$A$ nucleotide consists of

Uracil is a base present in $RNA$ with the following structure. The percentage of $N$ in uracil is $............$.
Given:
Molar mass $N = 14 \, g \, mol^{-1} ; O = 16 \, g \, mol^{-1} ; C = 12 \, g \, mol^{-1} ; H = 1 \, g \, mol^{-1}$.

Which of the following statements is $NOT$ true regarding $DNA$?

The segment of $DNA$ which acts as the instructional manual for the synthesis of the protein is

The sugar units present in natural $DNA$ and $RNA,$ respectively are

Match List $-I$ with List $-II$.

$A$. Adenine	$I$. Uracil structure
$B$. Cytosine	$II$. Thymine structure
$C$. Thymine	$III$. Adenine structure
$D$. Uracil	$IV$. Cytosine structure

Choose the correct answer from the options given below: