule reagent test was most likely performed? dische diphenylamine sudan iii lugol’s iodine benedict’s biuret

Explanation:

Benedict's reagent is used to test for reducing sugars. It is blue initially (like tube A). When heated with a reducing sugar, it changes color. The orange - red color in tube B is consistent with a positive Benedict's test. Dische Diphenylamine is for DNA (blue - green color change), Sudan III for lipids (red - orange), Lugol's iodine for starch (blue - black), and Biuret for proteins (violet).

Answer:

Benedict's