Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 23, Problem 1AL
Even though actinobacteria are high G + C organisms, there are regions of the genome that are AT-rich. Suggest a few such regions and explain why they must be more AT-rich.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
About 98% of the E. coli genome codes for proteins, yet mRNA, the template
for protein synthesis, comprises only about 29% of the total RNA in the cell.
Explain this apparent discrepancy.
Consider the structure of Cro repressor protein from bacteriophage lambda E. It is a DNA binding protein, and like many sequence-
specific DNA binding proteins, it must function as a homodimer Ex.
Notice the mutual docking of a phenylalanine residue from each subunit into a hydrophobic pocket of the partner subunit. These
hydrophobic interactions are required for dimerization.
The noncovalent interactions highlighted in yellow are also required for dimerization. These interactions represent examples of:
Osecondary structure
O tertiary structure
O quaternary structure
O secondary AND quaternary structure
Ⓒ tertiary AND quaternary structure
The Biofuels industry is interested in engineering bacteria so that they may produce fuels such as ethanol. In one such study,
scientists generated a strain of E coli in which they deleted the rpos gene from the strain of E coli. This deletion substantially
enhance the production of ethanol. Explain the normal function of rpoS and why its deletion might improve ethanol production (limit
5-6 sentences)?
Effect rpoS Deletion on EtOH Production
[EtOH] g/L
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
0
5
10
Time (hr)
15
20
-rpos(+)
-rpos(-)
Chapter 23 Solutions
Prescott's Microbiology
Ch. 23.1 - MICRO INQUIRY Refer to table 24.2 and determine...Ch. 23.1 - MICRO INQUIRY Why do Mycobacterium spp. have...Ch. 23.1 - Prob. 3MICh. 23.1 - Prob. 1.1CCCh. 23.1 - Prob. 1.2CCCh. 23.1 - Retrieve, Infer, Apply Why are actinobacteria of...Ch. 23.1 - Prob. 1.4CCCh. 23.1 - Retrieve, Infer, Apply Compare the morphology and...Ch. 23.1 - Prob. 1.6CCCh. 23.1 - Prob. 1.7CC
Ch. 23.1 - Prob. 1.8CCCh. 23.1 - Retrieve, Infer, Apply List the distinguishing...Ch. 23.1 - Prob. 2.2CCCh. 23.1 - Prob. 2.3CCCh. 23.1 - Retrieve, Infer, Apply Describe three ways in...Ch. 23.1 - Briefly describe the defining properties of genera...Ch. 23.1 - Prob. 2.6CCCh. 23.1 - Examine the ingredients list on a commercial...Ch. 23.2 - What growth or survival advantage might this type...Ch. 23.2 - What is the net yield of ATP for each glucose that...Ch. 23.2 - Prob. 3MICh. 23.2 - Prob. 1CCCh. 23.2 - Prob. 2CCCh. 23.2 - Prob. 3CCCh. 23.2 - Prob. 4CCCh. 23.2 - How are various species of Streptococcus...Ch. 23.2 - Of what practical importance are leuconostocs?...Ch. 23.2 - What is the difference between -hemolysis and...Ch. 23.3 - The presence of an electron transport chain in a...Ch. 23.3 - In addition to its Gram-staining characteristics,...Ch. 23.3 - What are the two sources of electrons for the H....Ch. 23.4 - Prob. 1CCCh. 23.4 - Suggest why C. tetani uses a sodium motive force...Ch. 23.4 - Prob. 3CCCh. 23.4 - What kind of genetic evidence, in addition to 16S...Ch. 23 - Prob. 1RCCh. 23 - Prob. 2RCCh. 23 - Prob. 3RCCh. 23 - Prob. 4RCCh. 23 - Prob. 5RCCh. 23 - Prob. 6RCCh. 23 - Prob. 7RCCh. 23 - Prob. 8RCCh. 23 - Prob. 9RCCh. 23 - Prob. 10RCCh. 23 - Even though actinobacteria are high G + C...Ch. 23 - Given that mycolic acids are essential for...Ch. 23 - Prob. 3ALCh. 23 - Prob. 4ALCh. 23 - Prob. 5ALCh. 23 - What physiological properties might account for...Ch. 23 - S. aureus strains that are resistant to...Ch. 23 - Prob. 8AL
