AP®︎ Biology: Topic 3.2 Practice Test
Prepare for your quiz, test, or the AP exam with focused practice questions on Topic 3.2 of AP Biology – Environmental Impacts on Enzyme Function.
Questions List
Topic 3.2
Question 1 Easy
This question tests the following: ENE-1.E.1
What do enzymes do to the activation energy of a reaction?
What You’re Being Tested On:
Explore the learning objectives taken directly from the College Board’s AP® Biology Curriculum. Ensure you’re prepared for the exact topics covered on the AP® exam, in-class tests, and quizzes, and gain confidence in your mastery of the material.
Topic 3.2: Environmental Impacts on Enzyme Function
Learning Objective: 3.2.A
Explain how changes to the structure of an enzyme may affect its function.
Essential Knowledge: 3.2.A.1
Change to the molecular structure of a component in an enzymatic system may result in a change to its function or efficiency. i. Denaturation of proteins, such as enzymes, occurs when the protein structure is disrupted by a change in temperature, pH, or chemical environment, eliminating the ability to catalyze reactions. ii. Environmental temperatures and pH outside the optimal range for a given enzyme will cause changes to its structure (by disrupting the hydrogen bonds), altering the efficiency with which it catalyzes reactions.
Essential Knowledge: 3.2.A.2
In some cases, enzyme denaturation is reversible, allowing the enzyme to regain activity.
Learning Objective: 3.2.B
Explain how the cellular environment affects enzyme activity.
Essential Knowledge: 3.2.B.1
The relative concentrations of substrates and products determine how efficiently an enzymatic reaction proceeds.
Essential Knowledge: 3.2.B.2
Higher environmental temperatures increase the average speed of movement of molecules in a solution, increasing the frequency of collisions between enzymes and substrates and therefore increasing the rate of reaction until the optimal temperature is achieved.
Essential Knowledge: 3.2.B.3
Competitive inhibitor molecules can bind reversibly to the active site of the enzyme. Noncompetitive inhibitors can bind to allosteric sites, changing the activity of the enzyme.
