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The answer is no. Not sure why at the moment but a question on my homework for Biology lab asks why did lysine not react to the biuret's solution.
If I had to guess it would be because Biuret's test is for peptide bonds in proteins and, lysine is just an amino acid not an actual protein, hence no peptide bonds. This is what I have concluded from just thinking about it. Not one hundred percent sure.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agoYes Because, it contains sulfur. Methionine is one of the essential amino acids, and as such is not synthesized by the human body. Methionine is one of only two amino acids that contains a sulfur group, important for methionine's role in the pathway of glutathione "charging".
Wiki User
∙ 9y agoThe Biuret test will give a positive for peptide bonds. Methionine is a free amino acid and does not have peptide bonds.
Wiki User
∙ 11y agoYes. The colour will become purplish-pink.
Wiki User
∙ 14y agono
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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.
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.
Would glucose give a positive result with the Biuret test?
No because glucose does not consist of two or more peptide bonds
Would cysteine test positive in a biuret test?
no! no change in colour confirms presence of cysteine
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.
Methionine give a positive sulfur test?
yes
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.
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
What is the color of biruet solution?
The biuret solution used in the biuret test for peptide bonds is blue in the absence of peptide bonds or biuret which also results in a positive result. A positive result for peptide bonds or biuret is apparent as the biuret solution turns purple/violet in color.
