AP Biology

Learn about the chemistry of life in unit 1 of the AP Biology course. We'll cover topics such as the structure of water, hydrogen bonding, elements of life, biological macromolecules, and nucleic acids. Prepare for the exam with these resources and you be on your way to crush the AP Bio exam!

Unit 1 – Chemistry of Life

1.5 Structure and Function of Biological Macromolecules

1.3 Introduction to Biological Macromolecules

Unit 1 Overview: Chemistry of Life

1.4 Properties of Biological Macromolecules

1.6 Nucleic Acids

1.1 Structure of Water and Hydrogen Bonding

1.2 Elements of Life

Unit 2 of AP Biology covers cell structure and function. We'll go over key topics such as subcellular components, cell size, plasma membranes, membrane permeability, membrane transport, facilitated diffusion, tonicity, osmoregulation, and cell compartmentalization. 

Unit 2 – Cell Structure & Function

2.4 Plasma Membranes

2.3 Cell Size

2.6 Membrane Transport

2.10 Cell Compartmentalization

2.2 Cell Structure and Function

2.5 Membrane Permeability

2.8 Tonicity and Osmoregulation

2.11 Origins of Cell Compartmentalization

2.7 Facilitated Diffusion

2.1 Cell Structure: Subcellular Components

2.9 Mechanisms of Transport

Unit 2 Overview: Cell Structure and Function

Unit 3 of AP Biology is all about cellular energetics. Review topics such as enzyme structure, enzyme catalysis, environmental impacts on enzyme function, cellular energy, and photosynthesis. 

Unit 3 – Cellular Energetics

Unit 3 Overview: Cellular Energetics

3.1 Enzyme Structure

3.5 Photosynthesis

3.6 Cellular Respiration

3.2 Enzyme Catalysis

3.7 Fitness

3.3 Environmental Impacts on Enzyme Function

3.4 Cellular Energy

Learn about how cells communicate and reproduce in unit 4 of AP Biology. Our study guides for unit 4 cover cell communication, signal transduction, changes in signal transduction pathways, feedback, cell cycle basics, and regulation of the cell cycle. 

Unit 4 – Cell Communication & Cell Cycle

4.6 Cell Cycle

4.3 Signal Transduction

4.5 Homeostasis & Feedback Loops

4.2 Introduction to Signal Transduction

4.1 Cell Communication

4.4 Changes in Signal Transduction Pathways

4.7 Regulation of Cell Cycle

Unit 4 Overview: Cell Communication and Cell Cycle

Get a solid understanding of heredity in unit 5 of the AP Biology exam. We'll cover topics such as meiosis, genetic diversity, mendelian genetics, non-mendelian genetics, environmental effects on phenotype, and chromosomal inheritance. 

Unit 5 – Heredity

5.4 Non-Mendelian Genetics

5.6 Chromosomal Inheritance

5.3 Mendelian Genetics

5.1 Meiosis

Unit 5 Overview: Heredity

5.2 Meiosis and Genetic Diversity

5.5 Environmental Effects on Phenotype

Join us in exploring gene expression and regulation for the AP Biology exam. We'll cover all the topics in unit 6, such as DNA and RNA structure, replication, transcription, RNA processing, translation, regulation of gene representation, cell specialization, mutations, and biotechnology. 

Unit 6 – Gene Expression & Regulation

6.5 Regulation of Gene Expression

6.4 Translation

6.7 Mutations

6.6 Gene Expression and Cell Specialization

6.1 DNA and RNA Structure 

6.8 Biotechnology

Unit 6 Overview: Gene Expression and Regulation

6.2 Replication

6.3 Transcription and RNA Processing

Understanding natural selection is crucial to learning about how ecosystems function. Learn about unit 7 of AP Biology as we cover topics such as artificial selection, population genetics, hardy-weinberg equilibrium, evidence of evolution, common ancestry, continuing evolution, phylogeny, speciation, extinction, and origin of life on earth. 

Unit 7 – Natural Selection

7.11 Extinction

7.5 Hardy-Weinberg Equilibrium

7.10 Speciation

7.7 Common Ancestry

7.2 Natural Selection

7.6 Evidence of Evolution

7.4 Population Genetics

7.3 Artificial Selection

7.9 Phylogeny

7.13 Origin of Life on Earth

7.1 Introduction to Natural Selection

7.12 Variations in Population

7.8 Continuing Evolution

Unit 7 Overview: Natural Selection

Ecology is all about the interactions that organisms have amongst themselves and with their environment. In unit 8 of AP Biology, we'll cover topics such as responses to the environment, energy flow, population ecology, the effect of density of populations, community ecology, etc. 

