The two strands of $DNA$ are held together by
peptide bonds
phosphodiester bonds
hydrogen bonds
$S- S$ bonds
The given figure shows the structure of nucleosome with their parts labelled as $A,\, B$ and $C$. Identify $A,\,B$ and $C$
Cytidine is a
Which one of the following pair is a purine pair?
Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by
Assertion : $DNA$ is associated with proteins.
Reason : $DNA$ binds around histone proteins that form a pool and the entire structure is called a nucleosome.