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Casein form a purple compound in the biuret test.
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∙ 7y ago
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What colour is biuret before test?
Blue!!
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.
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.
Test for protein in food?
The Biuret reagent can be used.
Would cysteine test positive in a biuret test?
no! no change in colour confirms presence of cysteine
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 is the name of the test for proteins?
The biuret test
Does pepsin test positive in biuret test?
No
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.
What test would you run to test for the presence of a polypeptide?
Biuret test
What might Biuret reagent test in a practical real life situation?
Biuret reagent test in a practical situation tests for lipids. Biuret is used in food agents for protein amino acid chains.
How you test if foods have proteins?
The Biuret test allows one to test for proteins.
What colour is biuret before test?
Blue!!
Will glutamic acid give a positive biuret test?
Amino acids doesn't react with the biuret reagent.
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.
What is the reagent used to test proteins?
Buiret Reagent
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.
