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Does phenol give a positive biuret test?
No. The Biuret test only gives a positive result if a peptide bond exists. Phenol doesn't have a peptide bond, so it will not give a positive test.
How many of these chemical groupings must be present in a molecule to give a positive biuret test?
you should have at least 2 of these,to obtain a positive result in Biuret's test. because biuret test is a test used to detect if there is peptide linkages.
Will glutamic acid give a positive biuret test?
Amino acids doesn't react with the biuret reagent.
Did gelatin give positive result with xanthoprotic test?
yes,it give positive test
Which sample gives a negative Biuret test and why?
Gelatin and egg albumin.
Does pepsin test positive in biuret test?
No
If Biuret and Millon's test give positive result what is the conclusion?
The conclusion is that the sample contain proteins.
Would albumin give a positive biuret test?
Hey. okay.. the biuret test is a test for peptide bonds. when CuSO4 is added to KOH, an alkaline solution, nitrogen atoms from the peptide bond forms a purple compound with the Cu2+ ions. hope this helps! read it in a text book.
Is biuret test suitable to test the presence of proteins in the urine?
Yes, the biuret test will indicate the presence of peptides. If it turns violet, it is a positive result.
What color is a positive test for protein?
A positive test, when using Biuret reagent, would be purple-ish
How many chemical grouping must be present in a molecule to give a positive Biuret Test?
You must have at least two, those that will form the peptide linkage (NH2 and COOH) since Biuret test is for detecting peptide linkages.
Would glucose give a positive result with the Biuret test?
No because glucose does not consist of two or more peptide bonds
