Scientist of DNA

By lynndon2019

  • Miescher

    Miescher
    Miescher discovered that DNA, along with proteins, are important molecules of the cell nucleus. Miescher made his discovery by removing the pus from band aids and observing the proteins in the nuclein of leucocytes cells. This discovery was added to the previous idea of DNA because, previous to his experiment, there was no true information that had been collected about DNA and its functions.

  • Chargaff

    Chargaff
    Chargaff discovered that DNA varies from species to species. Also he created the "1:1 ratio" which described how the percentage of nitrogenous bases is organized. The discovery was made by him preparing the DNA while his partners analysed its components using ultraviolet spectrophometry. His discovery helped represent how parts of DNA were organized and paired.

  • Franklin

    Franklin
    Franklin demonstrated that DNA can exist in two forms, depending on the humidity of the surrounding air. She made her discovery by observing DNA using x-ray diffractions of wet and dry DNA. Originally, Franklin was the one who was crediting with discovering the "double helix" shape that is currently used to describe the shape of DNA.

  • Hershey and Chase

    Hershey and Chase
    Hershey and Chase concluded that DNA is the carrier of the genetic information. They came to this conclusion by studying the phage virus. While they were studying the virus, they discovered that the DNA, not the proteins, of this virus contained the phage genes. Their discovery laid out the basic premise for the function of DNA.

  • Watson and Crick

    Watson and Crick
    Watson and Crick suggested that that the DNA molecule was composed of two chains of nucleotides. Also, they concluded that one side of nucleotides was facing up while the other was facing down. Their discovery was made by building on Chargaff's findings. Watson and Crick created the idea that DNA was a "double helix" shape.

  • Meselson and Stahl

    Meselson and Stahl
    Meselson and Stahl proved that the model of DNA replications was correct. They came to this conclusion by conducting an experiment on bacteria in different mediums. This discovery further establish the idea of DNA replication.