Khan Academy
Khan Academy: Biology: Macromolecules: Nucleic Acids
An article investigating the structure of DNA and RNA.
Khan Academy
Khan Academy: Biology: Macromolecules: Orders of Protein Structure
An article that investigates the levels of protein structure. Understand how the order of the protein structure affects its function.
Khan Academy
Khan Academy: Biology: Energy and Enzymes: Overview of Metabolism
An article reviewing how energy flows in a cell including metabolic pathways.
Khan Academy
Khan Academy: Biology: Enzymes and Energy: Types of Energy
An article that reviews over the different types of energy: kinetic, potential, and chemical.
Khan Academy
Khan Academy: Biology: Energy and Enzymes: The Laws of Thermodynamics
Explore the first and second law of thermodynamics as it applies to the body in this article.
Khan Academy
Khan Academy: Biology: Energy and Enzymes: Free Energy
In this article, read all about the relationship between spontaneity and equilibrium to the Gibb's free energy change.
Khan Academy
Khan Academy: Biology: Energy and Enzymes: Atp and Reaction Coupling
Investigate ATP structure, ATP hydrolysis to ADP, and reaction coupling in this article.
Khan Academy
Khan Academy: Energy and Enzymes: Activation Energy
An information page about activation energy. Learn about activation energy, transition states, and reaction rates.
Khan Academy
Khan Academy: Enzymes and the Active Site
An article reviewing over enzymes and active sites.
Khan Academy
Khan Academy: Energy and Enzymes: Enzyme Regulation
Review over the factors that can control enzymatic activity with this article.
Khan Academy
Khan Academy: Basics of Enzyme Kinetics Graphs
Learn about the basics of enzyme kinetics graphs, and see examples of the graphs to understand the valuable data that is found on the graph. [12 min, 29 sec]
Khan Academy
Khan Academy: Biology: Structure of a Cell: Introduction to Cells
Learn about cell theory in this article. [12:29]
Khan Academy
Khan Academy: Biology: Structure of a Cell:prokaryotic Cells
Review over characteristcs of cella specifically prokaryotic cells in this article.
Khan Academy
Khan Academy: Biology: Structure of a Cell: Introduction to Eukaryotic Cells
An article reviewing the structure of eukaryotic cells. Learn how the cells have a nucleus, organelles, and chromosomes.
Khan Academy
Khan Academy: Plasma Membrane and Cytoplasm
Article takes an in-depth look at the structure and function of the plasma membrane and cytoplasm of cells, the phospholipid bilayer, and microvilli.
Khan Academy
Khan Academy: Nucleus and Ribosomes
Discussion in detail of the structure and function of the nucleus and ribosomes of a cell and how they work together in the production of proteins.
Khan Academy
Khan Academy: The Endomembrane System
Article looks at the structure and function of the different parts of the endomembrane system, how proteins, lipids, and vesicles are transported between these parts, and how this activity keeps the cell running smoothly.
Khan Academy
Khan Academy: Mitochondria and Chloroplasts
Resource takes a look at the structure and function of the organelles mitochondria and chloroplasts. It also examines endosymbiosis, where the organelles probably came from.
Khan Academy
Khan Academy: The Cytoskeleton
There are three types of protein fibers in the cytoskeleton: microfilaments, intermediate filaments, and microtubules. This resource examines each type of filament, as well as some specialized structures: flagella, cilia, and centrosomes.
Khan Academy
Khan Academy: The Extracellular Matrix and Cell Wall
Article examines the external structures of the extracellular matrix and the cell wall and looks at the role they play in different cell types.
Khan Academy
Khan Academy: Cell Cell Junctions
Learn about the different types of intercellular junctions, including plasmodesmata, tight junctions, gap junctions, and desmosomes.
Khan Academy
Khan Academy: Structure of the Plasma Membrane
Article takes a look at the different components (protein, lipid, cholesterol, and carbohydrate) of the plasma membrane, examining their roles, their diversity, and how they work together to make a secure boundary around the cell.
Khan Academy
Khan Academy: Osmosis and Tonicity
Provides an overview of osmosis and tonicity and looks at how osmosis works, as well as the role it plays in the water balance of cells. Describes hypertonic, isotonic, and hypotonic solutions and their effect on cells.
Khan Academy
Khan Academy: Diffusion and Passive Transport
Learn about membrane permeability and facilitated diffusion (including channels and carrier proteins).