Pearson eText Genetic Analysis: An Integrated Approach -- Instant Access (Pearson+)
3rd Edition
ISBN: 9780135564172
Author: Mark Sanders, John Bowman
Publisher: PEARSON+
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Chapter 8, Problem 7P
The DNA sequences shown below are from the promoter regions of six bacterial genes. In each case, the last
a. Examine these sequences and identify the Pribnow box sequence at approximately
b. Determine the consensus sequence for the Pribnow box from these sequences
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The following diagram represents a transcription unit on a DNA molecule. a. Assume that this DNA molecule is from a bacterial cell. Draw the approximate locations of the promoter and terminator for this transcription unit. b. Assume that this DNA molecule is from a eukaryotic cell. Draw the approximate location of an RNA polymerase II promoter.
A human gene was initially identified as having three exons and two introns. The exons are 456, 224, and 524 bp,whereas the introns are 2.3 kb and 4.6 kb.a. Draw this gene, showing the promoter, introns, exons,and transcription start and stop sites.b. Surprisingly, this gene is found to encode not onebut two mRNAs that have only 224 nucleotides incommon. The original mRNA is 1204 nucleotides, andthe new mRNA is 2524 nucleotides. Use your drawing
Shown below is a schematic diagram illustrating a very short gene with 5000 bp region of an
unknown Schizosaccharomyces pombe genome. (Note: Transcription starts at Transcription
Start Site (TSS).)
TSS
5.
3'
3
+1
(i)
Name the specific regions that can be recognized by Transcription Factor IID (TF ID)
and indicate the locations in the diagram above.
(ii)
List the mechanistic steps that can trigger the initiation of transcription by Transcription
Factor IIH (TF IIH).
Chapter 8 Solutions
Pearson eText Genetic Analysis: An Integrated Approach -- Instant Access (Pearson+)
Ch. 8 - Prob. 1PCh. 8 - 8.2 In one to two sentences each, describe the...Ch. 8 - 8.3 Answer these questions concerning...Ch. 8 - 8.4 The diagram below shows a DNA duplex. The...Ch. 8 - The following is a portion of an mRNA sequence:...Ch. 8 - Compare and contrast the properties of DNA...Ch. 8 - The DNA sequences shown below are from the...Ch. 8 - Bacterial and eukaryotic gene transcripts can...Ch. 8 - Describe the two types of transcription...Ch. 8 - What is the role of enhancer sequences in...
Ch. 8 - Prob. 11PCh. 8 - Draw a bacterial promoter and label its consensus...Ch. 8 - For a eukaryotic gene whose transcription require...Ch. 8 - Three genes identified in the diagram as A, B and...Ch. 8 - Prob. 15PCh. 8 - 8.16 The segment of the bacterial gene involved in...Ch. 8 - Prob. 17PCh. 8 - Prob. 18PCh. 8 - 8.19 A DNA fragment from the end of the mouse...Ch. 8 - 8.20 Wild-type E. coli grow best at but can grow...Ch. 8 - A mutant strain of Salmonella bacteria carries a...Ch. 8 - 8.22 The human wild-type allele and a certain...Ch. 8 - Prob. 23PCh. 8 - A full-length eukaryotic gene is inserted into a...Ch. 8 - The accompanying illustration shows a portion of a...Ch. 8 - DNA footprint protection (described in Research...Ch. 8 - Suppose you have a 1-kb segment of cloned DNA that...Ch. 8 - Assume that a mutation affects the gene for each...Ch. 8 - 8.29 The DNA sequence below gives the first base...Ch. 8 - 8.30 Genomic DNA from a mouse is isolated,...Ch. 8 - 8.31 A portion of a human gene is isolated from...
