Breakthroughs Contrary to popular belief, there are 21 amino acids and the 21st was discovered in 1976 You might have been told that there are 20 amino acids. That’s a lie.
DNA The Lac Operon: Everyone's heard of it, but do you know how it was discovered? 'If gene expression determines the function of a cell, it must be important to control that process?' Yes, very! Let me tell you about the PaJaMo experiment.
DNA Nettie Stevens, a former school teacher turned geneticist, discovered sex chromosomes in 1905. Here's her story: Nettie Stevens’ contributions to the field of genetics were groundbreaking.
DNA Deoxyribonucleic acid (DNA) is the genetic material, but early on, most of science thought the genetic material was protein —that changed in 1952 Deoxyribonucleic acid (DNA) is the genetic material, but early on, most of science thought the genetic material was protein. That changed in 1952.
DNA The "most beautiful experiment in biology" was performed by Meselson and Stahl in 1957 Watson and Crick solved the structure of DNA and everyone lived happily ever after, right? Wrong. That was just the opening argument.
DNA Florence Bell and William Astbury's x-ray diffraction work on a 'pile of pennies' The first crystal structure of DNA was published in 1938. It was generated by Florence Bell, a scientist you need to know.