The dawn of the realization that biology was about information storage coincided with the dawn of information-based computers. In 1943, Erwin Schrödinger was the first scientist to

suggest genes contain a code, just as a computer program is based on numerical code. Still

so few scientists believed DNA was the molecule encoding for hereditary information. Why?

Scientists believed DNA was the molecule encoding for hereditary information due to the presence of makeup material inside in it.

Explanation:

The Hershey–Chase experiments which was conducted in 1952 indicate that DNA contains genetic material which has all the information about the makeup of living organism. DNA molecule has all information of making proteins and produces proteins which are necessary for the normal functioning of body of living organism. DNA molecule is just like a recipe book which contains all information of making protein.