DNA and histone proteins are packaged into structures called chromosomes. In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes.Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.Chromosomes are not visible in the cellâs nucleusânot even under a microscopeâwhen the cell is not dividing.However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope.hromosomes are not visible in the cellâs nucleusânot even under a microscopeâwhen the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope.
What do people call the imaginary line along the top of the Rocky Mountains? Who was the original singer of Rocky Top?   'Rocky Top' was written by Felice and Boudleaux Bryant and first recorded by the Osborne Brothers in 1967; it was a hit for Lynn Anderson in 1970.
Rolling Stone Magazine felt that Presley's song was the first rock and roll recording. At the time Presley recorded the song, Big Joe Turner's  Shake, Rattle & Roll , later covered by Haley, was already at the top of the Billboard R&B charts.arious recordings dating back to the 1940s and 1950s have been cited as the first rock and roll record. A number of sources have considered the first to be  Rocket 88 , which was recorded in 1951 by Ike Turner and his band, but credited to his saxophonist and the song's vocalist Jackie Brenston.