Which molecule contains all the information required for carrying out all life processes?

The bond between the phosphate group and the hydroxyl group of sugar 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.

In one nucleosome,which one of the following histone molecule is $NOT$ double?

Sugars are attached to the pyrimidines by the formation of

Telomeric repetitive $DNA$ sequences control the function of eukaryotic chromosomes because they...