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- If an extra nucleotide is inserted in the first exon of the beta globin gene, what effect will it have on the amino acid sequence of the globin polypeptides? Will the globin most likely be fully functional, partly functional, or nonfunctional? Why?arrow_forwardExplain what would not occur if aminoacyl-tRNA synthatase was mutated and did not function.arrow_forwardHbS results from the substitution of valine forglutamic acid at the number 6 position in the b chainof human hemoglobin. HbC is the result of a change atthe same position in the β chain, but in this case lysinereplaces glutamic acid. Return to the genetic code table and determine whether single-nucleotide changes can account for these mutations. Then view and examine the R groups in the amino acidsglutamic acid, valine, and lysine. Describe the chemicaldifferences between the three amino acids. Predict how thechanges might alter the structure of the molecule and leadto altered hemoglobin function.arrow_forward
- The protein encoded by the cystic fibrosis gene is 1480amino acids long, yet the gene spans 250 kb. How is thisdifference possible?arrow_forwardTransposable elements, “jumping genes”, were first described by Barbara McClintock in her Nobel prize winning studies with corn. The genome of every multicellular eukaryote that has been sequenced is composed of a large percentage of transposable elements (often 30% to 50%), but they are nearly absent from the genomes of eubacteria and archaea. What are these things and what do they do? Describe and draw the structural organization and mechanism for movement of transposons and retro- transposable elements. What effect do these elements have on the stability of genomes? can you help me answer the bolded question?arrow_forwardIn the: A mutated TBP protein Explain: (a) What is the process affected? (b) What is the Effect on the process? (c) Does it affect prokaryotes, eukaryotes or both?arrow_forward
- High salt concentrations tend to cause protein aggregation. Suggest a way to identify proteins normally expressed in particular bacterial species that can retain their solubility despite high salt conditions.arrow_forwardThe E. coli genome contains approximately 4639 kb. (a) How many copies of the 6-bp recognition sequence for the trp repressor would be expected to occur in the E. coli chromosome? (b) Explain why it is advantageous for the trp repressor to be a dimer that recognizes two adjacent 6-bp sequences.arrow_forwardSickle cell disease is caused by a so-called “point mutation" in the human B-globin gene. A point mutation is the result of a single base substitution in the DNA encoding a gene. The sickle cell mutation results in substitution of Val for Glu at position 6 in the B-globin protein. (a) Using the information in Figure 5.18 explain how a point muta- tion could change a codon for Glu to a codon for Val. (b) Do you expect the pI for the sickle cell B-globin to be higher or lower than the pl for wild-type B-globin? Explain.arrow_forward
- During SDS-PAGE, glycoproteins migrate as relatively diffuse bands, whereas nonglycosylated proteins typically migrate as narrow, well-defined bands. Explain the reason for this difference in electrophoretic behavior.arrow_forwardA recent genome sequencing project for the bacterium Burkholderia mallei has identified a new protein with high similarity to the lysylphosphatidylglycerol flippase enzyme. A short section of the new protein sequence is shown below. TVEVNAPGDVQKALSELQQINDGRLDIRI (a) Are any reverse turns likely to be present? Explain your answer. (b) Are any beta-strands likely to be present? Explain your answer. (c) Are any alpha helices likely to be present? Explain your answer. (d) Is any supersecondary structure likely to be present? Explain your answer. (e) Identify two residues that are likely to be buried in the core of the folded protein. Explain your answer. (f) Identify two residues that are likely to be hydrogen bonded to each other. Explain your answer.arrow_forwardThe genomes of most multicellular eukaryotes encode~25,000 genes, yet their proteomes contain over 200,000proteins. Propose two processes that, taken together, account for this discrepancyarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
Bacterial Genomics and Metagenomics; Author: Quadram Institute;https://www.youtube.com/watch?v=_6IdVTAFXoU;License: Standard youtube license