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What is the result of testing sausage for protein using the biuret test?
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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 does biuret solution test for protein?
Proteins are made of peptide bonds which is the target of reaction for biuret test. It's not truly specific for proteins; biuret itself also gives a positive result (hence the name of the test). However, proteins are fairly common and biuret (and similar peptide-containing compounds) are relatively rare.
What color does biuret turns if protein is present?
purple for longer peptides (larger proteins) and pink for shorter ones
What are the biuret test results for egg albumin?
Yes. The Biuret test is a test for the presence of peptide bonds. Since albumin is a class of protein, and proteins are composed of many amino acids joined together by peptide bonds, the test will yield a positive result.
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.
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 is the chemical indicator used to test protein?
To test for protein. Biuret or solutions of sodium hydroxide and copper sulfate. Tested with a dropper a + result will be purple or something
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 test indicator is used to detect protein?
To test for protein. Biuret or solutions of sodium hydroxide and copper sulfate. Tested with a dropper a + result will be purple or something
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.
How does biuret solution test for protein?
Proteins are made of peptide bonds which is the target of reaction for biuret test. It's not truly specific for proteins; biuret itself also gives a positive result (hence the name of the test). However, proteins are fairly common and biuret (and similar peptide-containing compounds) are relatively rare.
What is the result when albumin solution pepsin and HCl are mixed with biuret reagent?
The reagent turns pink due to the presence of broken amino acid chains of the albumin, a source of protein.
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.
What color does biuret turns if protein is present?
purple for longer peptides (larger proteins) and pink for shorter ones
What are the biuret test results for egg albumin?
Yes. The Biuret test is a test for the presence of peptide bonds. Since albumin is a class of protein, and proteins are composed of many amino acids joined together by peptide bonds, the test will yield a positive result.
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 chemical tests can be used to identify proteins?
You could use a biuret test, because a positive result (signified by the presence of pink-violet color) indicates the presence of a protein with two or more peptide bonds. If such a protein is not present, the blue color of the cupric sulfate (which indicates a negative result) will remain.
