In eukaryotes, the size of the primary transcript is generally the gene in the template dna strand. see section 17.2 (page 353) .

In  eukaryotes,  the  size   of   the  primary  transcript   is   generally  of   the   same  length with  the   gene  in  the  template  DNA  strand.The  primary  transcript  is  an  exact   of  DNA   coding  sequence.  The  primary  transcript  is   synthesized  by  transcription  of  DNA  and   is  processed  to  yield  various  mature  RNA  product  such  as  m RNA  and t RNA

The speed of  sound:   sound travels  at different speeds depending on what it istraveling through. of the three mediums (gas, liquid, and solid)  sound waves travel the slowest through  gases, faster  through  liquids, and fastest  through  solids.