What would happen if Benedict's Solution or Biuret's Solution is added to this?

Question

what if hose chemicals are added to Urine? like would let me identify proteins, sugars, phosphates, or any red blood cells? or like in general can it tell me anything about that persons diseases?(related to the kidney)
Its for my bio. class and i dont know what to do!!

Answer 1

Ivorytower was right -- the biuret test detects proteins, and benedicts solution detects simple monosachharides, like glucose (althrough, benedicts test does not detect all sugars).

Typical human urine contains water, ions and urea. Plasma proteins are too large to filter out from the blood in the kidneys. Glucose, and other sugars, are filtered out of the blood --along with a large amount of water-- passing into the kidney filtrate. Sugars are re-absorbed, however, from the kidney filtrate, and are not, normally, lost in urine. Urine typically has no protein present, and traces of sugars --but not much. The biuret and benedict's test should fail, therefore.

There is an exemption to this. People suffering from diabeties have high blood concentrations of glucose, because they can't propely regulate its concentration. The kidney can not cope with the strain of high concentartions of glucose in the blood, and is unable to re-absorb all the glucose from the filtrate. Glucose, and other sugars, are lost in urine, and benedict's test would give a positive.

Answer 2

benedict's detects simple sugars (has to be heated; a good test for diabetes)

biuret's detects proteins