This narrated animation allows the learner to understand how six feet of DNA can be tightly packed to fit inside the nucleus of every human cell. [1:43]

Your cells contain an amazing factory that builds the RNA and protein machines that keep you alive. Learn how this factory works and what the relationship is between DNA, RNA, and proteins. [3:48]

Paul Andersen continues his description of DNA and RNA. He begins with the structure of DNA and RNA and moves into the process of DNA Replication. He also describes the central dogma of biology explaining how DNA is transcribed to mRNA...