BIOLOGY
AMINO ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Tollens test
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Buret test
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Frederiks test
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None of the above
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Detailed explanation-1: -The biuret test is a chemical test that can be used to check for the presence of peptide bonds in a given analyte. Therefore, the biuret test can also be used to gauge the amount of protein present in the analyte.
Detailed explanation-2: -Biuret is a compound formed by heating urea to 180° C. When biuret is treated with dilute copper sulfate in alkaline condition, a purple colored compound is formed. This is the basis of biuret test widely used for identification of proteins and amino acids.
Detailed explanation-3: -Only amino acid, Histidine, gives a positive result.
Detailed explanation-4: -Both the Benedict’s test for reducing sugar and the iodine for starch help to check (04’30”) for this type of organic macromolecules including the sugars and carbohydrates. The next test is the Biuret test for protein. The Biuret test for protein essentially is going to check for the presence of the amino group.