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This four-part animation series explores the biology of the virus SARS-CoV-2, which has caused a global pandemic of the disease COVID-19.

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 animation describes how skin color is generated by skin cells as protection against ultraviolet (UV) radiation.

This film tells the story of the scientists and the evidence involved in one of the most important scientific quests of the 20th century: the discovery of the structure of DNA.

This animation shows how a variety of proteins interact to regulate the transcription of eukaryotic DNA into RNA.

This animation shows how dengue virus infects a cell and replicates itself with the help of its host’s cellular machinery.

This animation explores the chemical components and bonds of the nucleotides that make up DNA.

This animation describes PCR, a standard laboratory technique for making many copies of a specific DNA sequence.

This animation shows how HIV infects a cell and replicates itself using reverse transcriptase.

This animation shows how a medication called AZT, which is a reverse transcriptase inhibitor, can be used to treat HIV/AIDS.

This animation describes the typical ratios of bases in DNA.

This animation describes how only a small part of the human genome directly codes for proteins.