Unit 8 – Ecology

8.2 Energy Flow Through Ecosystems

8.5 Community Ecology

8.3 Population Ecology

8.4 Effect of Density of Populations

8.7 Disruptions to Ecosystems

Unit 8 Overview: Ecology

8.1 Responses to the Environment

8.6 Biodiversity

Frequently Asked Questions

What Are the 5 Best Resources for AP Biology?

7 Tips From an A+ AP Biology Student

The Fluid Mosaic Model

Must Know About AP Biology Labs

Exam Reviews 2020

2019 Reviews

Previous Exam Prep

Enzyme Catalysis

Cellular Structure & Transport

Review of Unit 2

Community Ecology

Enzyme Structure

Exam Review

DNA Replication, Transcription, and Translation

Macroevolution

Mitosis & Meiosis

Endocrine System

Review Part V: Ecology

Plasma Membranes

Mendelian and Non-Mendelian Genetics and Chi Square

Body Systems

Cell Structure: Subcellular Components

Hardy-Weinberg

Chemistry Review for Biology Students

Photosynthesis

Review Part II: Cells & Energy Transfer

Gene Expression, Cell Specialization, and Mutations

Nervous System

Membrane Transport

Introduction to Biological Macromolecules

Review Part III: Cell Division & DNA to Protein

Gene Regulation

Elements of Life

Cell Signaling

Biotechnology

🎉NMSI AP Reader Chat: Biology

Mechanisms of Transport

Cell Structure and Function

Extinction, Variation in Populations, and the Origins of Life

Gene to Protein

Immune System

Nutrient Cycles & Succession

Chi Square Analysis

Abiotic Signaling

Cellular Energy

Presentation Slides, Cellular Energy

Review of Unit 1 Part 2

AP Biology Unit 1

Membrane Permeability

Structure of Water and Hydrogen Bonding

🌶 Big Ideas 1-2 Review

Microevolution and Hardy Weinberg

Bacteria & Viruses

Back to Basics: Cells

Tonicity and Osmoregulation

AP Biology Unit 1 Review - Chemistry of Life

Cell Signaling - Slides

Chemistry Review for Biology Students - Slides

Cellular Respiration

🌶 Last Minute AP Bio Tips & Tricks

Nucleic Acids

Intro to AP Biology

Q and A

Overview of the AP Biology Exam with an Example FRQ for Unit 1

Meiosis and an Intro to Heredity

Mendelian Genetics

Cell Size

Review of Unit 3

Photosynthesis - Slides

Intro to Unit 1 for Teachers

Properties of Biological Macromolecules

Cellular Respiration - Slides

Dialysis Tubing Lab Review

Structure and Function of Biological Macromolecules

Population Ecology

🌶 Big Ideas 3-4 Review

Facilitated Diffusion

Origins of Life

Microevolution & Natural Selection

Biochemistry Review - Unit 1 Biology

Review Part IV: Heredity & Body Systems

Environmental Impacts on Enzyme Function

DNA Replication

Review of Unit 1 Part 2 - Slides

Cram Review (2019)

Cell Compartmentalization and Its Origin

Transformation Lab

Feedback Mechanisms and the Cell Cycle

Cellular Structure & Transport - Slides

Cell Communication

Non-Mendelian Genetics & Pedigrees

Review Part I: Evolution

Study Tools

Download the 2024 AP Biology Cheatsheet PDF

2024 AP Biology Exam Guide

Exam Skills

2016 FRQ Review

2019 FRQ Review

Note Taking and Study Strategies

Note Taking and Study Strategies - Slides

2019 Exam Review - Version O FRQ

Long Free Response: Labs & Data

2018 FRQ Review

2017 FRQ Review

How to FRQ

2015 FRQ Review

Score Higher on AP Biology 2024: MCQ Tips from Students

Score Higher on AP Biology 2024: Tips for FRQ 1 - Interpreting and Evaluation Experimental Results

Score Higher on AP Biology 2024: Tips for FRQ 2 – Interpreting and Evaluating Experimental Results with Graphing

Score Higher on AP Biology 2024: Tips for FRQ 3 – Scientific Investigation

AP Biology Practice Questions (MCQ): 🦍 Unit 7 – Natural Selection: 7.12 Variations in Population

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