During transcription, the DNA site at which RNA polymerase binds is called:
- Promoter
- Regulator
- Receptor
- Enhancer
The Correct Option is A
Solution and Explanation
Promoters are regulatory regions of DNA located upstream (toward the 5' end) of the gene they control, and they play a crucial role in gene expression by facilitating the binding of RNA polymerase and other transcription factors.
So, the correct option is (A): Promoter
Top Questions on Molecular Basis of Inheritance
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Column-I Column-II
(a) RNA polymerase I (i) 18s rRNA
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In which position will an insertion of a thymine nucleotide result in the termination of translation?
DNA strand:
3′ T C C A C C C G A T G C 5′- CBSE CLASS XII - 2025
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Concepts Used:
Transcription
The very first stage of gene expression is the procedure of transcription. In this procedure, mRNA is the place where the genetic information is stored which later aids in encoding a protein. In this process, the DNA strand acts as a guide in the making of mRNA. Despite the fact that there is one exception which is adenine base pairs with uracil instead of thymine.
Transcription Unit:
The transcription unit is a set of freshly combined RNA molecules that have been transcribed from DNA. The cause is to encode at least one gene. A protein that has been encoded or encrypted with a DNA transcription unit may have a coding sequence. Transcription has a lower copying fidelity rate when differentiated from DNA replication.
The Stages of Transcription:
The procedure of transcription is enzymatically catalyzed into three steps:
- Initiation
- Elongation
- Termination