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Biology
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13 Dec 2019

1. Which of the following distinguishes the sequences andfunction of prokaryotic from eukaryotic promoters?

Only prokaryotic promoters contain conserved sequences

Only eukaryotic promoters contain conserved sequences

Only in eukaryotes are accessory proteins required for bindingof RNA polymerase

Only in prokaryotes are accessory proteins required for bindingof RNA polymerase

None of the above

Answers (1) and (4)

Answers (2) and (3)

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Related questions

Which of the following statements is true?

A.) Molecules of mRNA are translated from 3' to 5'

B.) For each amino acid found naturally in proteins, there is only one codon in the genetic code.

C.)The Shine-Dalgarno sequence is found in the promoters of genes in both prokaryotic and eukaryotic organisms.

D.) During translation, both strands of DNA are used as templates for the construction of two new strands of protein.

E.) When considering the initiation of transcription one often finds consensus sequences, such as the TATA box, located in the region of the DNA where RNA polymerase(s) bind.

Eukaryotic transcription normally takes place on a chromatin template at nuclease-accessible sites.(True/False)

*After promoter clearance by RNA polymerase II:

A) all associated factors remain bound to the polymerase for elongation.

B) a subset of factors remain at the promoter region.

*Which of the following statements is FALSE?

A) RNA polymerase II is responsible for the transcription of genes encoding protein-coding sequences only.

B) Many promoters recognized by RNA polymerase II contain regulatory elements several kbp upstream of the initiation site.

C) TFIIB has a role in converting a closed-promoter into an open-promoter complex.

D) The C-terminal domain of the largest subunit of RNA pol II undergoes extensive phosphorylation prior to transcription elongation.

E) A multiprotein complex is involved in communication between upstream control elements and proteins bound at the promoter.

C) no further elongation factors are acquired by the polymerase.

D) no further chromatin remodeling is required.

E) transcription continues until the polymerase reaches the poly (A) tail

*In eukaryotes RNA polymerase I transcribes all of the ribosomal RNA components.(TRUE/FALSE)

1. How is the structure of eukaryotic DNA and chromosomes related to how transcription occurs?(Hint: histones and winding is important)

2.Compare RNA polymerase in bacteria to the RNA polymerase in eukaryotic cells? What are the structural differences? How does this relate to how each works?

3.Compare and contrast the promoters found in prokaryotes and eukaryotes.

4.How is initiation started in eukaryotes?

5.What are transcription factors and what role do they play?

6.How are elongation and termination similar in eukaryotes & prokaryotes? How do they differ?

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