Imagine that you and your colleagues are working in a lab to develop a protein synthesis system for a new type of synthetic cell. During your brainstorming sessions, you propose that polycistronic mRNA would be much more useful than mRNA that is only translated into one protein. This would allow for multiple proteins necessary for a particular function to be translated together. One of your colleagues says that is a good idea, but if you decide to go with polycistronic mRNA, you’d better make sure to use a prokaryotic translation system. Why might it be problematic to use a eukaryotic translation system with polycistronic mRNA? Mention three reasons:

Imagine that you and your colleagues are working in a lab to develop a protein synthesis system for a new type of synthetic cell. During your brainstorming sessions, you propose that polycistronic mRNA would be much more useful than mRNA that is only translated into one protein. This would allow for multiple proteins necessary for a particular function to be translated together. One of your colleagues says that is a good idea, but if you decide to go with polycistronic mRNA, you’d better make sure to use a prokaryotic translation system. Why might it be problematic to use a eukaryotic translation system with polycistronic mRNA? Mention three reasons:

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Description: Imagine that you and your colleagues are working in a lab to develop a protein synthesis system for a new type of synthetic cell. During your brainstorming sessions, you propose that polycistronic mRNA would be much more useful than mRNA that is only

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter9: From Dna To Protein

Section: Chapter Questions

Problem 15SA: Put the following processes in order of their occurrence during expression of a eukaryotic gene: a....

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(a) Write the sequence of the mRNA molecule synthesized from a DNA template strand having the following sequence:5'–ATCGTACCGTTA–3' (b) What amino acid sequence is encoded by the following base sequence of an mRNA molecule? Assume that the reading frame starts at the 5’ end.5'–UUGCCUAGUGAUUGGAUG–3! (c) What is the sequence of the polypeptide formed on addition of poly(UUAC) to a cell-free proteinsynthesizing system?
Could two mRNAs have different nucleotide sequences and yet code for the same protein? Explain your answer.
if the following DNA sequence were transcribed, which of the following describes the output of this process? 3'- TCTGGACA-5' A. This would produce a protein that looks like 5'- A G A C C U G U -3' B. This would produce a tRNA that looks like 3'- A G AC C U G U -5' C. This would produce an mRNA that looks like this: 5'- A G AC C U G U -3' D. This would produce an mRNA that looks like 3'- U C U G G A CA -5' E. This would produce another strand of DNA that 0ok like 5-AG ACCT GT-3. ..
If a human gene is found to contain five introns, the mature mRNA encoded by that gene would have how many exons? a) four exons b) five exons c) six exons d) there could be multiple mRNA that contain between one and six exons
Consider the following mRNA base sequence 5' CUG-CAC 3' (a) What dipeptide is coded for by this mRNA? (b) What dipeptide is formed if a mutation converts CUG to CUU? (c) What dipeptide is formed if a mutation converts CAC to CGC? (d) What dipeptide is formed if a mutation converts CUG to CUU and CAC to CGC?
What happens when one base pair of DNA is lost from the coding region of a gene because of mutation? First explain how this would affect the mRNA sequence, and second, explain how this would alter the amino acid of the protein that is encoded.
What is the name of the enzyme is responsible for transcribing the DNA sequence into mRNA? In your own words, explain what this enzyme does.
a) Two of the following three mRNA sequences code for the same protein. Delete the sequence which does NOT code for the same protein as the other two. [ /1] #1 UUU CCU AGU GGU #2 UUC CCA AGC GGC #3 UUC CCG AGA GGA b) Despite the fact that one of the mRNA sequences above codes for a different protein, it IS possible that it will be translated into the same protein as the other two. Based on what you have learned in this unit, explain how this might happen.
The base sequence of the gene coding for a short polypeptide is TAC CTA CGC TAG GCG ATT GAC T. What would be the base sequence of the mRNA transcribed from this gene? The base sequence of the gene coding for a short polypeptide is TAC CTA CGC TAG GCG ATT GAC T. From your answer to the last question, answer this Using the genetic code, give the amino acid sequence of the polypeptide translated from this mRNA. Use the three-letter abbrebviation of the amino acid and start with the start codon and stop in the stop codon.
Which of the following is not a function of the 5’ cap and 3’ poly-A tail of a mature eukaryotic mRNA molecule? a. To facilitate splicing b. To prevent mRNA degradation c. To aid export of the mature transcript to the cytoplasm d. To aid ribosome binding to the transcript
Refer to the DNA sequence provided:3’ -TACTGAAGCGGCAGCCCCGCATGAGTAGACCTTACT-5’ b. What is the amino acid sequence of the polypeptide chain that will be translated from the mRNAin (a)? (The question for A is this: What is the mRNA transcript of the anticoding strand of the DNA model?)
When scientists cut a eukaryotic gene from genomic DNA, they discovered that enabling the strands to hydrogen bond allows them to hybridize one of the gene's strands to the gene's mRNA. How can you tell whether this gene undergoes alternative splicing by comparing the various mRNAs that result?