What is the difference between DNA and RNA?

The central dogma of biology hints that DNA is for long-term storage of information and RNA is for quickly making lots of copies of a gene when needed for expression. But what biochemical differences exist between DNA and RNA to make these roles happen?

How do we know DNA is the genetic material?

This video outlines three main experiments that contributed to the knowledge that DNA transfers information from one generation to the next, discovered years before the complete structure of DNA was even known. Learning some key pieces of genetics history is not only helpful for exams but also influences how we think about studying novel findings and appreciating scientific advances we take for granted today.