The tallest artificial structure is Burj Khalifa, a skyscraper in Dubai that reached 829.8 m (2,722 ft) in height on January 17, 2009. By April 7, 2008 it had been built higher than the KVLY-TV mast in North Dakota, USA.
The nucleolus is a round body located inside the nucleus of a eukaryotic cell. It is not surrounded by a membrane but sits in the nucleus. The nucleolus makes ribosomal subunits from proteins and ribosomal RNA, also known as rRNA. It then sends the subunits out to the rest of the cell where they combine into complete ribosomes.
Nucleoplasm is also referred to as karyoplasm. 3. Nucleolus-can be called 'the nucleus of the nucleus'. As it is a part of the cell's organelle, it falls in to the category of sub-organelles.Nucleolus is responsible for the production of ribosomes-the protein-making devices of the cell.Ribosomes are cytoplasmic granules composed of RNA and protein. cell's endoplasmic reticulum (see chapter one of this topic) is attached to the nuclear envelope. 2. Nucleoplasm-liquid substance inside the nucleus which is similar to cell cytoplasm. Structural units of DNA and RNA (ribonucleic acid) and different enzymes are in nucleoplasm.