The $AT/GC$ ratio in human beings is (where $A = \text{adenine}$,$T = \text{thymine}$,$G = \text{guanine}$,$C = \text{cytosine}$)

Identify the carbon atom numbered from $C_1^{\prime}$ to $C_5^{\prime}$ of the monosaccharide unit of a $DNA$ nucleotide that lacks an oxygen atom from the $-OH$ group.

Which carbon atom of deoxyribose sugar in $DNA$ does $NOT$ contain the $-OH$ group?

In both $DNA$ and $RNA$,the heterocyclic base and phosphate ester linkages are at which positions of the sugar molecule?

$A$ nucleotide consists of

The base adenine occurs in