Give an account of Hershey and Chase experiment. What did it conclusively prove? If both DNA and proteins contained phosphorusand sulphur do you think the result would have been the same?

Which element do you think would have been named by Seaborg's group?

You are repeating the Hershey-Chase experiment and are provided with two isotopes: 32P and 15N (in place of 35S in the original experiment). How do you expect your results to be different?

The number of students of Std. 6 and Std. 7 who went to visit the Tadoba Tiger Project at Chandrapur was 140 and 196 respectively. The students of each class are to be divided Into groups of the same number of student. Each group can have a paid guide. What is the maximum number of students there can be in each group ? Why do you think each group should have the maximum possible number of students ?

Which element do you think would have been named by Lawrence Berkeley Laboratory

Explain how did A. D. Hershey and M. J. Chase differentiate DNA and proteins in their experiment while proving that DNA is the genetic meterial?

Answer the following : When big grain storage container is required to slide on the ground , it becomes easier if two persons push it rather than one person . When the force is applied by both in the same direction , the movement is easy . You may have experienced this . what do we understand from this example ?

Rub one end of a glass rod against a silk cloth. Due to the rubbing a small charge will get transferred from one object to the other. As a result both the objects will become somewhat charged. Suspend this rod freely in air with the help of a thread. Now charge another glass rod in the same manner and bring it near the suspended tod. What do you see?

In Rutherford's experiment, generally the thin foil of heqavy atoms, like gold, platinum etc, have been used to be bombared by the alpha - particles. If the thin foil of light atoms like aluminium etc. is used, what difference would be observed from the above results?

Do you think Mendel's laws of inheritance would have been different if the characters that he chose were located on the same chromosome.