Describe the termination process of transcription in bacteria?
class 12th CBSE Biology sample paper
Answers
The terminator is located towards 3'-end (downstream) of the coding strand and it usually defines the end of the process of transcription.
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In bacteria, there are three major types of RNAs: mRNA (messenger RNA), tRNA (transfer RNA), and rRNA (ribosomal RNA). All three RNAs are needed to synthesise a protein in a cell. The mRNA provides the template, tRNA brings aminoacids and reads the genetic code, and rRNAs play structural and catalytic role during translation. There is single DNA-dependent RNA polymerase that catalyses transcription of all types of RNA in bacteria.
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The RNA polymerase is only capable of catalysing the process of elongation. It associates transiently with termination-factor (ρ) to terminate the transcription, respectively.