Human protein X is encoded by human gene X. Gene X consists of 4 exons of 200 bp each, interspersed with introns of 1,000 bp each.
An mRNA cap will be found on ____________. (Pick all that apply.)
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the primary transcript |
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the mRNA |
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at least one of the lariats |
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the poly(A) tail. |
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exon 1 |
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all exons |
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some introns |
The mature mRNA is about 800kb long Becasuse it contained only exons and poly A tail.
An mRNA cap will be found only on exon1. Beacuse only one Gpp cap bound at the 5'end of pre mRNA.
Human protein X is encoded by human gene X. Gene X consists of 4 exons of...
The typical human gene contains an average of 8 exons. The exons average about 145 nucleotides in length, and the internal introns are usually about 10x that size. Using these values, calculate the following. Please show your work so that partial credit can be given when applicable. a.(5 points) Assuming only internal introns, a 100 nucleotide 5’ untranslated region, and a 800 nucleotide 3’ untranslated region, how long is the typical pre-mRNA in humans? b.(5 points) Assuming complete and perfect...
5. A eukaryotic protein-encoding gene contains two introns and three exons: exon 1–intron 1–exon 2–intron 2–exon 3. The 5ʹ splice site at the boundary between exon 2 and intron 2 has been eliminated by a small deletion in the gene. Describe how the pre-mRNA encoded by this mutant gene would be spliced. Indicate which introns and exons would be found in the mRNA after splicing occurs
The diagram below shows a segment of DNA containing an imaginary
gene (Z) and the primary RNA transcript that results from the
transcription of gene Z. Exons are represented in green and introns
are represented in blue.
Which of the following
choices represent mRNA molecules that could be produced from the
primary RNA transcript by alternative RNA splicing? (In each
choice, the yellow part on the left represents the 5' cap, and the
yellow part on the right represents the...
QUESTION 6 Assume you are studying a protein-coding gene, ACEX, which includes 4 exons as illustrated in the gene map below. The 5' UTR and 3' UTR segments are each 25 bp long. Exons 1 thru 4 are 100, 200, 300, 400 bp long, respectively. Each intron is 200 bp each. The locations of the relevant EcoRI sites within the ACEX locus are indicated, but the location of other restriction enzyme sites (like BamHI) are not shown." EcoRI probe EcoRI...
A geneticist discovers that two different proteins are encoded by the same gene. One protein has 56 amino acids, and the other has 82 amino acids. Which of the statements are possible explanations for how the same gene can encode both of these proteins? 1-The same gene encodes both proteins by using different combinations of introns in the pre‑mRNA via alternative splicing. 2-The same gene encodes both proteins by generating a poly(A) tail on the pre‑mRNA. 3-The same gene encodes...
3. A human gene was initially identified as having three exons and two introns. In order, the exons are 456, 224, and 524 bp, while the introns are 2.3 kb and 4.6 kb. a. Draw this gene showing the promoter, introns, exons, and the transcription start and stop sites. b. Surprisingly, it is found that this gene encodes not one but two mRNAs that have only 224 nucleotides in common. The original mRNA is 1204 nucleotides, while the new mRNA...
3of 3 9. The figure below represents the primary transcript of a gene that contains four exons (A, B, C, D) and two introns. The dark block in exon B indicates the position of an additional stop codon; the normal start and stop codons for translation are present in exons A and D respectively. The two arrows indicate alternative 3' splice sites for the first intron Pre-mRNA 5'I 3' intron intron Give a schematic representation of the mature mRNAs that...
Hemoglobin is a protein that is found in red blood cells. It binds to oxygen in the lungs and it carries it to tissues and cells throughout the body. Hemoglobin is made of four polypeptide chains, two called “alpha-globins” (a) and two “beta-globins" (B). The B-globin polypeptide is produced in the cells based on the sequence of the HBB gene. The structure of the HBB gene that codes for beta-globin is represented below. The primary transcript is 1606 nucleotides long....
A eukaryotic protein-encoding gene has three introns and 4 exons. A splicing repressor commonly binds to the 3' end of the second intron (introns 2/ exon three splice sites) draw the mRNA strand before and after splicing Diagram a final functional eukaryotic mRNA molecule from the 5' end to 3' end. There should be 7 items labeled in the diagram.
QUESTION 7 Consider the hypothetical gene show here. The gene coding sequence consists of 4 exons (shown in solid colors). The 5' UTR and 3' UTR are shown as striped boxes. 25 150 200 300 400 25 Based on the lengths of the exons, you should be able to calculate a rough estimate of the protein encoded by this gene, assuming that all 4 exons are translated and the protein does not undergo any significant processing (cleavage or chemical modifications)....