This animation shows how the proton gradient across the mitochondrial membrane powers the ATP synthase enzyme to make ATP. It is the third of three animations about cellular respiration.
This animation shows how the enzyme complexes of the electron transport chain harvest energy from cofactor molecules to pump protons across the mitochondrial membrane and establish a chemical gradient. It is the second of three animations about cellular respiration.
This animation shows the reactions of the citric acid cycle, which splits off carbon atoms and generates energy-rich reduced forms of cofactor molecules. It is the first of three animations about cellular respiration.
In this activity, students find a scientist with whom they can relate in some way and then explore and reflect upon the impact of that scientist’s work.
In this activity, students build a paper model of DNA and use their model to explore key structural features of the DNA double helix. This activity can be used to complement the short film The Double Helix.
This interactive module allows students and educators to build models that explain how the Earth system works. The Click & Learn can be used to show how Earth is affected by human activities and natural phenomena.
This animation shows how mutations in an ion channel protein lead to the genetic disease cystic fibrosis. The animation also discusses how research on this protein has been used to develop treatments for the disease.
This tutorial describes the structure and function of the cancer-causing protein BCR-ABL. It also shows how drugs targeting this protein can help treat chronic myeloid leukemia (CML), a cancer of the white blood cells.
This activity explores conservation biology topics presented in the short film The Guide: A Biologist in Gorongosa. This film tells the story of Tonga Torcida, a young man who discovers his passion for science in the newly revitalized Gorongosa National Park in Mozambique.
This film is set in war-torn Gorongosa National Park in Mozambique, a protected area that has been the subject of a large-scale restoration project. The film tells the story of a young man from the local community who discovers a passion for science after meeting world-renowned biologist E.O.