Question

Which scientist isolated 'nuclein' from white blood cells in pus in 1869, later identified as DNA?

Options

• James Watson

• Friedrich Miescher

• Erwin Chargaff

• Rosalind Franklin

Answer 1

Friedrich Miescher conducted the first isolation of 'nuclein' from white blood cells (pus) in 1869. This was a landmark discovery that led to the eventual identification of this molecule as deoxyribonucleic acid (DNA). Chargaff discovered base equivalence rules later, while Franklin and Watson contributed to understanding its structure.