The length of a helix of $DNA$ is
$10\mathring A$
$20\mathring A$
$30\mathring A$
$34\mathring A$
Choose incorrect sentence.
If a double stranded $DNA$ has $20$ per cent of cytosine, calculate the per cent of adenine in the $DNA$.
Explain the role of scientist :
$1.$ Friedrich Miescher $1869$
$2.$ Maurice wilkins and Rosalind Franklin
Nucleotides are linked by
Chargaff's rules are applicable to