AP Biology Flashcards: Environmental Impacts on Enzyme Function
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Review key ideas with interactive flashcards. This set includes 14 cards to help you master important concepts.
How does the cellular environment influence enzyme activity?
The cellular environment, through factors like temperature, pH, and concentrations of molecules, directly affects enzyme structure and function.
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How does the cellular environment influence enzyme activity?
The cellular environment, through factors like temperature, pH, and concentrations of molecules, directly affects enzyme structure and function.
In a reversible reaction, the concentration of the product is significantly increased. How might this impact the efficiency of the forward reaction?
Increasing the product concentration would decrease the efficiency of the forward reaction, as efficiency depends on the relative concentrations of substrates and products.
How do changes to an enzyme's structure affect its function?
Structural changes to an enzyme, such as denaturation, can disrupt its function and catalytic ability.
Where do competitive and noncompetitive inhibitors bind on an enzyme?
Competitive inhibitors bind to the active site, while noncompetitive inhibitors bind to allosteric sites.
What two environmental factors can cause an enzyme to denature?
Non-optimal temperature and non-optimal pH are two environmental factors that can cause an enzyme to denature.
Is enzyme denaturation always permanent?
No, in some cases, enzyme denaturation is reversible, allowing the enzyme to regain activity once optimal conditions are restored.
Why does a moderate increase in temperature speed up an enzymatic reaction?
A moderate temperature increase causes molecules to move faster, resulting in more frequent collisions between the enzyme and its substrate.
What is enzyme denaturation?
Denaturation is a structural change to an enzyme caused by non-optimal conditions like temperature or pH, which disrupts its function.
Noncompetitive Inhibitor
A noncompetitive inhibitor is a molecule that binds to an allosteric site on an enzyme, which changes the enzyme's shape and activity.
What determines the efficiency of an enzymatic reaction?
The efficiency of an enzymatic reaction is determined by the relative concentrations of its substrates and products.
An enzyme is moved from its optimal pH of 7 to a highly acidic environment (pH 2). What is the likely effect on its function?
The enzyme will likely denature due to the non-optimal pH, which will disrupt its catalytic ability and function.
Competitive Inhibitor
A competitive inhibitor is a molecule that binds reversibly to the active site of an enzyme, preventing the substrate from binding.
How do higher environmental temperatures affect the rate of an enzymatic reaction?
Up to an optimal point, higher temperatures increase molecular movement, leading to more frequent enzyme-substrate collisions and a faster reaction rate.
A new drug is developed that binds to an enzyme at a location other than its active site, reducing its activity. What type of inhibitor is this drug?
This drug is a noncompetitive inhibitor because it binds to an allosteric site, not the active site, to change the enzyme's activity.