The sugar found in polynucleotides is either $A$ or $B$. Choose the appropriate options to fill the blanks $A$ and $B$.

What is the distance between two consecutive base pairs in the structure of $DNA$ (in $nm$)?

How is $DNA$ chemically different from $RNA$?

$A$ $DNA$ fragment contains $3.2$ kilobases $(kb)$. If the $DNA$ fragment contains $820$ adenine molecules,calculate the number of cytosine molecules.

Identify the correct features of $DNA$ from the following statements:
$(i)$ It is made of two polynucleotide chains.
(ii) The backbone is constituted by sugar and phosphate.
(iii) The two chains have anti-parallel polarity.
(iv) The bases in the two strands are linked through $H$-bonds.
$(v)$ Both chains are coiled in a right-handed fashion.

If the base sequence in one strand of $DNA$ is "$ATCGA$", what is the total number of $H$-bonds present in the $DNA$ double helix?