Site on dna where rna polymerase attaches to begin transcription

Asked by admin @ 22/11/2021 in Biology viewed by 277 People

Where does RNA polymerase begin transcribing a gene into mRNA?

A) It starts at one end of the chromosome.
B) It starts after a certain nucleotide sequence called a promoter.
C) Transfer RNA acts to translate the message to RNA polymerase.
D) It looks for the AUG start codon.
E) The ribosome directs it to the correct portion of the DNA molecule.

Answered by admin @ 22/11/2021

Answer:

The correct answer will be option-B

Explanation:

The process of transcription transcribes the sequence of the bases of genes present on DNA to mRNA which acts as a messenger molecule for the protein synthesis.

The process of transcription is mediated by the presence of enzymes which includes the main transcription enzyme called RNA polymerase. RNA polymerase attaches nucleotides to RNA strand.

The transcription process initiates in three stages: initiation, elongation and termination.

The initiation process begins when RNA polymerase binds to the promoter nucleotide sequence which is present at the start site or the upstream on DNA towards 5' end.

Thus, Option-B is the correct answer.

Site on dna where rna polymerase attaches to begin transcription

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