Experiment of Griffith

In the history of Genetics, Two Scientist have reveled information to society about the DNA, One was Mendel and Second One was the Griffith. In this video Lecture Griffith's Contribution in discovery of DNA is Discussed.
1.What was conclusion of Experiment?
2.Why Capsule is lethal to Mice?
3.What is responsible for capsule formation?
4.Who have proved DNA as genetic Material?

Link to Video: 
Semester: 
5
Unit: 
1
Subject: 
MICROBIOLOGY
Paper: 
1