The enzymes which catalyse the interconversion of aldose and ketose sugars are

Correct option is A

The correct answer is (A) Isomerases

Explanation:
• Isomerases are a general class of enzymes that convert a molecule from one isomer to another. They facilitate structural rearrangements within a single molecule.
• Specifically, the interconversion between an aldose (sugar with an aldehyde group, like glucose) and a ketose (sugar with a ketone group, like fructose) is catalyzed by a sub-class called isomerases (e.g., phosphoglucose isomerase).
• This process is vital in metabolic pathways like glycolysis, where Glucose-6-phosphate is converted to Fructose-6-phosphate.

Information Booster:
• Enzymes are classified into six main groups by the International Union of Biochemistry: Oxidoreductases, Transferases, Hydrolases, Lyases, Isomerases, and Ligases.
• Isomerization often involves shifting a double bond or moving a functional group within the molecule without changing the chemical formula.

Additional Knowledge:
• Epimerases (Option B): A sub-type of isomerase that catalyzes the inversion of configuration at a specific chiral center (e.g., converting glucose to galactose).
• Carboxylases (Option C): Enzymes that catalyze the addition of a carboxyl group ($CO_2$) to a substrate.
• Transferases (Option D): Enzymes that transfer a functional group (like a methyl or phosphate group) from one molecule to another.