Question

select all that apply

which of the following statements about enzymes are true?

• enzymes are not consumed in the reaction they catalyze.
• enzymes bind their substrate but are not changed in the reaction.
• enzymes lower the energy of activation for the reaction that they catalyze.
• enzymes are only able to be used once before becoming unstable.

Explanation:

Analyze enzyme consumption and stability

• Enzymes act as biological catalysts and are not consumed or permanently altered during the chemical reactions they accelerate.
• Because they remain unchanged, they can be reused repeatedly for subsequent reactions rather than being used only once.

Analyze substrate binding and activation energy

• Enzymes bind specifically to their substrates at the active site to form an enzyme-substrate complex, facilitating the reaction without undergoing permanent changes themselves.
• They accelerate reactions by lowering the activation energy barrier required for the transition state to form.

Answer:

• Enzymes are not consumed in the reaction they catalyze. (Correct answer)
• Enzymes bind their substrate but are not changed in the reaction. (Correct answer)
• Enzymes lower the energy of activation for the reaction that they catalyze. (Correct answer)
• Enzymes are only able to be used once before becoming unstable.