Explain the following terms :
(i) Invert sugar
(ii) Polypeptides.

Answer

The product formed on the hydrolysis of sucrose with dilute acids or enzyme invertase is called invert sugar These are known so because sign of rotation changes from dextro `(+)` to lavevo `(-)`
(ii) Two amino acids combine to form a peptide bond When the number of combining amino acids is more than ten the product obtained is known as polypeptide .

Explanation

Maltose will give positive test with fehling reagent but benzaldehyde does not give fehling test.