Eating & Exercise"How many calories are in your favorite foods? How much exercise would you have to do to burn off these calories? What is the relationship between calories and weight? Explore these issues by choosing diet and exercise and keeping an eye on your weight."
Gene Expression - The Basics
"Express yourself through your genes! See if you can generate and collect three types of protein, then move on to explore the factors that affect protein synthesis in a cell."
Gene Machine: The Lac Operon
"Build a gene network! The lac operon is a set of genes which are responsible for the metabolism of lactose in some bacterial cells. Explore the effects of mutations within the lac operon by adding or removing genes from the DNA."
"Insert channels in a membrane and see what happens. See how different types of channels allow particles to move through the membrane."
Natural Selection
"Explore natural selection by controlling the environment and causing mutations in bunnies."
Neuron
"Stimulate a neuron and monitor what happens. Pause, rewind, and move forward in time in order to observe the ions as they move across the neuron membrane."
PhET Quick Links:
Teacher Resources
Biology Simulations
How to Run Simulations
Troubleshooting
Research
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