How you would text a gingerbread biscuit solution for the presence of starch sugar and protein?

To test a gingerbread biscuit for the presence of starch, sugar, and protein, you can use specific biochemical tests. For starch, perform the iodine test by adding a few drops of iodine solution; a blue-black color indicates starch presence. For sugar, use Benedict’s test by mixing the sample with Benedict's reagent and heating it; a color change to brick red signifies reducing sugars. To test for protein, employ the Biuret test by adding Biuret reagent; a violet color indicates the presence of proteins.