Assertion (A) An optically active amino acid can exist in three forms depending on the pH of the solution.

Reason (R) Amino acids contain both acidic and basic groups, they exist as Zwitter ion in aq. medium, anionic form in acidic medium and cationic form in basic medium.

Identify the product of the following reaction.

During the action of enzyme ‘zymase’ glucose is converted into .............., with the liberation of carbon dioxide gas.