Telomerase is an enzyme which is a

$A$ genome is the

In one turn of the $DNA$ helix,there are $.........\,bp$ and its length is $.........$.

Assertion $(A) :$ The distance between two polynucleotide chains in $\text{dsDNA}$ remains constant.
Reason $(R) :$ Always a purine comes opposite to pyrimidine or vice versa.

The carrier of genetic information is .......

The length of $DNA$ in $E. coli$ is . . . . . . .