BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 16, Problem 1U
In prokaryotes, control of gene expression usually occurs at the
a. splicing of pre-mRNA into mature mRNA.
b. initiation of translation.
c. initiation of transcription.
d. All of the choices are correct.
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Which of the following statements are true about eukaryotic mRNA?a. The sigma factor is essential for the correct initiationof transcription.b. Processing of the nascent mRNA may begin beforeits transcription is complete.c. Processing takes place in the cytoplasm.d. Termination is accomplished by the use of a hairpinloop or the use of the rho factor.e. Many RNAs can be transcribed simultaneously fromone DNA template
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 why
In 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 introns
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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- Arrange the statements in their proper order by writing the corresponding letter (e.g. A) for each statement in the space provided below. A. The single-stranded RNA would complement the target RNA. B. Gene expression is inactivated once the mRNA is no longer accessible for translation. C. The risk-induced silencing complex which is composed of RNA and protein subunits is formed. D. Double-stranded, non-coding RNA is cleaved by Dicer. E. The mRNA can be cleaved or remain bound by the RISC. 1. 2. 3. 4. 5.arrow_forwardWhich 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_forwardAll of the following regarding ribosomes are true EXCEPT: A. Ribosomes are comprised of protein and RNA. B. Ribosomes coordinate with initiation and elongation factors to regulate translation. C. Ribosomes bind transcripts in their promoters. D. Prokaryotic ribosomes are comprised of a large and a small subunit. E. Ribosomes in eukaryotic cells bind to complete transcripts.arrow_forward
- Which of the following BEST describes the characteristics and function of siRNA? A. a short strand of RNA that can complement and inactivate a sequence of mRNA B. a short strand of RNA that can act as a transcription factor to initiate transcription C. a strand of DNA that can bind to and inactivate an mRNA sequence D. a tRNA that is not able to attach to a ribosome and therefore inhibits the process of translationarrow_forwardThe primary function of RF1 during translation is to: a. recognize a stop codon in the 70S A site during termination. b. recognize the start codon in the 70S P site during initiation. c. move tRNAs and mRNA through the ribosome during elongation. d. facilitate binding of the ribosome to mRNA during initiation.arrow_forwardWhich of the following statements about the spliceosome is false? a. A spliceosome splices pre-mRNA molecules. b. A spliceosome removes exons from RNA molecules. c. A spliceosome is composed of snRNPs. d. A spliceosome recognizes the exon-intron boundaries and the branch site.arrow_forward
- 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.arrow_forwardHow is translation different in prokaryotes and eukaryotes? a. In prokaryotes, because they do not have a nucleus, the translation of mRNA occurs while it is being transcribed b. In prokaryotes, pre-mRNA translation before transcription occurs within the cell c.In prokaryotes, reverse trancriptase simultaneously translates and transcribes mRNAd.In prokaryotes, functional mRNA allows for translation to be skipped, and proteins are made during transcriptionarrow_forwardThe three stages of transcription are a. initiation, ribosome binding, and termination. b. elongation, ribosome binding, and termination. c. initiation, elongation, and termination. d. initiation, regulation, and termination.arrow_forward
- Which of the following is true about the genetic code? A. A codon is three to six bases long. B. Each amino acid is specified by only one codon. C. The codon signaling the end of transcription also codes for an amino acid. D. There are multple codons signaling the start of transcription. E. All organisms use essentially the same genetic code.arrow_forwardWhich of the following is true for both prokaryotic and eukaryotic gene expression? A. After transcription, a 3' poly-A tail and a 5' cap are added to MRNA. B. Translation of MRNA can begin before transcription is complete. C. RNA polymerase binds to the promoter region to begin transcription. D. MRNA is synthesized in the 3' → 5' direction.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_forward
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