How many nucleotides does $\phi \times 174$ bacteriophage contain?

Which sugar is present in the structure of $DNA$?

Which one of the following pairs of nitrogenous bases of nucleic acids is wrongly matched with the category mentioned against it?

In a $DNA$ fragment containing $6$ adenine nitrogen bases,what is the number of thymine nitrogen bases?

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 $m$)

..............is common for both $DNA$ and $RNA$ but.............is present only in $DNA$.