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No because glucose does not consist of two or more peptide bonds

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12y ago

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Which sample gives a negative Biuret test and why?

Gelatin and egg albumin.


Would cysteine test positive in a biuret test?

Yes, cysteine would test positive in a biuret test. This is because cysteine, like other amino acids, contains peptide bonds that react with the copper ions in the biuret reagent to form a purple color complex.


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 color is a positive test for protein?

A positive test for protein typically appears as a violet or purple color when using chemical indicators such as Biuret reagent. This color change indicates the presence of proteins in the test sample.


What is the results biuret test for egg albumin?

The biuret test for egg albumin would give a positive result, showing a violet color change, indicating the presence of peptide bonds in the protein structure. This test is used to confirm the presence of proteins in a solution based on the color change that occurs in the presence of peptide bonds.


What type of food will give a negative Iodine test and a positive Biuret Solution test?

An iodine test is used to test for the presence of starch (or polysaccharides, specifically amylose or amylopectin). A Biuret solution test is used as an indicator for peptide bonds within proteins. Therefore, if you get a negative iodine test and a positive Biuret test, you would probably be testing a animal food source (beef, chicken, pork). Overall, any food that doesn't have starch present within it would be appropriate to use. Hope this helps!


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.


Does starch gives positive result for Benedict test?

Starch is made up of repeating glucose units. Though it is a non reducing sugar, its hydrolysis gives out pure glucose, which is known as dextrose. And glucose, as we know, is a reducing sugar and hence would give a positive result in Benedict's test.


What test that would be able to distinguish between glucose and ribose?

Benedict's test can distinguish between glucose and ribose. Glucose will give a positive result by forming a colored precipitate, while ribose will not react with Benedict's reagent, remaining clear blue.


Will gelatin give a positive Biuret test?

yes Gelatin will have a positive biuret test. this is because it has an amide group which bends over the copper ion giving the colour pink or violet off to the visual eye.


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


What would the increase of insulin result to?

a decrease in the amount of glucose in the blood