Which one of the following pair is a purine pair?
Uracil, Guanine
Cytosine, Thymine
Adenine, Guanine
Adenine, Thymine
Which of the following nitrogenous bases are common for both $RNA$ and $DNA$?
Assertion : In a $DNA$ molecule, $A-T$ rich parts melt before $G-C$ rich parts.
Reason : In between $A$ and $T$ there are three $H-$ bond, whereas in between $G$ and $C$ there are two $H-$ bonds.
Explain the role of scientist :
$1.$ Friedrich Miescher $1869$
$2.$ Maurice wilkins and Rosalind Franklin
Antiparallel strands of a $DNA$ molecule means that
In $DNA$ if $10\%$ guanine is present, how much thymine is present