$A$ nucleosome is composed of:

$A$ gene is defined as ...........

The telomeres of eukaryotic chromosomes consist of short sequences of

Gene can be defined as

If $A$ and $C$ make $30\%$ and $20\%$ of $DNA$,respectively,what will be the percentage composition of $T$ and $G$?

$A$: In a $DNA$ molecule,the proportion of purine and pyrimidine bases is equal.
$R$: In $DNA$,two purines or two pyrimidines do not pair opposite each other.