During transcription, what happens to the rna polymerase if a repressor protein attaches to the operator? ​


RNA Pol. is inhibited and DNA does not get transcribed
During transcription, the thing that happens to the RNA polymerase if a repressor protein attaches to the operator is that D. it cannot attach to the promoter. 
A nucleic acid is ribonucleic acid or RNA is a polymer consisting of nucleotides. Each nucleotide is a nitrogenous base, consisting of a ribose sugar and a phosphate. RNA plays many important biological roles, among them genetic information carried in DNA protein translation (translation) is located in the various related processes. Messenger of the RNA types of RNA, the information in the DNA carries protein synthesis in place with the ribosomes, ribosomal RNA ribosome forms the most important part, the carrier is required for the transport of RNA is to be used to be used in the synthesis of protein amino acids. In addition, various types of RNA editing is to what extent the benefits of active genes.
RNA, DNA differs in certain constructional details but are very similar. RNA is usually single stranded in the cell, DNA is usually double-stranded. RNA nucleotides contain ribose, deoxyribose DNA is (a type of missing oxygen atoms, a ribozyme) are. Uracil in DNA is replaced in some RNA and thymine bases in RNA is usually subject to further chemical modification. RNA, DNA reading of the RNA polymerase (transcription) were synthesized, and then undergoes further processed by the other enzymes. Some of these RNA processing enzyme comprise their own RNA.

The correct answer is:

D). It cannot attach to the promoter.


It cannot attach to the promoter. Only the proteins that the bacteria Escherichia coli (E. coli) needs are integrated at any given time. A transcription factor can operate as a transcription activator as strong as a transcription repressor. The same transcription factor can work as a repressor for a group of genes and activator for another group. Such function has temporary and/or spatial specificity. A number of oncogenes are transcriptional activators during early development but repressor through adulthood, their strange expression drives to cell proliferation and tumor development/oncogenesis.

The answer is It cannot attach to the promoter. The operator is usually close to the promoter region. When the suppressor protein attached to the operator , it physically acts as  a barrier that prevents the RNA polymerase from binding on the operator. This is a transcriptional negative regulation of a gene in most cells.  

It cannot attach to the promoter.



If a repressor protein attaches to the operator, RNA polymerase cannot proceed to transcribe key enzymes needed by the organism. This can be seen in the trp operon in E .coli bacteria.

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