AP Biology: Unit 3: Cellular Energetics

Original, AI-authored English practice with worked guidance. Selected topics only; independent teacher review is pending. This is not a complete syllabus, official past-paper collection or predicted exam score. SubjectScout is not affiliated with or endorsed by College Board. SAT practice is not a full adaptive test; AP practice does not simulate an entire exam.

16 original questions across 8 selected topic areas. No account or payment required to practise.

2 questions in this topic. This is a limited practice preview and is not submitted for search indexing.

Official AP framework reference (framework only, not a source of copied questions).

Topic Practice view Difficulty Search questions

0 of 16 checked · 0 correct · 2 shown

Loading saved progress

Question 3 · Unit 3: Cellular Energetics · foundation

An enzyme is heated well above its normal working temperature. Its activity drops sharply. Which explanation best accounts for this decrease?A. The enzyme is used up as a reactant.B. The substrate must have become an enzyme.C. The enzyme's amino acid sequence necessarily reverses.D. Heat disrupts interactions maintaining the enzyme's functional shape.

Question 11 · Unit 3: Cellular Energetics · challenge

An inhibitor binds reversibly to an enzyme's active site and competes with its substrate. Under a simple competitive-inhibition model with fixed enzyme and inhibitor concentrations and otherwise unchanged conditions, which change can reduce the inhibitor's effect?A. Increase substrate concentration sufficiently.B. Remove every substrate molecule.C. Destroy the active site.D. Lower enzyme concentration to zero.

All Advanced Placement subjects