Test Index

Biomolecules Part 1

Section: Chemistry

Question : 87 of 100

Marks: +1, -0

Solution:

Biuret test produces violet colour on addition of dilute

\mathrm{CaSO}_4

to alkaline solution of a compound containing peptide linkage.

Polypeptides, proteins and urea have -

-\underset{\mathrm{O}}{\underset{\parallel}{\mathrm{C}}}-\mathrm{NH}-

(peptide) linkage while carbohydrates have glycosidic linkages. So, test of carbohydrates should be different from that of other three.

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