7. The diagram below represents the full mRNA transcribed from the trp operon under conditions of lowtryptophan. Grey blocks indicate protein coding sequences. Annotate the diagram by indicating theexpected positions of the elements listed below, add more detail to the diagram if required to allowyou to accurately annotate it. Use only the letters A - H (e.g. "A" for structural genes). Where a labelrefers to a region, you must use a bracket to indicate the extent of the region in conjunction withthe specific letter.A. Structural genesB. Leader peptideC. Two adjacent trp codonsD. 5' UTR and 3' UTRE. Ribosome binding siteF. Site of potential transcription termination from attenuationG. Regions with sequence complementarityH. Stretch of Us5'EDC BA3'

1. **Structural genes (A)**: These genes are part of the trp operon and are responsible for encoding…

Answered: 7. The diagram below represents the…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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G-LO37 Identify the consequences of mutations in different regions of a gene. The image below represents two strands of DNA: the top one corresponds to a healthy individual, and the bottom one of a sibling potentially affected with a disease due to genetic mutations Mutation 1 A + с AUA ACA AUG Met ACG GUU GUC GUA GUG Val GCU GCC GCA GCG It will result in mRNA produced Mutation 2 It will result in no mRNA produced 500 AGG The protein produced will be normal 500 + GGG Ala The Select all that applies about Mutation 1 (position -6): AAGLys AGA Arg GGU GGC GGA GGG GAC Asp GAA Glu GAGJ Gly The protein produced will have a different amino acid 1235 ATT 1235 TTT 070 2070 ALL The mutation occurs in the promoter region, and this means that the mRNA cannot be produced 1535 The mRNA and protein will both be normal because the mutation occurs outside of the consensus region of the promoter G 1535 с Affected
Matching type Choices are in the picture 11. regulating elements in the operon 12. ribosome propels to the next bases 13. dozen of initiation factors involving methionly tRNA 14. eRF recognizes UGA 15. TATA box in the promoter region
36.Start with two exons and an intervening intron. Include the cap and poly-A tail in your starting pre-mRNA. Show 2’-OH, 3’-OH, O-P-O phosphodiester bonds for the two transesterification reactions that splice exon 1 and exon 2. Be sure to include the branchpoint A and intron consensus sequences. You will need to show where the incoming -OH attacks the O-P-O bond to allow correct splicing in the lariat and between exons. Make your arrows precise. Show the lariat with the consensus sequences. Whenever possible, show 5’ and 3’ ends. Explain the fate of the lariat after it forms?
The following image depicts a short stretch of sequence associated with a gene. Which of the following is true?
4) Shown below is a schematic drawing of a gene, with the transcription unit divided into numbered regions. The arrows indicate transcription initiation sites, "D" indicates a splice donor site, "A" indicates a splice acceptor site, and "An" indicates a polyadenylation signal. Indicate all the possible mRNAs that could be produced from this gene (you don't need to draw new schematics - just list the regions that would be included in each mRNA by number)
Nuclear (N) and cytoplasmic (C) mRNA samples of a gene with 2 exons and one intron run on an agarose gel along with a size marker, are shown in the gel figure below. Ntds = nucleotides 3. What is the length of the primary mRNA? HINT: Check question 3c RNA sample: N a. C ntds 1900- b. What is the length of the processed MRNA? 1250 1000 800- 650 с. If the 1250 nucleotide and 650 nucleotide fragments are spliced mRNA intermediates as indicated in the splicing diagram below, what is the size in nucleotides of Exon 1 & Exon 2. Size 1 Markers Exon Intran Exon pre-MRNA AG GU (1) (2) I spliced MRNA 2.
1. A DNA base sequence transcribed into messenger RNA in the following sequence: TTATCTTCGGGAGAGAAAACA. a. If you read from left to right, what amino acids are coded by this sequence? (Note: The initiation sequence is disregarded in this example.) b. If proflavine treatment caused the deletion of the first adenine nucleotide on the left, describe the changes that would occur in the first six amino acids coded by this sequence?
1. (a) By binding one L-tryptophan molecule/monomer, the trp repressor binds to DNA to sup- press synthesis of L-tryptophan in E. coli. Below is the amino acid sequence of the helix - reverse turn - helix region of the trp repressor that binds to DNA compared to the sequence of the corresponding DNA binding motif of the Prl protein. A diagram of the trp repressor dimer is also shown. Trp Prl Trp Prl 80 -Gly-Glu-Met-Ser-Gln-Arg-Glu-Leu-Lys-Asn-Glu-Leu-Gly-Ala-Gly-Ile- -Ser-Glu-Glu-Ala-Lys-Glu-Glu-Leu-Ala-Lys-Lys-Cys-Gly-Ile-Thr-Val- trp helix 5 70 trp helix 4 Prl helix 80 Prl helix Ala-Thr-Ile-Thr-Arg-Gly-Ser-Asn-Ser-Leu-Lys-Ala-Ala- Ser-Gln-Val-Ser-Asn-Trp-Phe-Gly-Asn-Lys-Arg-Ile-Arg- reverse turn 90 Comparing the two protein sequences above, identify all amino acid pairs that differ in electrostatic charge due to proton dissociable groups (assume pH 7). Indicate the charge of both residues for each such pair. (b) Circle the pair of residues for which the electrostatic charge due to…
The DNA region below includes the lac operon. Identify all parts (by letter) that encode PROTEINS? P O Y A 19°t
1. You are investigating a protein that has the amino acid sequence N ... Ala – Thr - Asn – Trp – Lys - Arg - Gly – Phe – Thr ... C within its primary structure. You found that several of the mutations affecting this protein produced shortened protein molecules that terminated within this region. In one of the mutants, the Asn became the terminal (last) amino acid. (a) What DNA single-base changes(s) would cause the protein to terminate at the Asn residue? (b) What other potential sites do you see in the DNA sequence encoding this protein where mutation of a single base pair would cause premature termination of translation? >
A bacterial species has a hypothetical sigma promoter that has the following sequence: TTGGCA - 18 bases - TATAAT What change in the level of transcription would there be if the sequence was mutated to: TTCGCA -18 bases -TATAAT O The mutation would bind the promoter to the consensus and produce normal levels of transcription O The mutation would inhibit the promoter thereby inhibiting transcription The mutation would move the promoter away from consensus and reduce the level of transcription O No change the consensus TATAAT sequence in the same. D00 F3 F4 F5 F6 F7 F8 F9 % & 5 6 7 8 9 %24
Matching type Choices are in the picture 6. RF1 and RF2 recognize the three bases to terminate the process 7. CAAT box is found 80 nucleotides from the actual site 8. rho factor and sequence of uracil in a loop conclude the process 9. sigma factor binds to RNA polymerase in the promoter region 10. methionine is removed

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