WHAT IS DNA ?

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=28 BGCOLOR="#006699" TEXT="#080000"> <div> <FONT SIZE="2" COLOR="#FFFFFF" FACE="Arial" ><B>CHEMISTRY SCHOOL</B></FONT><FONT SIZE="1" COLOR="#FFFFCC" FACE="Arial" ><B> </B></FONT><B>                      </B><FONT SIZE="1" COLOR="#FFFFCC" FACE="Arial" ><B> </B></FONT><A HREF="index.htm" TARGET="_top" TITLE="CHEMISTRY SCHOOL"><U>HOME PAGE - INDEX TO THE LESSONS</U></A>  <B>             </B>PAGE  3   HUMAN GENOME REFERENCE</div> <div> <A HREF="what_is_a_helix.htm" TARGET="_top" TITLE="WHAT IS A HELIX AND WHAT IS RNA and DNA "><U>WHAT IS A HELIX AND WHAT IS RNA and DNA ?</U></A>   |   <A HREF="our_genes_and_dna.htm" TARGET="_top" TITLE="OUR GENES and DNA"><U>OUR GENES and DNA</U></A>   |   <B>WHAT IS DNA ?</B>   |   <A HREF="ladder_concepts.htm" TARGET="_top" TITLE="TWISTED LADDERS"><U>TWISTED LADDERS</U></A></div> <div> </div> </td> </tr><tr> <td valign="top" width=212 BGCOLOR="#FFCC66" TEXT="#080000"> <div>     WHAT IS A DOUBLE HELIX</div> <div>     AND WHAT IS RNA and DNA ?</div> <div> -------------------------------------------</div> <bR> <div> TABLE OF CONTENTS</div> <div> <A HREF="what_is_a_helix.htm" TARGET="_top" TITLE="WHAT IS A HELIX AND WHAT IS RNA and DNA "><U>PAGE 1   WHAT IS A HELIX ?</U></A></div> <div> <A HREF="our_genes_and_dna.htm" TARGET="_top" TITLE="OUR GENES and DNA"><U>PAGE 2   OUR GENES and DNA</U></A><A HREF="our_genes_and_dna.htm" TARGET="_top" TITLE="OUR GENES and DNA"><U>  </U></A></div> <div> <A HREF="what_is_dna_m.htm#dna___what_is_dna__" TARGET="TRLX_Middle" TITLE="WHAT IS DNA ?"><U>PAGE 3   DNA, WHAT IS DNA ?</U></A></div> <div> <A HREF="ladder_concepts.htm" TARGET="_top" TITLE="TWISTED LADDERS"><U>PAGE 4  TWISTED LADDERS</U></A></div> <bR> <bR> <bR> <bR> <bR> <bR> <bR> <div>  </div> </td> <td valign="top" height=452 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <I><B> <TABLE BORDER="0" CELLPADDING="2" CELLSPACING="1" WIDTH="496" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 1150 ><NOBR><div> <I><B>   DNA?...WHAT ARE DNA ?                                                  </B></I><FONT SIZE="1" COLOR="#006699" FACE="Arial" ><I><B> <A NAME="dna___what_is_dna__"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A></B></I></FONT><I><B>        </B></I></div> <div>   IF YOU CAN REMEMBER,THAT THE FIRST, LONG COILED UP MOLECULE,</div> <div>   THAT LOOKED LIKE, THE RIBS OF A SKINNY PERSON,</div> <div>   WAS CALLED, RIB-O-NUCLEIC ACID AND THAT IT IS ABBREVIATED <B>RNA,</B></div> <div>   THEN IT MAY BE EASY, TO REMEMBER, THAT THE LONG COILED UP,</div> <div> <B>  D</B>OUBLE <B>N</B>UCLEIC <B>A</B>CID MOLECULES, ARE CALLED THE <B>DNA </B>MOLECULES</div> <div> <TABLE BORDER="0" CELLPADDING="2" CELLSPACING="1" WIDTH="439" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 220 ><NOBR><div> <IMG SRC="1bb313a20.gif" border=0 width="275" height="162" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div>     THE TWO COILED UP, NUCLEIC ACID MOLECULES,</div> <div>     IN THE CENTER, OF OUR COILED CHROMOSOMES,</div> <div>     ARE CALLED, DNA MOLECULES</div> </NOBR></tD> </tR> </TABLE></div> <div>     </div> <div>      SCIENTIFIC BOOKS, ALSO REFER TO THEM AS, </div> <div> <B>   D</B>E-OXY-RIB-O-<B>N</B>UCLEIC <B> A</B>CIDS,</div> <div>      BECAUSE, THE RIBOSE SUGAR MOLECULES, IN THEM,</div> <div>      THAT BOND,THE NUCLEIC ACIDS TOGETHER, TO MAKE THE DNA,</div> <div>      HAVE LESS OXYGEN, THAN THE SUGAR MOLECULES,THAT ARE IN RNA.</div> <div> THE <B>DE,</B> IN THE NAME, <B>DE</B>OXYRIBONUCLEIC ACID, </div> <div> IS SIMILAR TO, THE DE, IN DEFATTED, </div> <div> WHICH MEANS, THE FAT HAS BEEN REDUCED.</div> <div> YOU WILL FIND, THAT FOODS, WITH A HIGH PERCENTAGE, OF DNA TO RNA </div> <div> TEND TO BE, A LITTLE MORE BITTER. </div> <div> FOR EXAMPLE:</div> <div> PEACHES, ARE MORE BITTER THAN APRICOTS.</div> <div> REGULAR ORANGES, ARE MORE BITTER THAN VALENCIA ORANGES.</div> <div> TOASTED BREADS, ARE A LITTLE MORE BITTER, THAN FRESH BREADS.</div> <div> IN GENERAL, FOODS HIGH IN DNA, ARE ALSO, MORE DIETETIC.</div> <div> SO,YOU MIGHT LIKE TO THINK OF THEM AS THE <B>D</B>IETERS <B>N</B>UCLEIC<B> A</B>CIDS</div> <div> BECAUSE, FOODS VERY HIGH IN RNA ARE VERY FATTENING.</div> <bR> <div> SO NOW YOU KNOW, </div> <div> THE LONG COILED UP, <B>D</B>OUBLE <B>N</B>UCLEIC <B>A</B>CID...MOLECULES</div> <div> ARE CALLED DNA,</div> <div> AND THAT IT IS A GOOD TO EAT, DIETERS NUCLEIC ACID..<B>DNA FOODS</B></div> <div> BECAUSE, YOU KNOW,</div> <div> <FONT SIZE="1" COLOR="#993366" FACE="Arial" >THEY ARE ALSO CALLED,  </FONT><B>D</B>E-OXY-RIBO-<B>N</B>UCLEIC <B>A</B>CIDS,</div> <div> BECAUSE, THEY HAVE LESS OXYGEN, ( AND ARE A LITTLE BITTER  )</div> <div> AND A LITTLE BETTER FOR YOU.</div> <div> NOW, IF YOU WANT TO KNOW, WHY THEY DESCRIBE IT, AS TWISTED LADDER,</div> <div> YOU HAD BETTER <A HREF="ladder_concepts.htm" TARGET="_top" TITLE="TWISTED LADDERS"><U>CLICK ON PAGE 4</U></A></div> <bR> </NOBR></tD> </tR> </TABLE></B></I></div> <div> <I><B> </B></I></div> </td> </tr></table></body>