List I | List II | ||
A. | Frederick Griffith | I. | Genetic code |
B. | Francois Jacob & Jacque Monod | II. | Semi-conservative mode of DNA replication |
C. | Har Gobind Khorana | III. | Transformation |
D. | Meselson Stahl | IV. | Lac operon |
List-I | List-II | ||
1. | DNA fingerprinting | I. | M. Meselson and F. Stahl |
2. | Pneumococcus | II. | A Harshey and M. Chase |
3. | E.coli | III. | F. Griffith |
4. | Bacteriophage | IV. | Alec Jeffreys |
1. | A-IV, B-III, C-II, D-I | 2. | A-IV, B-III, C-I, D-II |
3. | A-II, B-III, C-I, D-IV | 4. | A-III, B-II, C-I, D-IV |
A: | Viruses grown in the presence of radioactive phosphorus contained radioactive DNA. |
B: | Viruses grown on radioactive sulphur contained radioactive proteins. |
C: | Viruses grown on radioactive phosphorus contained radioactive protein |
D: | Viruses grown on radioactive sulphur contained radioactive DNA |
E: | Viruses grown on radioactive protein contained radioactive DNA |
1. | (D) and (E) only | 2. | (A) and (B) only |
3. | (A) and (C) only | 4. | (B) and (D) only |
Which one of the following experiments of Frederick Griffith resulted in the discovery of bacterial transformation?
1. | S-stain(heat-killed) → injected in to Mice → Mice lived |
2. | S-strain (heat killed) + R-strain(live) → injected in to Mice → Mice died |
3. | S-stain → injected in to Mice → Mice died |
4. | R-strain → injected in to Mice → Mice lived |
1. | No radioactive sulfur in bacterial cells |
2. | Both radioactive sulfur and phosphorus in bacterial cells |
3. | Radioactive sulfur in bacterial cells |
4. | Radioactive phosphorus in bacterial cells |
Which scientist experimentally proved that DNA is the sole genetic material in bacteriophage?
1. Beadle and Tatum
2. Messelson and Stahl
3. Hershey and Chase
4. Jacob and Monod