Free AP exam practice

Practice questions for AP exams

200 scenario-based questions per subject, organized by unit and written at College Board difficulty. Study smarter, not longer.

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AP Bio Unit 4 · Cell Communication
Which type of receptor is most likely used by a lipid-soluble signaling molecule?
A G protein-coupled receptor
B Ligand-gated ion channel
C Intracellular receptor
D Receptor tyrosine kinase
✓ Lipid-soluble molecules diffuse through the membrane and bind intracellular receptors directly.
Subjects

Seven exams, 1,400 questions

Every subject is organized by unit so you can focus on exactly what's being tested.

🧬
AP Biology
📐
AP Calculus AB
∫
AP Calculus BC
⚗️
AP Chemistry
🌿
AP Environmental Science
📊
AP Statistics
🗽
AP US History
How it works

Built for how AP exams are actually structured

01
Pick your subject and unit
Every AP subject is broken into the same units the College Board uses, so you always know what you're studying and why.
02
Answer multiple-choice questions
Questions are written to match the style and difficulty of the real exam - not too easy, not obscure. Just solid practice.
03
Read the explanation
Every question has a clear explanation of why the correct answer is right - so you learn the reasoning, not just the answer.

About APFlash

APFlash covers the reasoning skills AP exams actually test - interpreting data, applying concepts to new scenarios, and thinking across units. Every question is written at College Board difficulty, organized by official unit, and tracked so you know exactly where to focus.

Frequently Asked Questions

What is APFlash?

APFlash is a free AP exam practice tool with 200 scenario-based multiple-choice questions per subject, covering AP Biology, AP Chemistry, AP Calculus AB, AP Calculus BC, AP Environmental Science, AP Statistics, and AP US History. No account required.

Is APFlash free?

Yes, completely free. No signup, no subscription, no ads.

Which AP subjects does APFlash cover?

APFlash currently offers 200 practice questions each for AP Biology, AP Calculus AB, AP Calculus BC, AP Chemistry, AP Environmental Science, AP Statistics, and AP US History. Additional subjects are in development.

How are APFlash questions different from other AP practice tools?

APFlash questions are scenario-based and written at College Board difficulty. They test the same reasoning skills as the real exam - interpreting data, applying concepts to new situations, and thinking across units - not just vocabulary recall.

Does APFlash track my progress?

Yes. APFlash tracks your score and performance by unit within each subject. Your progress is saved automatically in your browser - no account needed.