Which lettered area best marks the area within the dna sequence where rna polymerase would bind to ensure transcription of pmoa, pmob and pmoc as a unit?

I found the exercise on the internet and attached is the representation of the operon pmo.

The lettered area that best marks the DNA sequence where RNA polymerase would bind is a.
To ensure that all genes were transcripted, the RNA polymerase would have to start opening the double-stranded DNA before the first gene, considering the direction towards the 5' region of the sense strand. For this to happen we may consider areas a and b, as area c is already part of the gene transcription, and, therefore, the RNA polymerase would not bind (it has its own binding site), and all the other areas will not include the transcription of the pmoC gene. Between areas a and b, we should consider the different parts that constitute an operon. An operon has a binding site for the RNA polymerase, which is usually the first part of the operon. After the RNA polymerase binding site, and before the actual gene of interest, there is also an operator, which regulates the actual gene expression by repression. So, a is to be considered the RNA binding site and b the operator.

Sumitcs Sumitcs · Answer 2 · 2019-09-07T13:24:54+02:00

The lettered area that best marks the DNA sequence where RNA polymerase will bind to ensure transcription is “a”.

Further Explanation:

DNA (Deoxyribose Nucleic Acid) is a genetic material of eukaryotic as well as prokaryotic organisms. Some viruses have RNA as the genetic material.

DNA consists of nucleotides linked together through a bond known as phosphodiester bond. DNA has two strands that runs in antiparallel direction to each other and are bonded together through a bond known as hydrogen bond.

The RNA (Ribose Nucleic Acid) is synthesized from DNA by the process known as transcription. The protein synthesis occurs from the RNA strand by the process known as translation.

The transcription process requires an enzyme known as RNA polymerase that binds to the strands of DNA and synthesize the RNA strand from the DNA strand.

The RNA differs from DNA in having single strands, ribose sugar and thymine nucleotide.

RNA polymerase binds to the promoter region of the DNA strand. It then synthesize the RNA strand in the 5’-3’ direction.

Bacterial system consist of operon. The RNA polymerase binds to promoter region which here is the “a” region. After the promoter region is the operator region ahead of which is the gene of interest transcribed by RNA polymerase.

Learn more:

1. Learn more about DNA https://brainly.com/question/2416343

2. Learn more about cell cycle https://brainly.com/question/1600165

3. Learn more about RNA https://brainly.com/question/334927

Answer Detail:

Grade: College biology

Subject: Biology

Chapter: Molecular biology

Keywords:

DNA, eukaryotic, prokaryotic, viruses, nucleotides,,, phosphodiester, hydrogen bond, transcription, translation, RNA polymerase, ribose sugar, thymine, promoter region.