Explain the role of scientist :
$1.$ Watson and Crick $(1953)$
$2.$ Erwin chargaff
proposed a very simple but famous Double Helix model for the structure of $DNA$.
Erwin Chargaff that for a double stranded $DNA$ , the ratios between Adenine and Thymine and Guanine and Cytosine are constant and equals one.
In sea urchin $DNA$, which is double stranded, $17\%$ of the bases were shown to be cytosine.The percentages of the other three basesexpected to be present in this $DNA$ are
The term 'Nuclein' for the genetic material was used by
$DNA$ strands are antiparallel because of the presence of
A nucleoside differs from a nucleotide in not having
Nucleotides are linked by