Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 18, Problem 5TYU
Which of the following is an example of post-transcriptional control of gene expression?
- (A) the.addtion of methyl groups to cytosine base of DNA
- (B) the binding of transcriprion factors to a promoter
- (C) the removal of introns and alternative splicing of exons
- (D) gene amplification contributing to cancer
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We know that eukaryote gene regulation can occur at any point in the process of gene expression.
(a) What is the final step where gene expression control may occur in the process of protein expression ?
(b) Is this a cellular energy efficient or inefficient mechanism of gene regulation? Explain.
The functioning of enhancers is an example of(A) a eukaryotic equivalent of prokaryotic promoter functioning.(B) transcriptional control of gene expression.(C) the stimulation of translation by initiation factors.(D) post-translational control that activates certain proteins
Which of the following are possible reasons that a cell would regulate its expression of a gene? (Select all that apply.) (a) an increased need for a particular enzyme (b) a decreased need for a particular enzyme (c) increasing temperature in the external environment (d) changing needs as an organism ages (e) death
Chapter 18 Solutions
Campbell Biology
Ch. 18.1 - How does binding of the trp corepressor to the trp...Ch. 18.1 - Describe the binding of RNA Polymerase,...Ch. 18.1 - WHAT IF? A certain mutation in E. coli changes...Ch. 18.2 - In general, what are the effects of histone...Ch. 18.2 - MAKE CONNECTIONS Speculate about whether the same...Ch. 18.2 - Compare the roles of general and specific...Ch. 18.2 - Once mRNA encoding a particular protein reaches...Ch. 18.2 - WHAT IF? Suppose you compared the nucleotide...Ch. 18.3 - Compare miRNAs and siRNAs, including their...Ch. 18.3 - WH AT IF? Suppose the mRNA being degraded in...
Ch. 18.3 - Prob. 3CCCh. 18.4 - MAKE CONNECTIONS As you learned in Chapter 12,...Ch. 18.4 - MAKE CONNECTIONS Explain how the signaling...Ch. 18.4 - How do fruit fly maternal effect genes determine...Ch. 18.4 - Prob. 4CCCh. 18.5 - Prob. 1CCCh. 18.5 - Under what circumstances is cancer considered to...Ch. 18.5 - MAKE CONNECTIONS The p53 protein can activate...Ch. 18 - Compare and contrast the roles of a corepressor...Ch. 18 - Describe what must happen in a cell for a gene...Ch. 18 - Why are miRNAs called noncoding RNAs? Explsin how...Ch. 18 - Describe the two main processes that cause...Ch. 18 - Compare the usual functions of proteins encoded by...Ch. 18 - If a particular operon encodes enzymes for making...Ch. 18 - Muscle cells differ from nerve cells mainly...Ch. 18 - The functioning of enhancers is an example of (A)...Ch. 18 - Cell differentiation always involves (A)...Ch. 18 - Which of the following is an example of...Ch. 18 - What would occur if the repressor of an inducible...Ch. 18 - Absence of bicoid in mRNA from a Drosophila egg...Ch. 18 - Which of the following statements about the DNA in...Ch. 18 - Within a cell, the amount of protein made using a...Ch. 18 - Prob. 10TYUCh. 18 - draw it The diagram below shows five genes,...Ch. 18 - Prob. 12TYUCh. 18 - SCIENCE. TECHNOLOGY, AND SOCIETY Trace amounts of...Ch. 18 - WRITE ABOUT A THEME: INTERACTIONS In a Short essay...Ch. 18 - SYNTHESIZE YOUR KNOWLEDGE The flashlight fish has...
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- Genetic expression in general can be regulated at various stages. Identify specific processes that control gene expression at the: a. transcription level - b. post-transcription level - c. translation level -arrow_forwardFor each statement about gene expression mechanisms, choose the correct end to the sentence. For each gene, the template strand for transcription is determined by…. The direction of translation is determined by…… The tissue-specificity of protein production is determined by…. choices: a. location of the start codon b. location of the promoter c. direction of polymerization by RNA polymerase d. none of these e. direction of movement of ribosomes f. overall orientation of the chromosomearrow_forwardYou are teaching a class on the regulation of eukaryotic gene expression. In order to demonstrate this complex process, you decide to draw for the class a typical eukaryotic gene/transcription unit with its major regions, such as the promoter regions, where the RNA polymerase II and transcription factors would bind etc…. I need the correct answer please From the list given - choose all components that you think are part of a typical eukaryotic genearrow_forward
- What epigenetic modification(s) would you expect to see near a gene promoter where transcription is occurring? Histone acetylation 2.)Histone methylation 3.)DNA methylation 4.) a&c 5.) b&carrow_forwardRegarding transcriptional promoter sites, which of the following statements are true? Select one or more than one: a)They are located in the gene (DNA) whose information will be transcribed b)They are found at the 3 'end of the gene that will be transcribed c)Some of them are called 'TATA box' d)They are found in the DNA, 'upstream' of the gene to be transcribed. e)They are proteins of the cytoplasmarrow_forwardYou are teaching a class on the regulation of eukaryotic gene expression. In order to demonstrate this complex process, you decide to draw for the class a typical eukaryotic gene/transcription unit with its major regions, such as the promoter regions, where the RNA polymerase II and transcription factors would bind From the list given - choose all components that you think are part of a typical eukaryotic gene From the list given - choose all the regulatory sequences that you think would control the expression of this eukaryotic gene From the list given - choose all of the regulatory proteins that would bind the eukaryotic gene to control its expressionarrow_forward
- Which of the following mode of gene regulation CANNOT be regarded as "transcriptional regulation" Histone methylation Histone deacetylation (c) Differential RNA splicing DNA methylation E) Selective RNA degradation Histone acetylationarrow_forwardWhich of the following statements is most consistent with the pattern of gene expression shown in the given graph? (A) Repressors that bind to a regulatory sequence of Gene X are present in brain tissue but not in heart tissue. (B) Gene X is located within heterochromatin in brain tissue and within euchromatin in heart tissue. (C) Small RNAs that help degrade Gene X mRNA are present in brain tissue but not in heart tissue (D)Activators that bind to an enhancer of Gene X are present in brain tissue but not in heart tissue.arrow_forwardIn eukaryotic cells, transcription cannot begin until(A) the two DNA strands have completely separated and exposed the promoter.(B) several transcription factors have bound to thepromoterarrow_forward
- Regulation can occur at many steps in the pathway of gene expression. Briefly describe at least one example of a regulator at the level of: a) transcriptional initiation b) protein stability c) posttranslational protein modificationarrow_forwardTranscriptional repressor proteins (e.g., lac repressor), antisense RNA, and feedback inhibition are three different mechanisms that turn off the expression of genes and gene products. Which of these three mechanisms will be most effective in each of the following situations? A. Shutting down the synthesis of a polypeptide B. Shutting down the synthesis of mRNA C. Shutting off the function of a protein For your answers to parts A–C that list more than one mechanism, which mechanism will be the fastest or the most efficient?arrow_forwardThe expression of genes in bacterial cells can be regulated on different levels in the production of the resulting protein.(a) Name the different levels of gene regulation in prokaryotes. (b) Discuss the different mechanisms used in each of these levels.arrow_forward
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