The two strands of a double helix model of $DNA$ are held together by hydrogen bonds between
sugar and phosphate groups.
sugar and nitrogenous bases.
phosphate groups and nitrogenous bases.
nitrogenous bases.
Which one of the following histone is not present in the core particle of nucleosome
By using diagram, select the correct option for $X$ and $Y$
Which one of the following makes use of $RNA$ as a template to synthesize $DNA$
Assertion : $DNA$ is associated with proteins.
Reason : $DNA$ binds around histone proteins that form a pool and the entire structure is called a nucleosome.
The chemical nature of chromosome is as follows