Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 12.3, Problem 1CC
Summary Introduction
To explain: Whether ends of protein coding genes have a poly T region that acts as template for the synthesis of a poly A tail in mRNA.
Introduction: The poly A tail in mRNA is a adenine string of about 100 to 200
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For the following mRNA sequences, what is the amino acid sequence formed? Consult genetic code table for reference.
5' AGUCCGUAC 3'
5' AAUUGCUUC 3'
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A fragment of a polypeptide, Met-Thr-Ile-Ser-Asp-Ile is encoded by the following sequence of DNA:Strand A - TACGATGACGATAAGCGACATAGC - Strand B - ATGCTACTGCTATTCGCTGTATCG -Which is the transcribed (template) strand? Write the sequence of the resulting mRNA transcript. Add labels to the strands above to show the 3’ and 5’ ends.
Chapter 12 Solutions
Biology
Ch. 12.1 - What disease would result if a person inherited...Ch. 12.1 - Prob. 2CCCh. 12.1 - What is the direction of flow of genetic...Ch. 12.2 - Core Skill: Connections Look back at the role of...Ch. 12.3 - Prob. 1CCCh. 12.4 - Prob. 1CCCh. 12.4 - Prob. 1EQCh. 12.4 - Prob. 2EQCh. 12.4 - Prob. 3EQCh. 12.5 - Core Skill: Connections Look back at Figure 6.3,...
Ch. 12.5 - Prob. 2CSCh. 12.6 - Prob. 1CCCh. 12 - Which of the following best represents the central...Ch. 12 - A mutation prevents a gene from being transcribed...Ch. 12 - Prob. 3TYCh. 12 - Prob. 4TYCh. 12 - If a eukaryotic mRNA failed to have a cap attached...Ch. 12 - Prob. 6TYCh. 12 - Prob. 7TYCh. 12 - During the initiation of translation, the first...Ch. 12 - Prob. 9TYCh. 12 - Prob. 10TYCh. 12 - Prob. 1CQCh. 12 - Prob. 2CQCh. 12 - Prob. 3CQCh. 12 - Prob. 1COQCh. 12 - Prob. 2COQ
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- Given this mRNA strand: 3’ - AUGAGGAAGGUA - 5’; what are the components of the polypeptide?arrow_forwardWhen an intron is undergoing the first step in splicing, where is the first breakage of the phosphodiester backbone that occurs? (Explain)arrow_forwardA hypothetical tripeptide Leu-Leu-Leu could be synthesized by the cell. What three different base triplets in mRNA could be combined to code for this tripeptide?arrow_forward
- Given the following mRNA sequence: 5-AUCCCGUAUGCCCGGGAGCUAGCCCAGC-3 a) Label the first condon, the stop codon, the untranslated regions and predict the amino acid sequence of the polypeptidarrow_forwardGiven the following mRNA transcript: 5’-UUUGGCAUGGGUAUCGUAGAGAUGGAAUUCAUAGUGGAGUAA-3’ What is the one-letter abbreviation of the protein product of the mRNA transcript?arrow_forwardWhat amino acid sequence does the following mRNA nucleotides sequence specify? 5'- AUGGCCAGCUGU -3' Express the sequence of amino axis's using the three-abbreviations, separate hyphens (e.g., Met-Ser-Thr-Lys-Gly).arrow_forward
- One of the codons in mRNA that specifies the amino acid phenylalanine is UUC. What is the anticodon on the tRNA that carries phenylalanine?arrow_forwardExplain why the translation of a given mRNA can be inhibited by a segment of its complementary sequence, a so-called antisense RNA.arrow_forwardThe following segment of mRNA encodes an interstitial segment of a polypeptide (thedifferent codons appear separately): 5'... AAU CUA UUC AUU AAA ACC ... 3'a) Determine the sequence of the two strands of the DNA fragment from which this RNA comes. highlighting the sense and antisense strandb) What will be the corresponding amino acid sequence that originates in the translationarrow_forward
- In eukaryotic cells, mRNAs have been found to have a circular arrangement in which proteins hold the poly-A tail near the 5’ cap. How might this increase translation efficiency?arrow_forwardAlthough the RBS (Ribosome-Binding Site) sequences vary considerably in different genes, they include examples like GAGGGG that could serve as code for Glu-Gly. Does this imply that the amino acid sequence Glu-Gly can never occur in a protein, lest the two mRNA codons be read as a RBS sequence? Explain your answer.arrow_forwardExplain the term polycistronic mRNA.arrow_forward
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