Which of the Following Is True of Enzymes

question 29

Multiple Choice

Which of the following is true of enzymes?

• A) They lower the activation energy for a chemical reaction.
• B) They speed up the rate of a chemical reaction.
• C) both a and b
• D) neither a nor b

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Definitions:

Termination Step

The final step in a chemical reaction sequence that produces stable products from reactive intermediates, thus concluding the reaction.

Free Radical Chlorination

A chemical reaction in which chlorine atoms are added to a molecule via free radical mechanisms, often used for the halogenation of alkanes.

ΔH°

The standard enthalpy change of a reaction, representing the heat absorbed or released under standard conditions.

ΔS°

The standard entropy change for a process, representing the change in entropy under standard conditions.