Understanding Enzymes and Their Function

What is the primary role of enzymes in chemical reactions?

• To increase the temperature of the reaction

• To provide energy for the reaction

• To speed up reactions by lowering activation energy

• To change the products of the reaction

What is activation energy?

• The energy that stops a reaction

• The energy released during a reaction

• The energy required to start a reaction

• The energy stored in products

How do enzymes affect the activation energy of a reaction?

• They increase the activation energy

• They decrease the activation energy

• They eliminate the need for activation energy

• They have no effect on activation energy

In the context of enzyme action, what is a substrate?

• The product of a reaction

• The enzyme itself

• The molecule that an enzyme acts upon

• The energy required for a reaction

How do enzymes lower activation energy in a reaction involving two substrates?

• By increasing the temperature

• By changing the pH

• By bringing substrates together in the correct orientation

• By adding more substrates

What happens to the products after an enzyme-catalyzed reaction?

• They are released from the enzyme

• They remain bound to the enzyme

• They deactivate the enzyme

• They are converted back to substrates

What is a metabolic pathway?

• A method of enzyme production

• A pathway for energy transfer

• A series of chemical reactions in a cell

• A single chemical reaction

Why do metabolic pathways require multiple enzymes?

• Each step requires a different enzyme

• Enzymes are reused in each step

• Enzymes are not involved in metabolic pathways

• Only one enzyme is needed for all steps

What is glycolysis?

• A process of breaking down glucose into pyruvates

• A method of enzyme synthesis

• A type of enzyme

• A form of energy storage

What is the key idea about how enzymes work?

• They change the products of reactions

• They slow down chemical reactions

• They increase the energy of reactions

• They lower the activation energy required