Biomolecules Test - 8

α-D-glucose and β-D-glucose are both anomers because they differ in the orientation of the hydroxyl group at only C₁. On the other hand, epimers have several chain carbons differing in configuration about any chiral centre, not necessarily at C₁.

Thus, all the anomers are epimers, but all the epimers are not anomers.

Both have a pyranose structure and both are dextrorotatory, but with a different optical rotation.

Amino acids are classified as acidic, basic or neutral depending upon the relative number of amino and carboxyl groups in their molecules. Equal numbers of amino and carboxyl groups - make it neutral; more carboxyl groups as compared to amino groups - makes it acidic, and more number of amino groups than carboxyl groups - makes it basic. Out of the given amino acids, Aspartic acid is an acidic amino acid, Histidine is a basic amino acid, while Leucine and Valine are neutral amino acids.

CH₂OH(CHOH)₄CHO + 5HIO₄ → 5HCO₂H + HCHO.
So, the number of moles of HIO₄ required is 5.

1. Enzymes have maximum reactivity at optimum temperature.
2. Enzymes are proteins with specific structures.
3. Enzymes reduce the activation energy for a reaction but they do not affect the equilibrium constant.