Experiment by Avery et. al.

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

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

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

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

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

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

Q.

What do you mean by transformants?

Q. In higher organisms, presence of repetitive DNA is for

1. genome arrangement
2. avoiding viable mutation
3. gene expression
4. just genetic load

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. 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

Q. Recall the experiments done by Frederick Griffith, Avery, $\text{MacLeod}$ and McCarty, where $DNA$ was speculated to be the genetic material. If $RNA,$ instead of $DNA,$ was the genetic material, would the heat killed strain of Pneumococcus have transformed the $R-\text{strain}$ into virulent strain? Explain.

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

1. RNA is the transforming principle
2. Protein is the transforming principle
3. Neither RNA nor protein could be the transforming principle
4. None of the above

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

1. RNA is the transforming principle
2. Protein is the transforming principle
3. Neither RNA nor protein could be the transforming principle
4. None of the above