0
What else can I help you with?
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.
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.
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.
Will lipids give positive result for biuret est?
No, lipids will not give a positive result for the Biuret test. The Biuret test is specifically designed to detect the presence of proteins, as it reacts with peptide bonds in amino acids. Lipids, which are primarily composed of fatty acids and glycerol, do not contain these peptide bonds and therefore do not react in this test.
You are given two test tubes and told that one contains a protein and the other amino acid. Explain fully how you would identify the test tube that contains amino acid?
This may be wrong but I think you could use the biuret test as this would only give a positive result in the test tube with protein in
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.
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.
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.
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.
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.
Will lipids give positive result for biuret est?
No, lipids will not give a positive result for the Biuret test. The Biuret test is specifically designed to detect the presence of proteins, as it reacts with peptide bonds in amino acids. Lipids, which are primarily composed of fatty acids and glycerol, do not contain these peptide bonds and therefore do not react in this test.
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.
Will methionine give a positive Biuret test?
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.
If Biuret and Millon's test give positive result what is the conclusion?
If both Biuret and Millon's tests give a positive result, it suggests the presence of proteins in the sample. Biuret test is specifically for proteins containing peptide bonds, while Millon's test is used for identifying proteins with tyrosine residues. The positive results from both tests provide strong evidence for the presence of proteins in the sample.
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.
You are given two test tubes and told that one contains a protein and the other amino acid. Explain fully how you would identify the test tube that contains amino acid?
This may be wrong but I think you could use the biuret test as this would only give a positive result in the test tube with protein in
When a sample give negative result for ninhydrin and biuret test but the same sample give positive result for xanthoprotic testwhy?
A sample that gives negative results for both the ninhydrin and biuret tests suggests the absence of free amino acids and proteins, respectively. However, a positive result for the xanthoprotic test indicates the presence of aromatic amino acids, such as tryptophan or tyrosine, which can react with nitric acid to form a yellow compound. This discrepancy suggests that while the sample does not contain free amino acids or proteins in detectable amounts, it does contain aromatic amino acids bound within a structure that does not release them under the conditions of the ninhydrin or biuret tests.
