During the process of transcription, if one segment of DNA is converted into RNA then what happens to the other segment of DNA?

Dear student,
Please find below the solution to the asked query

Let me clear you first that DNA stranded is not converted into mRNA but the DNA strand or DNA segment only acts as a template for the enzyme RNA polymerase to synthesise the mRNA. The RNA polymerase reads the code on DNA strand and synthesises complementary RNA strand from it by joining nucleotides.

Transcription is the process of formation of mRNA from one of the strands of DNA. During transcription, only one strand called template strand is transcribed into mRNA, the other strand acts as a coding strand. After the completion of transcription, both DNA strands rejoin again to form double stranded DNA. 
The two strands of DNA are complementary to each other, they have complementary base pairs that bond with each other and form double stranded DNA helix. 



Hope this information will clear your doubts about the transcription.
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