Meldream

Err...perhaps I was not as clear as I could have been. I meant that I had one beaker with both amylase and starch, which might or might not have starch in it still. It did, however, have sugar. Now, I had another beaker with only starch. Sorry if this was not clear. I hope you will agree with me that there is supposed to be starch in a beaker that contains only starch. However, the iodine did not show any starch. There was no blue-black coloring; it remained brown. I am also fairly certain I put enough iodine into the solution. Oh, and I believe the solution's bottle said it was 1% starch.

Hi, as you can probably tell with one of those handy post counts (or the like), I am new here. Be nice. =) I am also a high school student (senior year :[ ) so forgive my ignorance regarding anything you say. Erm. I just have a quick question; I've performed an experiment to test for starch and sugar with amylase, starch, and glucose solution. And theory says there must be starch somewhere (it is starch solution. How can there not be starch? Unless there was a problem with starch, but I'll get to that later). I use iodine, and there is no starch. For any of my trials. And I really think the starch was fine, because I put amylase with the starch and it gave me sugar (tested using Benedict's reagent--it turned orange). Thus...there was starch, in my reasoning. As an added note, when I tested what should have had starch for sugar, no sugar was found either. This is a mystery to me. =/