In the structure of $DNA$,if one nitrogenous base is Guanine,which nitrogenous base pairs with it?

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

What is the length of one full turn of the helix in $\beta-DNA$ (in $, nm$)?

Describe the structure of a polynucleotide chain of $DNA$ or $RNA$.

In the structure of $DNA$,with which nitrogenous base does adenine $(A)$ always pair?

Assertion : $DNA$ is associated with proteins.
Reason : $DNA$ binds around histone proteins that form a pool and the entire structure is called a nucleosome.