Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 18, Problem 5TYK
Summary Introduction
Introduction: Insulin is an essential hormone produced by beta cells of pancreatic islets. The insulin controls the blood sugar level and energy production. The proinsulin is the prohormone precursor to insulin production.
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Which of the following may produce more than one functional protein from an mRNA transcript?a. chromatin condensation b. transcriptional regulation c. epigeneticsd. alternative mRNA processing
Please choose the correct answer. If nutritional requirements are not met, gene expression will most likely be regulated
a. before transcription factors enter the nucleus.
b. before ubiquitin promotes proteolytic degradation.
c. before translation initiation factors perform their tasks.
d. before transcription factors have undergone multimerization.
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.
Chapter 18 Solutions
Study Guide for Campbell Biology
Ch. 18 - In the following diagram of the lac operon, an...Ch. 18 - a. Repressible enzymes usually function in _____...Ch. 18 - a. Give an example of highly methylated and...Ch. 18 - Label the components of the following diagram that...Ch. 18 - a. How is the process of alternate RNA splicing...Ch. 18 - a. Describe how miRNAs regulate gene expression....Ch. 18 - a. What is the difference between determination...Ch. 18 - What type of evidence established that Bicoid...Ch. 18 - a. List three genetic changes that can convert a...Ch. 18 - Complete the following concept map to help you...
Ch. 18 - Fill in the following table to help you organize...Ch. 18 - Prob. 3SYKCh. 18 - Prob. 1TYKCh. 18 - Prob. 2TYKCh. 18 - Prob. 3TYKCh. 18 - Prob. 4TYKCh. 18 - Prob. 5TYKCh. 18 - DNA methylation of cytosine bases a. initiates the...Ch. 18 - Which of the following is not true of enhancers?...Ch. 18 - Prob. 8TYKCh. 18 - A eukaryotic gene typically has all of the...Ch. 18 - Prob. 10TYKCh. 18 - Prob. 11TYKCh. 18 - Which of the following statements explains why a...Ch. 18 - Prob. 13TYKCh. 18 - Prob. 14TYKCh. 18 - Prob. 15TYKCh. 18 - Prob. 16TYKCh. 18 - What would be the fate of a Drosophila larva that...Ch. 18 - Prob. 18TYKCh. 18 - Prob. 19TYKCh. 18 - Prob. 20TYKCh. 18 - Prob. 21TYKCh. 18 - Prob. 22TYKCh. 18 - Prob. 23TYKCh. 18 - Which of the following would most likely account...
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- Tumor cells from a person with leukemia have been analyzed to determine which oncogene is involved in the transformation. After partial sequencing of the gene, the predicted gene product is identified as a tyrosine kinase. Which of the following proteins would most likely be encoded by an oncogene and exhibit tyrosine kinase activity? A. Nuclear transcriptional activator B. Epidermal growth factor C. Membrane-associated G protein D. Platelet-derived growth factor E. Growth factor receptorarrow_forwardDifferential 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_forwardIn terms of gene expression, the regulation of lac operon is an example of? A. Post-transcriptional regulation B. Alternative splicing C. Splicing D. Transcriptional regulation E. Post-translational regulationarrow_forward
- Explain the different events under post transcriptional modification. A. 5'capping B. Polyadenylation C. RNA splicingarrow_forwardFor each of the following, match with the stage of gene expression being regulated. DNA methylation Feedback inhibition Operons Poly-A tail length A. Post-translational regulation B. Transcriptional regulation C. DNA packaging D. Translational regulationarrow_forwardDNA methylation is a potential example of A. post-translational control B. translational control C. transcriptional control D. allosteric controlarrow_forward
- Which of the following is an example of chromatin modification that stimulates gene expression? Group of answer choices A. alternative exon splicing b. microRNA binding to mRNA c. DNA methylation D. histone acetylationarrow_forwardPost-translational control refers to: a. regulation of gene expression after transcription b. regulation of gene expression after translation c. control of epigenetic activation d. period between transcription and translationarrow_forwardIdentify the eukaryotic level of gene regulation. Choose the correct answer below. a. Pre- transcriptional control b. transcriptional control c. translational control d. post-translational control 9. Levels of gene regulation 10. Functional insulin requires the association of two polypeptides known as the A and B chains. 11. In drosophila, differential mRNA decay rate is crucial during neural development. 12. The glycolytic enzyme pyruvate kinase is activated by dephosphorylation and inactivated phosphorylation.arrow_forward
- E. coli has five genes that code for enzymes that make tryptophan. These genes are regulated by a single promoter and transcribed as one long gene. The presence of tryptophan shut down the production of tryptophan by the cell by binding to the repressor. This changes the repressors shape allowing it to bind to DNA operator, blocking RNA polymerase and cutting off the production of tryptophan. a. Describe what woud happen to the operon if some of the cells had a mutation on the repressor, not allowing it to bind with tryptophan. The repressor is described as an allosteric protein. What does this mean? b. Does the tryptophan model demonstrate an inducible or repressible operon? What is your evidence? *arrow_forwardSelect the incorrect statement: O A. Transcription produces an mRNA of a gene that leaves the nucleus. O B. A hydrophobic hormone-receptor complex may increase the expression of a specific protein by stimulating the transcription of more of that protein's MRNA. OC Protein synthesis is a two-phase process that includes transcription and translation. O D, In the process of transcription, the entire chromosome is copied by RNA polymerase.arrow_forwardWhich translation factor mediates the aminoacyl-tRNA entry into the A site of the ribosome? A. EF-Tu B. EF-Ts C. EF-G D. IF1arrow_forward
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