Question

a disaccharide found in table sugar - substrate that fits in the active site of sucrase.

Explanation:

The question is about identifying a disaccharide in table sugar (which is sucrose) that acts as a substrate for sucrase. Sucrose is a disaccharide, and it fits the active site of sucrase. Catalyst is a substance that speeds up reactions, Lock and Key Model is a theory about enzyme - substrate interaction, and Activation Energy is the energy needed to start a reaction. So the correct answer is Sucrose.

Answer:

D. Sucrose