Crush AP Bio — One Interactive Tutorial at a Time
Learn AP Biology the interactive way — with videos, flashcards, and quizzes that make learning click
Your Step-by-Step AP Bio Journey
Build your understanding, confidence, and exam readiness — one topic at a time.
Unit 1: Molecules of Life
Note: For students who need additional chemistry background (atoms, molecules, structural formulas, chemical bonding) we have a series of Basic Chemistry tutorials.
- Properties of Water and Hydrogen Bonding
- Biochemistry Basics for AP Bio (monomers v. polymers, hydrolysis v. dehydration synthesis, functional groups.)
- Carbohydrates and Lipids
- Proteins
- Nucleic Acids
- Unit 1 Review Page
Unit 2: Cell Structure and Function
- Introduction to Cells: Basic Features, Prokaryotic v. Eukaryotic, etc.
- Cell Size and Surface Area to Volume Relationships
- Cellular Compartmentalization and Endosymbiosis
- Eukaryotic Cell Parts and Functions
- Cell Membrane Structure
- Membrane Transport
- Osmosis and Water Potential
- Unit 2 Review Page
Unit 3: Cellular Energetics
- Enzymes and Enzyme Regulation
- Cell Energy, Basic Concepts
- Cellular Respiration Overview
- Glycolysis, the Link Reaction, and the Krebs Cycle
- The Electron Transport Chain and Chemiosmosis
- Anaerobic Respiration
- Photosynthesis: The Big Picture
- Photosynthesis: The Light Reactions
- Photosynthesis: The Calvin Cycle
- Unit 3 Review Page
Unit 4: Cell Communication, Feedback and Homeostasis, the Cell Cycle
Unit 5: Heredity
- Meiosis: Key Concepts
- How Meiosis Creates Variation
- Meiosis, Step-by-Step
- Sex Determination
- Nondisjunction
- Mendelian Genetics: Key Concepts
- Dihybrid Crosses
- Linked Genes and Recombination
- How to do the χ2 test
- Sex Linked Genes
- Mitochondrial Inheritance, Incomplete Dominance, and Environment/Phenotype Interactions
- Unit 5 Review Page
Unit 6: Gene Expression
- DNA and RNA
- DNA Replication
- Transcription
- The Genetic Code and Protein Synthesis
- Operons/Bacterial Gene Regulation
- Eukaryotic Gene Regulation
- Mutations
- Horizontal Gene Transfer
- Biotechnology/Genetic Engineering
- Unit 6 Review Page
Unit 7: Evolution
- Natural, Artificial, and Sexual Selection
- Population Genetics
- Evidence for Evolution
- Species and Speciation
- Extinction
- Phylogeny
- Origin of Life
- Unit 7 Review Page
Unit 8: Ecology
This interactive AP Biology course is designed to support individual users (students who are not in a class on Learn-Biology.com through their teacher or professor). If you’re an AP Bio teacher or a college professor and you’re interested in using this course with your students, please let us know.
Why Students Love Learn-Biology.com

Built by Award-Winning Teachers
Created by expert AP Biology educators who know how to make biology make sense — and what it takes to score a 4 or a 5.

Makes Learning Easy and Fun
Interactive tutorials, quizzes, and games that help you truly understand biology — and remember it.

Proven Results
Used by thousands of students each year. Guaranteed 4 or 5 on the AP Bio exam.
Don’t Let Your Biology Course Leave You Behind
The material is complex, the pace is brutal, and the amount of vocabulary is ridiculous. It’s easy to feel discouraged.
Learn Biology in a Way That Leads to Better Grades and Test Scores

Learn by Doing
Interactive tutorials, quizzes, flashcards, and games that turn studying into active learning — giving you the practice you need to master AP Bio.

Built for AP Bio Success
100% aligned with the 2025 College Board AP Bio Framework. Designed by award-winning educators to help you succeed on the exam and in class.

Guaranteed Success
You’ll do better on tests and exams. You’ll see your grades improve — and you’ll finally feel like biology makes sense.
Your AP Bio Exam Success Plan
- Sign up.
- Use our AP Bio checklist to identify gaps in your knowledge and skills.
- Use our Flashcards, MCQs, FRQs, and Tap Challenge games to master what you need to know.
- Crush it on the AP bio exam.
“I taught biology for over 30 years — and AP Biology since 1999 — helping hundreds of students earn 4s and 5s on the AP exam. I’ve also trained high school teachers across the country in effective, research-based teaching strategies.
The interactive tutorials, quizzes, and diagrams on Learn-Biology.com are built on the same proven methods I used in my classroom to make biology clear, engaging, and successful. Now, through Learn-Biology.com, I’m continuing that mission — helping students everywhere master AP Bio and love learning biology.”
Glenn Wolkenfeld (Mr. W.)
• California NABT 2020 Outstanding Biology Teacher
• Berkeley Unified 2014 Teacher of the Year
All the AP Biology Learning Support You’ll Ever Need – Guaranteed
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