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nrect Question 5 0/1 pts The concept of a hertiable molecule (that we now know is DNA) between cells began in the 80s when we could copy DNA had long been theorized before it could be demonstrated occurred in the 1920s occurred in the 1940s 1/1 pts Question 6
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The correct option is third one. The fact that a heritable molecule is present has been known since long . It was named a variety of things and nobody was sure of the structure also in the beginning.

Miescher while working on white blood cells in the 1860s found a substance on adding acid to the cells and he called it nuclein but he wasn’t exactly sure about it properties . After that the nucleic acids were discovered in 1880s by Kessel. Mendel also proposed his theory of inheritance after his extensive work on the pea plants in 1866. A lot of work was done on his theories to establish heredity and the structure of the molecules responsible for it by many scientists all throughout the world. James Watson and Francis Crick in 1950s gave us the first 3D structure of the double helix DNA which is the carrier of genetic information .

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