BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 16, Problem 5A
Eukaryotic mRNAs differ from prokaryotic mRNAs in that they
a. usually contain more than one gene.
b. are colinear with the genes that encode them.
c. are not colinear with the genes that encode them.
d. Both a and c are correct.
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Students have asked these similar questions
A 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.
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
In 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 mRNA
Chapter 16 Solutions
BIOLOGY
Ch. 16.1 - Prob. 1LOCh. 16.1 - Prob. 2LOCh. 16.1 - Prob. 3LOCh. 16.2 - Explain how proteins can interact with base-pairs...Ch. 16.2 - Prob. 2LOCh. 16.3 - Prob. 1LOCh. 16.3 - Prob. 2LOCh. 16.3 - Explain control of gene expression in the trp...Ch. 16.4 - Prob. 1LOCh. 16.4 - Prob. 2LO
Ch. 16.4 - Prob. 3LOCh. 16.5 - Describe at least two kinds of epigenetic mark.Ch. 16.5 - Explain the function of chromatin-remodeling...Ch. 16.6 - Prob. 1LOCh. 16.6 - Prob. 2LOCh. 16.7 - Prob. 1LOCh. 16.7 - Prob. 2LOCh. 16 - Prob. 1DACh. 16 - What advantage might a bacterium gain by linking...Ch. 16 - Prob. 2IQCh. 16 - Prob. 3IQCh. 16 - In prokaryotes, control of gene expression usually...Ch. 16 - Prob. 2UCh. 16 - Prob. 3UCh. 16 - The lac operon is controlled by two main proteins....Ch. 16 - In eukaryotes, binding of RNA polymerase to a...Ch. 16 - In eukaryotes, the regulation of gene expression...Ch. 16 - In the trp operon, the repressor binds to DNA a....Ch. 16 - Prob. 1ACh. 16 - Specific transcription factors in eukaryotes...Ch. 16 - Repression in the trp operon and induction in the...Ch. 16 - Regulation by small RNAs and alternative splicing...Ch. 16 - Eukaryotic mRNAs differ from prokaryotic mRNAs in...Ch. 16 - In the cell cycle, cyclin proteins are produced in...Ch. 16 - A mechanism of control in E. coli not discussed in...Ch. 16 - You have isolated a series of mutants affecting...Ch. 16 - Examples of positive and negative control of...Ch. 16 - What forms of eukaryotic control of gene...Ch. 16 - The number and type of proteins found in a cell...
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- Within a cell, the amount of protein made using a given mRNA molecule depends partly on A. the presence of certain transcription factors. B. the rate at which the mRNA is degraded. C. the degree of DNA methylation. D. the number of introns present in the mRNA. please explain which is correct and incorrect and whyarrow_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_forwardThe splicing process a. occurs in prokaryotes. b. joins introns together. c. can produce multiple mRNAs from the same transcript. d. only joins exons for each gene in one way.arrow_forward
- If an MRNA is alternatively spliced, then different introns are removed from a pre-MRNA, producing transcripts that will potentially encode proteins with different primary structures. I. the MRNA is found in a bacterial cell. II. transcription and translation of the MRNA will occur simultaneously. the alternative splicing happened in the cytoplasm. IV. Ay different exons from a pre-mRNA will be spliced together. V. the different MRNAS will all have poly-A tails. VI.arrow_forwardA principle function of 5' and 3' end modifications of eukaryotic mRNA is: a. to ensure that all nucleotides are phosphorylated b. to protect RNA from nucleolytic degradation c. to guide the removal of introns d. to serve as binding sites for translation release factorsarrow_forwardWhich of the following is true about the three major classes of RNAs in the cell: mRNAs, tRNAs, and rRNAs? A. mRNAs encode polypeptide chains. B. tRNAs are structural components of the ribosome. C. rRNAs are adapter molecules that translate the information on an mRNA into a polypeptide sequence. D. mRNAs can also encode tRNAs and rRNAs.arrow_forward
- 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.arrow_forwardIn eukaryotes, MRNA processing may involve all of the following events except A. repair of MRNA mutations B. addition of a 5' cap. C. addition of a poly A to the 3' end. D. alternative splicing. E. removal of intronsarrow_forwardFollowing is the sequence of a segment of mRNA: CGA AAA GUU UUU What are the anticodons of the tRNAs that will be used for translating this mRNA segment? Group of answer choices a. CGA, AAA, GUU, and UUU b. ARG, LYS, VAL, and PHE c. GCU, UUU, CAA, and AAA d. Arg-Lys-Val-Phe e. GCT, TTT, CAA, and AAAarrow_forward
- Differential RNA splicing may result in: a. A shift in the ratio of mRNA produced from two neighboring genes b. Inversion of exons in the mature mRNA c. Production of the same protein from two different genes d. Production of two different proteins with different properties from a single genearrow_forwardWhich of the following statements is INCORRECT? a. In simultaneous transcription of mRNA, many messenger RNA may be transcribed from different DNA strand happening all at once. b. All of the following statements are incorrect c. A poly A - tail is added at the end of the 3’ base. d. In eukaryotic cells, messenger RNA must exit the nucleus and enter the cytoplasmarrow_forwardWhich of the following is not a possible size (in bp) of the mature mRNA? a. 205bp b. 180bp c. 150bp d. 100bparrow_forward
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