AP Biology

Meselson-Stahl DNA Replication

Replicate the most beautiful experiment in biology. Centrifuge radioactive nitrogen isotopes (15N vs 14N) across bacterial generations to generate heavy, hybrid, and light DNA bands proving semi-conservative replication.

Neuron Action Potential Simulator

Trigger an electrical stimulus on a neuron and watch the membrane potential graph trace typical Depolarization, Repolarization, and Hyperpolarization phases. Track the live states of Na+ and K+ ion channels.

ATP Synthesis & Chemiosmosis

Cell Membrane Transport

Cellular Respiration Explorer

Cladogram & Phylogenetic Tree

DNA Replication Fork

ELISA Assay Simulator

Enzyme Kinetics

Gel Electrophoresis

Hardy-Weinberg Equilibrium

Action of Hormones