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<p style="text-align:justify;"> <span style="font-size:10pt;font-family:Arial;">The Perl program is to perform <strong>concatenation of two sequences or strings</strong>. The concatenation as shown in the line 4 is just done by placing a dot. Here, the value of $DNA1 is being concatenated with the value of $DNA2. Hence, we write it as “$DNA1.$DNA2” and store the result as one complete string in $DNA3.</span> </p> <p> <span style="font-size:10pt;font-family:'Courier New';"> </span> </p> <p style="margin-left:.5in;text-indent:-.25in;"> <span style="font-size:10pt;font-family:'Courier New';"><span>1.<span style="font-family:'Times New Roman';font-style:normal;font-variant:normal;font-weight:normal;font-size:7pt;line-height:normal;"> </span></span></span><span style="font-size:10pt;font-family:'Courier New';">#concatenate DNA sequence</span> </p> <p style="margin-left:.5in;text-indent:-.25in;"> <span style="font-size:10pt;font-family:'Courier New';"><span>2.<span style="font-family:'Times New Roman';font-style:normal;font-variant:normal;font-weight:normal;font-size:7pt;line-height:normal;"> </span></span></span><span style="font-size:10pt;font-family:'Courier New';">$DNA1="AGCTGCTTGGTTGCA";</span> </p> <p style="margin-left:.5in;text-indent:-.25in;"> <span style="font-size:10pt;font-family:'Courier New';"><span>3.<span style="font-family:'Times New Roman';font-style:normal;font-variant:normal;font-weight:normal;font-size:7pt;line-height:normal;"> </span></span></span><span style="font-size:10pt;font-family:'Courier New';">$DNA2="GCTGCCGTTGCAAA";</span> </p> <p style="margin-left:.5in;text-indent:-.25in;"> <span style="font-size:10pt;font-family:'Courier New';"><span>4.<span style="font-family:'Times New Roman';font-style:normal;font-variant:normal;font-weight:normal;font-size:7pt;line-height:normal;"> </span></span></span><span style="font-size:10pt;font-family:'Courier New';">$DNA3=$DNA1.$DNA2;</span> </p> <p style="margin-left:.5in;text-indent:-.25in;"> <span style="font-size:10pt;font-family:'Courier New';"><span>5.<span style="font-family:'Times New Roman';font-style:normal;font-variant:normal;font-weight:normal;font-size:7pt;line-height:normal;"> </span></span></span><span style="font-size:10pt;font-family:'Courier New';">print"concatenated seq:$DNA3\n";</span> </p> <p> <strong><span style="font-size:10pt;font-family:'Courier New';"> </span></strong> </p> <p> <strong><span style="font-size:10pt;font-family:'Courier New';">RESULTS:</span></strong> </p> <p> <span style="font-size:10pt;font-family:'Courier New';"> </span> </p> <span style="font-size:10pt;font-family:'Courier New';">concatenated seq:AGCTGCTTGGTTGCAGCTGCCGTTGCAAA</span>
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