Nucleic acids were discovered by

$DNA$ strand is directly involved in the synthesis of all the following except

Phosphorus is present in

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.

One turn of the helix in a B­form $DNA$ is approximately

Which of the following are all Nucleotides