Give two reasons why both the strands of DNA are not copied during transcription.
(a) If both the strands of DNA are copied, two different RNA which are complementary to each other and hence two different polypeptides will be produced; If a segment of DNA produces two polypeptides, the genetic information machinery becomes complicated. To identify criminals in the forensic laboratory. To determine the real or biological parents in case of disputes. To identify racial groups to rewrite biological evolution. (b) The two complementary RNA molecules (produced simultaneously)would form a double-stranded RNA rather than getting translated into polypeptides. (c) RNA polymerase carries out the polymerization in 53 direction and hence the DNA strand with 35 polarity acts as the template strand.
