Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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What is the total size of the mature i.e. fully processed mRNA in nucleotides ?
How many amino acids would the encoded protein be? Assume that the N- terminal Met encoded by the AUG start codon, is NOT cleaved from the protein?
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- Sequence: CCACCTGTACCCGGACACACCCTGGTGTCC Provide the FULL protein sequence encoded by the gene. Are different splice variants known for this gene?arrow_forwardIntrons are often very large and the cell has devoted mechanisms of eliminating them once they are excised from the pre-mRNA. Following intron excision, what specific ribonucleolytic enzymes or complexes contribute to eliminating the intron RNA immediately after it is excised from the pre-mRNA? Briefly describe the role of each step/enzyme and how it affects its RNA substratearrow_forwardThe template strand (i.e.: the strand that is transcribed into RNA, which is usually represented “at the bottom”) of a segment of double helical DNA contains the sequence (5′) TCCGCTCCATCG (3′). What is the base sequence of the mRNA that can be transcribed from this strand?arrow_forward
- Consider the now dominant variant of the SARS-CoV-2 called the D614G mutation: a) The mutation changes an Aspartate (D, Asp) to a Glycine (G, Gly) at nucleotide position 614 (that’s why it’s called the D614G mutant) in the S1 subunit of the Spike protein. Using only the information above and a codon table, what are the mRNA codon sequences of the 2019-dominant and 2020-dominant Spike proteins? Note the figure above is not needed toanswer the question. Report in 5’ to 3' orientation __________________________________________ b) What type of substitution is this? In your answer, address the following: • The expected substitution in base sequence (e.g., A à C)• If the mutation is synonymous, nonsynonymous, or a frameshift• If the mutation is a transition or a transversion c) The mutation increases infectivity by reducing the stability of the Spike protein such that it can remain in the open conformation more often. The open conformation increases the chances of binding to the host ACE2…arrow_forwardIf the two ribosomal subunits did not come together during translation, and the small subunit attempted to facilitate translation alone, why would translation not occur? Explain with reference to mRNA and tRNA.arrow_forwardDefine both transcription and translation. In addition, describe the role(s) of each of the following in the processes of gene expression and protein synthesis: DNA, mRNA, tRNA, rRNA, ribosome(s), RNA polymerase, codon, anticodon, amino acid(s) and polypeptide(s). Be detailed in your answer.arrow_forward
- A synthetic mRNA added to a cell-free protein-synthesizing system produces a peptide with the following amino acid sequence: Met-ProIle-Ser-Ala. What would be the effect on translation if the following component were omitted from the cell-free protein-synthesizing system? What, if any, type of protein would be produced? Explain your reasoning. Q. Elongation factor Tuarrow_forwardWhat are the “protein synthesis factories?” Give an overview of the relationship between these “factories” and mRNA to explain why they are called the “protein synthesis factories.arrow_forward
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