Radio Stars. Quasars are the brightest and most distant objects in the known universe. In the early 1960's, quasars were referred to as radio stars because they were discovered to be a strong source of radio waves. In fact, the term quasar comes from the words, quasi-stellar radio source.
The following DNA sequence occurs in the nontemplate strand of a structural gene in bacterium (the promoter sequence is located to the left but is not shown): 5 -GAATGTCAGAACTGCCATGCTTCATATGAATAGACCTCTAG-3 What is the ribonucleotide sequence of mRNA molecule that is transcribed from this piece of DNA?
Because the two nucleotide strands of DNA of DNA are antiparallel, replication takes place continuously on one strand (the leading stand) and discontinuously on the other ( the lagging strand). The short lengths of DNA produced by discontinous replication of the lagging strand are called Okazaki fragments. DNA Polymerase 1 cuts out the RNA primer and uses 5' to 3' polymerase activity to replace the RNA nucleotides with DNA nucleotides.