A substrate

Question

A substrate

Quizplus · Accepted Answer

A substrate is a molecule that fits into the active site of a specific enzyme. The enzyme then catalyzes a chemical reaction between the substrate and another molecule, lowering the energy of activation required for the reaction to occur. Therefore, option A is correct. Option B is incorrect as substrates do not typically fit into the active site of another substrate. Option C is incorrect as substrates do not themselves catalyze chemical reactions. Option D is incorrect as substrates can be any type of molecule, not just proteins. Option E is partially correct but does not fully describe the role of a substrate. While a substrate does lower the energy of activation, it requires an enzyme to do so and does not do so on its own.

A Substrate