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
The final proof for DNA as the genetic material came from the experiments of:
1. Hershey and chase
2. Avery, McLeod and McCarty
3. Har Gobind Khorana
4. Griffith