Unit 8 Enzymes and Metabolism

Front

What is the induced fit model in enzyme activity?

Back

The induced fit model describes how an enzyme changes shape when a substrate binds to its active site, leading to a better fit and facilitating the reaction.

Front

What happens to enzyme stability at temperatures above the optimum temperature?

Back

Enzyme stability decreases as thermal energy disrupts hydrogen bonds.

Front

What does it mean for enzymes to be immobilized in industrial applications?

Back

Immobilized enzymes are fixed in place, allowing for repeated use in catalysis without being washed away.

Front

What is the function of lactase?

Back

Lactase is the enzyme that hydrolyzes lactose into glucose and galactose.

Front

What products are formed when catalase hydrolyzes hydrogen peroxide?

Back

Catalase hydrolyzes H2O2 into water (H2O) and oxygen (O2).

Front

Define enzyme specificity.

Back

Enzyme specificity refers to the ability of an enzyme to select and catalyze a specific substrate among many possible candidates.

Front

What factors can affect enzyme activity?

Back

Factors include temperature, pH, substrate concentration, and the presence of inhibitors or activators.

Front

Explain the role of cofactors in enzyme activity.

Back

Cofactors are non-protein molecules that assist enzymes in catalyzing reactions, often by stabilizing the enzyme or substrate.

Front

What is the difference between competitive and non-competitive inhibition?

Back

Competitive inhibition occurs when an inhibitor competes with the substrate for the active site, while non-competitive inhibition occurs when an inhibitor binds to a different site, altering enzyme function.

Front

How does pH affect enzyme activity?

Back

Each enzyme has an optimal pH range; deviations can lead to decreased activity or denaturation.