Question

Suppose the DNA template sequence 5'-GGC GAC CCC CAC-3’ was replicated by a DNA polymerase. Write the resulting replication product sequence (in proper 5’ -> 3’ orientation!). Also right the resulting replication product sequence if the DNA template sequence 5'-GAC GAA CAC CCC-3’ was transcribed by a RNA polymerase.

Answer 1

As DNA synthesis only takes place at 3' end hence the 5' end is synthesized on 3' of template strand. Resultant replicatrep product will be -

Templetete 3'-CAC CCC CAG CGG-5'

Product 5'-GTG GGG GTC GCC-3'

RNA polymerases synthesize RNA not DNA

RNA sequence - 5'-GGG GUG UUC GUC-3'

As RNA bear group Uracil and not thymine hence U is complimentry present in mRNA in place of Thymine.

Retroviruses may give complimecompl DNA from RNA with the help of enzyme Reverse Transcriptase and product will be-

5'-GAC GAA CAC CCC-3'