Results:

• The seeds are removed from the petri dishes.
• A dark yellow-brown aqueous iodine solution is poured over the agar plates. Iodine solution is used to test whether starch hydrolysis has occurred. A colourless 'halo' around the seed halves indicates starch hydrolysis. Where starch is present, the iodine solution will turn from yellow-brown to blue-black.
• The skimmed milk plates are flooded with biuret reagent and left for 2 minutes.
• Biuret reagent is used to detect peptide bonds, following hydrolysis of protein molecules. A positive result for proteolytic hydrolysis occurs when the reagent changes from blue to violet. 
• The results of these treatments show that upon germination, the embryo begins to produce amylase and proteolytic enzymes.
• The boiled seeds, which act as a control, are unable to synthesise proteins, as they are dead.

Iodine test.

Biuret test.