Name four scientists and their contribution with reference to nucleic acids

1. Meishcer (1869) isolated nucleic acids and called them nuclein.

2. Hertwig (1884) suggested a heriditary role to the nuclein.

3. Kossel (19884) recognised purines and pyrimidines in the nucleic acids.

4. Watson and Crick (1953) demonstrated the double helix model for DNA molecule.