Campbell Essential Biology with Physiology (6th Edition)
6th Edition
ISBN: 9780134711751
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 11, Problem 3SQ
The regulation of gene expression must be more complex in multicellular eukaryotes than in prokaryotes because
- a. eukaryotic cells are much larger.
- b. in a multicellular eukaryote, different cells are specialized for different functions.
- c. prokaryotes are restricted to stable environments.
- d. eukaryotes have fewer genes, so each gene must do several jobs.
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The advantage of yeast cells over bacterial cells to express human proteins is that: a. yeast cells grow faster b. yeast cells are easier to manipulate genetically c. yeast cells are eukaryotic and modify proteins similarly to human cells d. yeast cells are easily lysed to purify the proteins
All 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.
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.
Chapter 11 Solutions
Campbell Essential Biology with Physiology (6th Edition)
Ch. 11 - Your bone cells, muscle cells, and skin cells look...Ch. 11 - A group of prokaryotic genes with related...Ch. 11 - The regulation of gene expression must be more...Ch. 11 - A eukaryotic gene was inserted into the DNA of a...Ch. 11 - How does dense packing of DNA in chromosomes...Ch. 11 - What evidence demonstrates that differentiated...Ch. 11 - The most common procedure for cloning an animal is...Ch. 11 - What is learned from a DNA microarray?Ch. 11 - Which of the following is a substantial difference...Ch. 11 - Prob. 10SQ
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- Exposing Escherichia coli (e.coli) to ionizing radiation results in DNA damage. Say you perform an experiment and expose E. coli to increasing levels of ionizing radiation over time. After 180 minutes, all bacteria cells are found dead. 1. How do levels of LexA change over 180 minutes? Explain what is driving this change? 2. What changes in gene expression would occur over the course of the 180 minutes as a direct result of the changes in LexA levels? Detail how changing levels of LexA lead to such changes in gene expression.arrow_forwardWhich of the following is NOT a method by which bacteria can be resistant to antibiotics? Select one: a. Utilise an alternate pathway of gene expression that is not targeted by the antibiotic. b. Alter the binding site of the antibiotic, to either prevent it binding, or remove it from the site. c. Production of enzymes that bind to and break down the specific antibiotic. d. Production of a cell membrane pump that translocates antibiotics outside the cell. A potential side effect of antibiotic use is a secondary bacterial or fungal infection, usually associated with regions like the skin, upper-respiratory tract or genitalia. What is the most likely reason for the formation of these secondary infections? Select one: a. Antibiotics do not work on viruses, so they are able to establish infections in these locations. b. Organisms that are antibiotic resistant are usually more virulent, meaning they can survive and cause infection. c. The antibiotic kills off normal flora, providing an…arrow_forwardWhich of the following statament is NOT TRUE about gene expression?a. The expression of genes that code for proteins includes two stages: replication and translationb. Translation is the synthesis of a polypeptide using the information in the mRNA.c. During gene expression, the information encoded in genes is used to make specific polypeptide chains or RNA molecules.d. Gene expression is the process by which DNA directs the synthesis of proteinsarrow_forward
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- Which of the following statements is TRUE regarding the nucleo-cytoplasmic interaction? * A. Nuclear genes control metabolic processes occuring in the cytoplasm. B. Molecules in the cytoplasm cannot influence expression of genes in the nucleus. C. Cytoplasmic transplantation experiments have provided evidence for the validity of this concept. D. Molecules can move from the nucleus to the cytoplasm, but not from the cytoplasm into the nucleus.arrow_forwardImagine that mutations occurred in one of the inverted repeat sequences within the rho-independent terminator sequence of a bacterium. What would likely be the consequence of this mutation? Select one: a. Transcription may not be initiated at all. b. Transcription may end prematurely. c. Transcription may be delayed. d. The rho protein won't be able to bind and transcription may not be terminate. e. Transcription may not be terminated and result in much longer RNA.arrow_forwardIf a cell's DNA was mutated such that it lost the promoter of a gene, you would expect: a. That ribosomes wouldn’t bind to that gene b. No effect since the promoter doesn't have any coding information for the amino acids in the polypeptide c. Ribosomes would never stop translating that gene d. Transcription factors for that gene would no longer bind to activate expression of that gene e. tRNA would no longer bind to the codons of that genearrow_forward
- You genetically engineered a cell to no longer contain the extracellular domain of an integrin. What is the most likely effect of losing this domain on the cell's ability to bind? A It would affect the cell's ability to attach to the ECM. B It would have no effect on the cell's ability to attach to anything. C It would affect the cell's ability to attach to the cytoskeleton through adaptor proteins. D It would affect both the cell's ability to attach to other cells and the cell's ability to attach to the cytoskeleton.arrow_forwardWhich of the following gene regulation mechanisms are found ONLY in prokaryotes? a. coordinate regulation b. transcriptional regulation c. alternative splicing d. translational regulation e. DNA modificationsarrow_forwardWhich of the following statements about codons in prokaryotic cells and eukaryotic cells is correct? A. Prokaryotic codons are longer than eukaryotic codons. B. Eukaryotic codons are made of DNA, and prokaryotic codons are made of RNA. C. Prokaryotes do not have mRNA, so there are no codons. D. Codons are very similar, no matter whether the cell is prokaryotic or eukaryotic.arrow_forward
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