Based on the results in the chart above, which macromolecule(s) is/are present in the water solution?

Question

iosangel · Answer

https://prnt.sc/pbgon7

mhchen · Answer

Do you know which macromolecule react with iodine, and which ones react with Biuret?

iosangel · Answer

no

JSVSL7 · Answer

I did this a while back, so I might be a bit fuzzy on this.

So there are 4 main macromolecule indicative tests: Benedict's, Iodine, Stain, and Biurets. 
Benedict's - If it is orange or bronze, it tests positive for simple carbohydrate (ie monosaccharide)
Biuret - If it is purple or black, it is positive for protein
Iodine - If it is black or dark blue, it's a polysaccharide
Stain -  if there is an oily residue, it's a lipid, otherwise it isn't

So You can use this as a guide. I'll do the first one, water.
Water's iodine is brown, so it has no polysaccharides. And the biuret test shows it's blue, so it isn't a protein either.