Advertisements
Advertisements
प्रश्न
Describe the process of transcription.
Advertisements
उत्तर
- During transcription, information of only one strand of DNA is copied into RNA.
- DNA transcription takes place in nucleus in eukaryotes whereas translation occurs in cytoplasm.
- The promotor is located towards 5’ end of structural gene.
- DNA dependent RNA polymerase catalyses polymerisation in 5’→3’ direction. So the DNA strand having 3’→5’ polarity acts as template strand. The other strand of DNA having 5’→3’ polarity is complementary to template strand.
- The information on this strand of DNA is copied on mRNA.
- The terminator is located at 3’ end of coding strand i.e. downstream. It defines the end of the transcription process.
- As the mRNA grows, the transcribed region of DNA molecule becomes spirally coiled and attains (regains) double helical form.
APPEARS IN
संबंधित प्रश्न
In which of the following synthesis of DNA strand is not involved directly?
Enzyme required for peptide formation is
Exon segments are reunited after splicing by
From the following which one is NOT needed in formation of polypeptide chain?
During transcription in prokaryotes, the enzyme RNA polymerase recognizes the promotor by its ______.
____________ refers to removal of introns and joining the exons in a defined order in a transcription unit.
The enzyme initiating the formation of mRNA is ______
Which one of the following is considered as template strand during transcription:
How many polypeptide chains are present in gamma immunoglobulin?
Given,
Transcription (eukaryotic) : Nucleus; similarly, Transcription (prokaryotic) : ______ ?
Choose the correct option.
