Is RNA is also coiled by histone protein and where the RNA is present ?
Yes, RNA is also coiled.
Chromatin is a complex of DNA, RNA, and protein found in eukaryotic cells. DNA wraps around histone proteins, forming nucleosomes and the so-called “beads on a string” structure (euchromatin). Multiple histones wrap into a 30-nanometer fibre consisting of nucleosome arrays in their most compact form (heterochromatin).