NEET BIOLOGY

Detailed explanation-1: -Miescher recognised that he had discovered a novel molecule. Since he had isolated it from the cells’ nuclei he named it nuclein, a name preserved in today’s designation deoxyribonucleic acid.

Detailed explanation-2: -One hundred fifty years ago, Friedrich Miescher discovered DNA when he isolated “Nuclein"-as he named it-from nuclei of human pus cells. Miescher recognized his isolate as a new type of molecule equal in importance to proteins.

Detailed explanation-3: -Miescher, a Swiss scientist, wanted to study the chemistry of cells. He chose to study white blood cells, which are abundant in pus, and were abundantly available to him in bandages from a hospital near his university. Miescher isolated a material rich in phosphorus from the cells and called it nuclein.

Detailed explanation-4: -In 1869, while working under Ernst Hoppe-Seyler at the University of Tübingen, Miescher discovered a substance containing both phosphorus and nitrogen in the nuclei of white blood cells found in pus.

Detailed explanation-5: -The First Piece of the Puzzle: Miescher Discovers DNA Although few people realize it, 1869 was a landmark year in genetic research, because it was the year in which Swiss physiological chemist Friedrich Miescher first identified what he called “nuclein” inside the nuclei of human white blood cells.