What term describes the property of enzymes that allows them to act on only one particular substrate?

What term describes the property of enzymes that allows them to act on only one particular substrate?

• A. Enzyme specificity
• B. Optimum
• C. Aerobic
• D. Protease enzyme

Answer: (A)

Enzyme specificity is the property that allows enzymes to act on only one particular substrate because the active site is shaped to fit that molecule’s geometry and chemical groups. The interaction between enzyme and substrate is like a key fitting into a lock, and once bound, the enzyme catalyzes the reaction specific to that substrate. Sometimes the fit is adjusted slightly as the substrate binds, a concept known as induced fit, which helps lower the activation energy and makes the reaction more efficient. This specificity explains why a given enzyme, such as sucrase, acts on sucrose and not other molecules. The other terms refer to different ideas: optimum means the best conditions for activity (temperature, pH, etc.), aerobic describes needing oxygen, and protease is a type of enzyme that digests proteins, not a property of enzymes themselves.

Enzyme specificity is the property that allows enzymes to act on only one particular substrate because the active site is shaped to fit that molecule’s geometry and chemical groups. The interaction between enzyme and substrate is like a key fitting into a lock, and once bound, the enzyme catalyzes the reaction specific to that substrate. Sometimes the fit is adjusted slightly as the substrate binds, a concept known as induced fit, which helps lower the activation energy and makes the reaction more efficient. This specificity explains why a given enzyme, such as sucrase, acts on sucrose and not other molecules. The other terms refer to different ideas: optimum means the best conditions for activity (temperature, pH, etc.), aerobic describes needing oxygen, and protease is a type of enzyme that digests proteins, not a property of enzymes themselves.