Nucleic acids were discovered by
Watson and Crick
Khorana
Wilkins
Miescher
In a nucleus, the number of ribonucleoside triphosphates is $10$ times the number of deoxy $x10$ ribonucleoside triphosphates, but only deoxy\ ribonucleotides are added during the $DNA$ replication. Suggest a mechanism.
If a double stranded $DNA$ has $20$ per cent of cytosine, calculate the per cent of adenine in the $DNA$.
Describe the structure of polynucleotide chain of DNA or RNA ?
Purines of $DNA$ are represented by