Continuity of life from generation to generation in organisms is maintained by which of the following?

If a double stranded $DNA$ has $20$ percent of cytosine,calculate the percent of adenine in the $DNA$. (in $\%$)

Telomerase is an enzyme that is a/an ....

In a nucleoside,the nitrogenous base is attached to which carbon of the pentose sugar?

Single-stranded nucleic acid is found in

In an experiment,$DNA$ is treated with a compound that intercalates between the stacks of nitrogenous base pairs. As a result,the distance between two consecutive base pairs increases from $0.34 \, nm$ to $0.44 \, nm$. Calculate the length of the $DNA$ double helix (which has $2 \times 10^9 \, bp$) in the presence of a saturating amount of this compound. (in $m$)