During the course of evolution why DNA was chosen over RNA as genetic material? Givereasons by first discussing thedesired criteriain a molecule that can act as genetic material and in the light of biochemical differences between DNA andRNA.

Define transformation in Griffith's experiment. Discuss how it helps in the identification of Dna as the genetic material.

Mitochondria and plastids have their own DNA (genetic material). What is known about their fate during nuclear division like mitosis?

Why is DNA molecule more stable genetic meterial than RNA? OR DNA is more stable than RNA. Justify/Give reason.

Recall the experiments done by Frederick Griffith, Avery, 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- strain into virulent strain? Explain