Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 9, Problem 7RQ
Portions of eukaryotic mRNA sequence that are removed during RNA processing are .
a. exons
b. caps
c. poly-A tails
d. introns
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Of the following, which is a modification made to the pre-mRNA of eukaryotes before translation?
a.
The 5’ end receives a poly-A tail
b.
All of the above
c.
The 3’ end receives a cap
d.
Introns are cut out and exons are spliced together
Eukaryotic mRNA is capped at the 5' end by:
a.
adding a poly A sequence to the 5' end.
b.
ligating a 7-methylguanylate via a 3’ linkage.
c.
methylating the base pairs near the 5’ end.
d.
forming a lariat structure via transesterification.
Which of the following mutations is most likely to cause a single amino acid difference during the translation of mRNA into protein?
A. Single base-pair insertion
B. Single base-pair deletion
C. Mutations in regulatory sites
D. Base-pair substitution
Chapter 9 Solutions
Concepts of Biology
Ch. 9 - Figure 9.10 You isolate a cell strain in which the...Ch. 9 - Which of the following does cytosine pair with? a....Ch. 9 - Prokaryotes contain a ______ chromosome, and...Ch. 9 - DNA replicates by which of the following models?...Ch. 9 - The initial mechanism for repairing nucleotide...Ch. 9 - A promoter is ______. a. a specific sequence of...Ch. 9 - Portions of eukaryotic mRNA sequence that are...Ch. 9 - The RNA components of ribosomes are synthesized in...Ch. 9 - How long would the peptide be that is translated...Ch. 9 - Control of gene expression in eukaryotic cells...
Ch. 9 - Post-translational control refers to: a....Ch. 9 - Describe the organization of the eukaryotic...Ch. 9 - Describe the structure and complementary base...Ch. 9 - How do the linear chromosomes in eukaryotes ensure...Ch. 9 - Transcribe and translate the following DNA...Ch. 9 - Describe how controlling gene expression will...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following statements are NOT true? A. Replication is the process of making DNA and takes place in the nucleus of prokaryotic cells. B. Translation produces a polypeptide that may require additional processing to become a functional protein C. Transcription starts at the promoter of eukaryotic cells and scans until reaches the start codon. D. Splicing results in exons being put together and introns being removedarrow_forwardtRNAs a. carry amino acids b. bind to the anticodon present in the mRNA c. adapt the genetic information to the ribosome d. catalyze the peptide bondarrow_forwardDegeneracy of the genetic code denotes the existence of which of the following? A. codons that can wobble at the 5' position B. multiple codons for a single amino acid C. codons consisting of only two bases D. base triplets that do not code for any amino acid E. codons that are not overlappingarrow_forward
- 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 transcriptarrow_forwardWhich of the following statements about RNA processing in eukaryotes is INCORRECT? A. The excision of introns from pre-mRNA is the only modification required to produce a mature mRNA. B. A protein/RNA complex is used to remove introns from the pre-mRNA. C. A poly A tail is added on to the 3′ end of the mRNA. D. A 7-methylguanosine cap is added on to the 5′end of the mRNA. E. Modification occurs in the nucleus.arrow_forwardIn eukaryotes, the mRNA is usually smaller than the gene, this is due to a. splicing b. transcription c. the presence of exons d. the poly A tailarrow_forward
- Which of the following help(s) to stabilize mRNA by inhibiting degradation? a. Introns b. 3'-poly(A) tail c. both the 3' cap and the 3'-poly(A) tail d. 3' cap e. exonsarrow_forwardThe AUC and AUA codons in mRNA both specify isoleucine. What feature of the genetic code explains this? a. complementarity b. nonsense codons c. universality d. degeneracyarrow_forwardA geneticist induces a mutation in eukaryote cells. The mutation results in an inability to form the poly(A) tail during processing of pre-mRNA. What does this mean for the mature mRNA and what will be the effect on these cells? Possible Answers: A. The mRNA will be spliced, but will not have a 5' cap. B. The mRNA will likely be degraded. C. The mRNA will not be cleaved. D. The mRNA will have too many Gs and Cs.arrow_forward
- Eukaryotic mRNAs a. require processing to produce mature mRNAs b. do not require processing to produce mature mRNAs c. mature mRNAs do not exist d. mature mRNAs are always bigger than the primary transcriptarrow_forwardIn eukaryotic organisms, pre-mRNA transcripts are formed and need to be modified in order to create the mature mRNA destined for translation. Which of the following indicate modifications that occur as part of this process? a. The pre-mRNA is spliced to produce multiple mature mRNAs b. A 3' poly-A tail is attached to the mature mRNA c. A 5' cap is attached to the mature mRNA d. All of the above are ways in which the pre-mRNA is modified to create the mature mRNA e. None of the above are ways in which the pre-mRNA is modified to create the mature mRNAarrow_forwardWhich of the following is not involved in the elongation of prokaryotic peptide? a. EE-Tus, EE-Ts, EF-G factors b. mRNA c. peptidyl transferase d. formyl met tRNAarrow_forward
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