To determine: The differences between focused and dispersed promoters.
Introduction: The DNA contains a region called the promoter. The promoters are the special sequences that initiate the process of transcription. There are two types of promoters in eukaryotes. These are core promoters and proximal promoters. The core promoters have been further categorized into two types, namely focused promoters and dispersed promoters.
To determine: The genes that are associated with focused promoters and the genes that are associated with dispersed promoters.
Introduction: The essential parts of the promoters that start the process of transcription are known as core promoters. Focused promoters and dispersed promoters are the two types of core promoters. Focused promoters have only one start site, while dispersed promoters have multiple start sites.
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Concepts of Genetics (12th Edition)
- How many types of promoters are there?arrow_forwardYou have isolated a protein that binds to DNA in the region upstream of the promoter sequence of a gene sys. If this protein is a positive regulator, which of the following would be true (multiple selection possible)? Loss-of-function mutations in the gene encoding the DNA-binding protein would cause constitutive expression of sys. Loss-of-function mutations in the gene encoding the DNA-binding protein would result in little or no expression of sys.arrow_forwarda) What is a gene promoter? b) What proteins bind to a promoter? c) What do those proteins do to control gene expression?arrow_forward
- Answer these questions concerning promoters. a) What role do promoters play in transcription? b) What is the common structure of bacterial promoter with respect to consensus sequences? c) Eukaryotic promoters are more variable than bacterial promoters. Why? d) What is the meaning of the term alternative promoter? How does the use of alternative promoters affect transcription?arrow_forwardRegarding transcriptional promoter sites, which of the following statements are true? Select one or more than one: a)They are located in the gene (DNA) whose information will be transcribed b)They are found at the 3 'end of the gene that will be transcribed c)Some of them are called 'TATA box' d)They are found in the DNA, 'upstream' of the gene to be transcribed. e)They are proteins of the cytoplasmarrow_forwardA) List the steps for gene expression in prokaryotes and eukaryotes. B) Relate the differences in gene expression between prokaryotes and eukaryotes in gene expression regulation and explain what causes those differences.arrow_forward
- What is dominant control mechanism of gene expression? explain the following image.arrow_forwardDiscuss the following argument: “if the expression of every gene depends on a set of transcription regulators, then the expression of these regulators must also depend on the expression of other regulators, and their expression must depend on the expression of still other regulators, and so on. cells would therefore need an infinite number of genes, most of which would code for transcription regulators.” how does the cell get by without having to achieve the impossible?arrow_forwarda. What is the function of operons in bacterial gene regulation? b. Describe how a bacterial operon can be regulated by repressible proteins (such as the tryptophan operon). Include in your description both the “on” and “off” states of the operon. Key elements of your diagram should include: Co-repressor, Genes, mRNA, Operator, Operon, Promoter, Repressor, RNA polymerase.arrow_forward
- What are dispersed core promoters ?arrow_forwardWhat are Focused and dispersed promoters in Transcriptions ?arrow_forwardRegarding eukaryotic genes, it is correct to state that: a) Distal enhancer-like elements decrease the intensity of gene transcription activation b) Mutations in intronic regions of a gene can alter the levels of its corresponding protein c) They are regulated only by promoter regions, being activated or repressed by the presence of transcription factors d) The junctions of exons and introns are recognized by splicing factors, which guarantee the production of the same mRNA regardless of cell type. e) Activator and repressor proteins bind to the coding region of genes, regulating the intensity of their transcriptionarrow_forward
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