(a) Describe the series of experiments of F. Griffith. Comment on the significance of the results obtained.
(b) State the contribution of Macleod, McCarty and Avery.

(a) Explain with the help of Griffith's experiment how the seach for genetic material was conducted and what was the conclusion drawn ? (b) How did Macleod,Mc Carty and Avery establish the Bio-Chemical nature of the so called "genetic material" identified by Griffith in his experiment.

(a) Describe the various steps of Griffith's experiment that led to the conclusion of the 'Transforming Principle'. (b) How did the chemical nature of the 'Transforming Principle' get established ?

(a) Describe the various steps of Griffith's experiment that led to the conclusion of the 'Transforming Principle'. (b) How did the chemical nature of the 'Transforming Principle' get established ?

(a) Describe the various steps of Griffith's experiment that led to the conclusion of the 'Transforming Principle'. (b) How did the chemical nature of the 'Transforming Principle' get established ?

(a) Describe the various steps of Griffith's experiment that led to the conclusion of the 'Transforming Principle'. (b) How did the chemical nature of the 'Transforming Principle' get established?

(a) Describe the various steps of Griffith's experiment that led to the conclusion of the 'Transforming Principle'. (b) How did the chemical nature of the 'Transforming Principle' get established ?

Describe Avery, McLeod and McCarty's experiment. State its significance.

Describe the experiment of Avery, MacLeod and McCarty to determine the biochemical nature of genetic material.

Explain Rutherford’s experiment on the scattering of alpha particles from a gold foil and state the significance of the results.