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The conclusion is that the sample contain proteins.

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11y ago

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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.


Does pepsin test positive in biuret test?

Pepsin does not test positive in the biuret test. The biuret test is used to detect the presence of proteins in a solution, which contain peptide bonds. Pepsin is an enzyme that breaks down proteins into smaller peptides, so it does not give a positive result in the biuret test.


Does phenol give a positive biuret test?

No, phenol does not give a positive biuret test. The biuret test is used to detect the presence of proteins, not phenol. Phenol is a type of organic compound that does not contain the peptide bonds that the biuret test reacts with.


Would glucose give a positive result with the Biuret test?

No, glucose would not give a positive result with the Biuret test. The Biuret test is specific for detecting proteins, not sugars like glucose. It works by reacting with peptide bonds in proteins to form a colored complex.


How many of these chemical groupings must be present in a molecule to give a positive biuret test?

At least two peptide bonds must be present in a molecule to give a positive biuret test. The biuret reagent interacts with peptide bonds in proteins, forming a colored complex that can be detected visually.


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.


How do you tell if a substance contains protein by using biuret test?

If Biuret Reagent is related to the presence of Protein macromolecules, then a positive result will change it's colour from blue to violet.


What type of bond is necessary to obtain a positive Biuret result?

A positive Biuret test indicates the presence of peptide bonds, which are formed between amino acids in proteins. The Biuret reagent reacts with these peptide bonds, resulting in a color change that typically shifts to purple. This test is used to assess protein concentration in a sample.


What color will a peptide bond be after using the Biuret test?

in biuret test the presence of peptide bonds gives a violet color. but it should be noted that a minimum of two peptide bonds should be present in the protein to get a positive answer to this test.


Will Alanine give a negative Biuret test?

Yes, alanine will give a negative Biuret test. The Biuret test is used to detect the presence of proteins, which are made up of long chains of amino acids. Since alanine is a single amino acid, it will not give a positive response in the Biuret test.


What organic compound does biurets test for?

Biuret test detects the presence of proteins in a sample by reacting with peptide bonds. When the biuret reagent comes in contact with proteins or peptides containing two or more peptide bonds, a color change to purple occurs, indicating a positive result for the presence of proteins.


Why does glycine test positive on biurets amino acid testing?

It shouldn't test positive. The Biuret test is only positive for a peptide or protein with 2 or more peptide bonds. Glycine is an individual amino acid. You'll see the blue from the Cu2+ with Glycine, but that's a negative result. A violet color is the positive.