In contrast, the Chrysler Building employed a very large 125 ft (38 m) spire secretly assembled inside the building to claim the title of world's tallest building with a total height of 1,048 ft (319 m), although it had a lower top occupied floor and a shorter height when both buildings' spires were excluded.
The nucleolus is a distinct structure in the nucleus of the cell composed of filamentous and granular material. It is the site of synthesis and processing of ribosomal RNA and the assembly of this RNA with ribosomal proteins into ribosomal subunits.
The nucleolus is the nuclear subdomain that assembles ribosomal subunits in eukaryotic cells. The nucleolar organiser regions of chromosomes, which contain the genes for preâribosomal ribonucleic acid (rRNA), serve as the foundation for nucleolar structure.a) Reticulated type of nucleolus, which is often found in transcriptionally active cells. These nucleoli have relatively small fibrillar centres (F) surrounded by strands of dense fibrillar component (D).