Brock Biology of Microorganisms (15th Edition)
15th Edition
ISBN: 9780134261928
Author: Michael T. Madigan, Kelly S. Bender, Daniel H. Buckley, W. Matthew Sattley, David A. Stahl
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 6.9, Problem 1CR
Explain the sequence of molecular events that leads to the synthesis of (p)ppGpp in Escherichia coli during the stringent response.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Some are unable to taste thiourea and PTC. DNA sequence results for these individuals show a normal predicted amino acid sequence for the TAS2R38 gene. Provide an explanation that can account for insensitivity to thiourea.
(a) First assuming a mutation involving the TAS2R38 gene
(b) Then assuming a mutation in a gene other than TAS2R38
When lactose is added to growing culture of E. coli, the cells begin to make enzymes necessary for lactose utilization. In contrast, when tryptophan is added to the culture medium, synthesis of the enzymes for tryptophan pathway ceases. Contrast the two systems explaining why they act in reverse directions
Usually, bacteria only make tryptophan when
tryptophan is absent or available in low
concentration. However, a particular bacterial
mutation makes tryptophan all the time
whether or not tryptophan is present. What
could explain this phenotype?
A) the terminator hairpin is unable to form
B) the antiterminator hairpin is unable to form
C) trpE is mutated
D) trpD is mutated
E) trpA is mutated
Chapter 6 Solutions
Brock Biology of Microorganisms (15th Edition)
Ch. 6.1 - What is protein domain?Ch. 6.1 - Why are most DMA-binding proteins specific to...Ch. 6.1 - Describe why a protein that binds to a specific...Ch. 6.2 - Why is negative control so named?Ch. 6.2 - How does a repressor inhibit the synthesis of a...Ch. 6.2 - Induction is considered the opposite of enzyme...Ch. 6.3 - Prob. 1MQCh. 6.3 - Prob. 2MQCh. 6.3 - What is the difference between an operon and a...Ch. 6.4 - Prob. 1MQ
Ch. 6.4 - Prob. 2MQCh. 6.4 - Explain how the lac operon is both positively and...Ch. 6.4 - Prob. 1CRCh. 6.5 - What is the major difference between...Ch. 6.5 - How do transcriptional activators in Archaea often...Ch. 6.5 - Explain how the Pyrococcus furiosus TrmBL1...Ch. 6.5 - Prob. 1CRCh. 6.6 - What are kinases and what is their role in...Ch. 6.6 - Prob. 2MQCh. 6.6 - Prob. 1CRCh. 6.7 - What are the primary response regulator and the...Ch. 6.7 - Why is adaptation during chemotaxis important?Ch. 6.7 - How does the response of the chemortaxis system to...Ch. 6.7 - Adaptation allows the mechanism controlling...Ch. 6.8 - What advantage do quorum-sensing systems confer on...Ch. 6.8 - Prob. 2MQCh. 6.8 - Prob. 3MQCh. 6.8 - How can quorum sensing be considered a regulatory...Ch. 6.9 - Which Escherichia coli genes are activated and...Ch. 6.9 - Prob. 2MQCh. 6.9 - What are some other conditions that trigger the...Ch. 6.9 - Explain the sequence of molecular events that...Ch. 6.10 - Prob. 1MQCh. 6.10 - Prob. 2MQCh. 6.10 - Prob. 3MQCh. 6.10 - Prob. 1CRCh. 6.11 - Prob. 1MQCh. 6.11 - Prob. 2MQCh. 6.11 - Prob. 3MQCh. 6.11 - What are the mechanisms by which regulation by...Ch. 6.12 - What happens when a riboswitch binds the small...Ch. 6.12 - What are the major differences between a repressor...Ch. 6.12 - What is the mechanism by which a riboswitch...Ch. 6.13 - Why does attenuation control not occur in...Ch. 6.13 - Prob. 2MQCh. 6.13 - Prob. 1CRCh. 6.14 - What is feedback inhibition?Ch. 6.14 - Prob. 2MQCh. 6.14 - Prob. 3MQCh. 6.14 - Describe how feedback inhibition is reversible.Ch. 6.15 - What types of covalent modifications commonly...Ch. 6.15 - Prob. 2MQCh. 6.15 - Explain the role of an anti-sigma factor.Ch. 6.15 - Which nucleotides are commonly used to covalently...Ch. 6 - What would happen to regulation from a promoter...Ch. 6 - Most of the regulatory systems described in this...Ch. 6 - Many amino acid biosynthetic operons under...Ch. 6 - How would you design a regulatory system to make...
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
- A)Carrier of the activated amino acids to the ribosomes for incorporation into the growing peptide chain. B)Molecule that attaches to myosin and actin during muscle contraction. C)The reduced cofactor important in the TCA cycle and used in the last part of respiration. Please identify the terms.arrow_forwardDescribe the mechanism of action of lysozymearrow_forwardWhich statement among A-D is false regarding bacterial toxins? A) O Hemolysıns are cell membrane disrupters that can rupture red blood cells. B) O Second mesengar pathway disrupters like cholera toxin produces a debilitating respiratory condition of the lungs. C) O Shiga toxin, tetanus toxin, and hemolysins are all types of exotoxins. D) O Superantigens elicit a hyperactive response by the immune system and can lead to shock. E) O None are false, A-D are all true statements.arrow_forward
- Give typing answer with explanation and conclusion to all partsarrow_forwardWhat is the molecular basis for methicillin resistance in certain strains of S. aureus (MRSA)?arrow_forwardDraw the mechanism of action of an HIV protease. Label the substrate, the intermediates, and the products. Indicate each type of catalysis that occurs throughout the mechanism..arrow_forward
- What signal does the chaperone-mediated autophagy pathway of protein degradation use to identify proteins for destruction? a)The amino acid sequence KFERQ b)HSP90 c)The presence of ubiquitin groups d)The amino acid sequence PESTarrow_forwardExplain the signifi cance of the observation that peptides such as fMet-Leu-Phe “activate” the phagocytotic (particle-engulfi ng) functions of mammalian leukocytes (white blood cells).arrow_forwardDescribe in detail how a tryptophan attenuator iscontrolledarrow_forward
- Explain the answerarrow_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_forwardA cytokine/growth factor that induces inflammation and promotes cell death. a) Cdk1 Ob) TNF O c) none of these applyarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Anaerobic Respiration; Author: Bozeman Science;https://www.youtube.com/watch?v=cDC29iBxb3w;License: Standard YouTube License, CC-BY