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- A human gene was initially identified as having three exons and two introns. The exons are 456, 224, and 524 bp, whereas the introns are 2.3 kb and 4.6 kb.a. Draw this gene, showing the promoter, introns, exons, and transcription start and stop sites.b. Surprisingly, this gene is found to encode not one but two mRNAs that have only 224 nucleotides in common. The original mRNA is 1204 nucleotides, and the new mRNA is 2524 nucleotides. Use your drawingarrow_forwardConsider a gene being transcribed at a constant rate k1 and being degraded with first order kinetics with a rate constant of k2. a. Write the chemical reaction for transcriptionb. Derive the instantaneous concentration of the mRNA within the cell. Explicitly list all assumptions.arrow_forwardComparing the -10 regions of two E. coli promoters which have identical -35 regions revealed the sequence TATAAT for the first and GATACT for the second one. Why does the first promoter cause a higher transcription rate than the second one? a. The transcription rate from the first promoter will be higher, because RNA polymerase will bind TATAAT with a higher affinity than GATACT. b. It will be higher, because formation of the open promoter complex is more easily achieved with TATAAT than with GATACT. c. It will be higher, because TATAAT of the -10 region is transcribed into UAUAAU, which forms fewer hydrogen bonds with the template strand than GAUACU. d. a and b, but not c e. a, b, and carrow_forward
- A particular transposable element generates flanking direct repeats that are 4 bp long. Give the sequence that will be found on both sides of the transposable element if this transposable element inserts at the position indicated on each of the following sequences. a. Transposable element, a. 5'-ATTCGAACTGACCGATCA-3' b. b. Transposable element 5'-ATTCGAACTGACCGATCA-3'arrow_forwardThe hunchback gene contains a 5′ transcriptional regulatory region, a 5′ UTR, a structural region (the coding sequences), and a 3′ UTR.a. What important sequences required to controlhunchback gene expression are found in the transcriptional regulatory region of hunchback?b. What sequence elements that encode specific protein domains are found in the structural region ofhunchback?c. Another important kind of sequence is located inthe 3′ UTR of the hunchback mRNA. What mightthis sequence do?arrow_forwardYou made four mutants for a promoter sequence in DNA and studied them for transcription. The results of the amount of gene expression or transcription (based on beta-Gal activity shown on Y-axis) for these DNAs (X-axis) are shown. The sequence of the wild-type and mutant DNAs, and consensus sequence from many promoters are shown here for your convenience. From this experiment you can conclude that: Nucleotide substitution can identify important bases of the binding sites or promoter in DNA (e.g., -10 and -35 promoter sequences of lac operon). True or false: Spacer (a) -10 region -35 region TTGACA Consensus sequence TATAAT Wild-type Lac promoter GGCTTTACACTTTATGCTTCCGGCTCGTATGTTGTGTGGAATT Mutant 1 GGCTTTACACTTTATG-TTCCGGCTCGTATGTTGTGTGGAATT Mutant 2 GGCTTTACACTTTATGCTTCCGGCTCGTATAATGTGTGGAATT Mutant 3 GGCTTTACACTTTATG-TTCCGGCTCGTATAATGTGTGGAATT Mutant 4 GGCTTGACACTTTATG-TTCCGGCTCGTATAATGTGTGGAATT (b) 700 600- 500- 400- 300- 200- 100. 0 ● True O False B-Galactosidase activity Wild-type…arrow_forward
- The chart below is a position specific scoring matrix (PSSM, a logarithmic transformed matrix) for a transcription factor binding site. (1). Evaluate a sequence “GACATTCA” to find out which segment of the sequence fits the binding site best. (2) What is the max score that a sequence can have with this PSSM? (3) What is the minimum score a sequence can have with this PSSM?arrow_forwardThe following is a DNA sequence of gene Z. The underlined sequence represents the promoter for gene Z and the underlined and italicized sequence encodes the gene Z ribosome binding (RBS) site. Transcription begins at and includes the T/A base pair at position 60 (bold). a. What are the nucleotides of the mRNA from gene Z?b. What are the amino acids encoded by gene Z? (A codon chart is found on the final page)arrow_forwardWrite a hypothetical sequence of bases that might be found in the first 20 nucleotides of a promoter of a bacterial gene. Include both strands of DNA and identify the 5′ and 3′ ends of both strands. Be sure to include the transcription start site and any consensus sequences found in the promoter.arrow_forward
- Suppose you have a 1-kb segment of cloned DNA that is suspected to contain a eukaryotic promoter including a TATA box, a CAT box, and an upstream GC-rich sequence. The clone also contains a gene whose transcript is readily detectable. Your laboratory supervisor asks you to outline an experiment. (1) determine if eukaryotic transcription factors (TF) bind to the fragment and, if so, (2) identify where on the fragment the transcription factors bind. All necessary reagents, equipment, and experimental know-how are available in the laboratory. Complete the outline of an experiment, which determines if eukaryotic transcription factors (TF) bind to the fragment. Assume all necessary reagents, equipment, and experimental how are available in the laboratory. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Not all terms will be used. For the band shift assay, two samples of the DNA fragment are analyzed by agarose gel electrophoresis: one sample is…arrow_forwardExons 1, 2 and 3 of a human gene are 156, 224 and 524 bp long respectively. The introns 1 and2 are 546 bp and 466 bp respectively.a. Draw this gene showing the promoter, exons, introns and transcription initiationsites.b. This gene is found to encode two mRNAs. One of these mRNAs is 224 bp in shorter thanthe other.i. What is the biological process giving rise to this phenomenon called?What are the sizes of the two mRNAs (in bp) produced from this gene?arrow_forwardThe following logo plot represents the preferred cis-regulatory sequences (i.e. transcription factor binding site) of bHLH transcription factor FOSL1. C 1 2 3 4 5 6 7 8 9 10 11 position Would you expect this sequence to be recognized by a monomer, a homodimer, or a heterodimer of the protein? Explain your answer. (short phrases are sufficient; please write your answer into the template below) A- В I A -l expect FOSL1 to bind as a: (monomer, homodimer, heterodimer; please choose) B - short explanation: information content (bit) !!arrow_forward
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