Answer:
He identify DNA as a distinct molecule of the cell.
Step-by-step explanation:
In the year 1869, Friedrich Miescher separated "nuclein," DNA with associated proteins, from cell nuclei. He was the first scientist who identify DNA and considered as a distinct molecule present in the cell. He is well known for his incorrect tetranucleotide hypothesis of DNA. He formed the first photograph of the structure of DNA and also created the first accurate model of structure of DNA.