| List I | List II | ||
| A | Frederick Griffith | I | Genetic code |
| B | Francois Jacob & Jacque | II | Semi-conservative mode of DNA replication |
| C | Har Gobind Khoran | III | Transformation |
| D | Meselson & Stahl | IV | Lac operon |
If adenine constitutes 30% of the bases in a DNA molecule, what percentage of the bases is guanine?