Step 1: Understanding the Question:
This question tests knowledge of enzyme classification.
Step 2: Detailed Explanation:
Transferases (D) are enzymes that catalyse the transfer of functional groups (e.g., methyl, glycosyl, phosphate) from one molecule to another.
Examples: Kinases, transaminases.
Other classes:
- Isomerases (A): Catalyse isomerization reactions.
- Epimerases (B): Catalyse the inversion of stereochemistry at a specific carbon atom.
- Carboxylases (C): Catalyse carboxylation reactions.
Thus, transferases catalyse the transfer of functional groups.
Step 3: Final Answer:
Thus, the class of enzymes that catalyse the transfer of functional groups is transferases, which corresponds to option (D).
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