Biology

Enzyme Activity

Enzymes are proteins that act as biological catalysts: they speed up chemical reactions in living things without being used up. Each enzyme works on one kind of molecule, called its substrate, which fits into a special shape on the enzyme called the active site.

1. Watch the lock and key model work.
2. Find the substrate that fits the active site.
3. Explore how temperature changes enzyme activity.
4. Find the best pH for three different enzymes.
5. Take a five-question quiz.