Experiment by Avery et. al.

Q. Avery, MacLeod and McCarty observed that in the experimental tubes to which RNAse and proteinase were added, the transformation could happen. This indicated that:

1. Either RNA or protein could be the genetic material
2. RNA is the transforming principle
3. Protein is the transforming principle
4. Neither RNA nor protein could be the genetic material

Q. Among the following, identify the correct option that does not show transformation of R strain into S strain?

1. S strain (heat killed) + R strain (live)
2. S strain (heat killed) + R strain (live) + Protease
3. S strain (heat killed) + R strain (live) + RNase
4. S strain (heat killed) + R strain (live) + DNase

Q. Which one of the following suggested that DNA causes the transformation of R strain into S strain?

1. Biochemicals of heat-killed S strain + R strain ----(DNAse) --------> Live S strain
2. Biochemicals of heat-killed S strain + R strain -----(RNAse) --------> R strain
3. Biochemicals of heat-killed S strain + R strain -----(Proteinase) -------> Live S strain
4. Biochemicals of heat-killed S strain + R strain -----(DNAse) -------> R strain

Q. The first concluding proof that DNA is the hereditary material was given by

1. Avery, MacLeod and McCarty
2. Hershey and Chase
3. Griffith
4. Watson and Crick