The correct option is A All the body cells of an individual seem to have identical amounts and compositions of DNA, while reproductive cells have half the amount of DNA found in body cells.
It has also been experimentally proved by Avery et al. that the transforming agent in the case of Diplococcus pneumoniae bacterium is DNA.
Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of living things. All known cellular life and many viruses contain DNA. The main role of DNA in the cell is the long-term storage of information.