Homework Answers
Answer: Option A is
correct
Explanation:
Quorum sensing is a mechanism to detect and respond to cell density
by regulating specific gene expression.
The ligands of quorum sensing
signaling cascade are autoinducers.
These autoinducers molecules are secreted by the bacteria into the
environment and gradually increase in concentration as the
bacterial population increases.
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2. Which category of biomolecule serves as a ligand durig quorum sensing in bacteria? a. Autoinducer...
Bacteria in gingivitis use an Agr and a Hsl system for quorum sensing. a) How many...
Bacteria in gingivitis use an Agr and a Hsl system for quorum sensing. a) How many species can produce the signal in each system (Agr and Hsl)? b) How many species actually recognize the signal in each system? c) How many are in that space in each system? d) What are the species in each system? e) What is the signal telling them to do in each system?
Bacterial Quorum Sensing, Pathogenicity Islands, and Secretion Systems 1. Briefly describe how bacterial quorum sensing may...
Bacterial Quorum Sensing, Pathogenicity Islands, and Secretion Systems 1. Briefly describe how bacterial quorum sensing may play a role in pathogenicity by: a) Promoting initial colonization of a new host; b) Enabling the bacterium to persist within that host; and c) Allowing some of the bacteria to spread to a new location within a host or to a new host. 2. Briefly describe how the ability to produce a type 3 secretion system might play a role in a pathogen...
QUESTION 40 Which best describes bacterial quorum sensing? A system that allows bacteria to transfer virulence...
QUESTION 40 Which best describes bacterial quorum sensing? A system that allows bacteria to transfer virulence factors from one bacterium to another by horizontal gene transfer. A system that allows bacteria to sense their own population density by communicating with each other by way of secreted chemical factors and behaving as a population rather than as individual bacteria. A system that enables bacteria to directly injecting bacterial effector molecules into the cytoplasm of the host cell in order to alter...
What is quorum sensing? a.The hypothesis that "too clean. is detrimental" to human health b. When...
What is quorum sensing? a.The hypothesis that "too clean. is detrimental" to human health b. When a critical number of microorganisms is reached in a biofilm, and via electrochemical communication, cause organisms in the biofilm to express new phenotypic traits. c. Communication between cells d. The ability of microorganisms to sense its environment and move toward or away from different stimuli e. The expression of a new gene that leads to new physical characteristics
QUESTION 48 is the ability of bacteria to alter surface proteins on the cell wall. a....
QUESTION 48 is the ability of bacteria to alter surface proteins on the cell wall. a. Antigenic variation b. Phase variation c. Density expression d. Quorum sensing e. none of the above
I need help please Question 6 Enzymes increase reaction rates by Not yet answered Points out...
I need help please
Question 6 Enzymes increase reaction rates by Not yet answered Points out of 1.00 P Flag question Select one: a decreasing the activation energy requirement. b. converting anabolic reactions into catabolic reactions. c. adding energy to the substrate molecules. O d. adding ATP to the reaction. e, slowly oxidizing the reactants. Question 7 What term refers to a loss in the native shape of an enzyme, often caused by a change in temperature or pH? Not...
HER1 signaling is triggered by HER1 monomers each binding its ligand followed by homodimerization and autophosphorylation....
HER1 signaling is triggered by HER1 monomers each binding its ligand followed by homodimerization and autophosphorylation. How do HER2/HER3 heterodimers initiate signaling? A. Neither HER2 nor HER3 bind ligands, but can form heterodimers that activate HER2 kinase which then autophoshorylates. B. Neither HER2 nor HER3 bind ligands, but can form heterodimers that activate HER3 kinase which then autophoshorylates. C. HER2, but not HER3 binds its ligand, causing it heterodimerize with HER3. This activates HER3 kinase which then autophosphorylates. D. HER2...
A. B. C. D. E. F. Thank you receptors induce activation of adenlyate cyclase, which creates...
A. B. C. D. E. F. Thank you
receptors induce activation of adenlyate cyclase, which creates the second messenger(s) O G-Protein Coupled, CAMP O Tyrosine Kinase, CAMP OTyrosine Kinase, IP3 and DAG G-Protein Coupled, IP3 and DAG Which of the following is most likely to be activated by a small hydrophobic signal? OIntracellular receptor Receptor Tyrosine Kinase O G-Protein Coupled Receptor Ligand-Gated lon Channel Which of the following types of receptors require dimerization for activation? (Select any/all that apply) OLigand-gated...
QUESTION 4 Which of the following enzymes directly converts phosphorylaseb into the more active form, phosphorylase...
QUESTION 4 Which of the following enzymes directly converts phosphorylaseb into the more active form, phosphorylase a? A. CAMP-dependent protein kinase B. phosphorylase kinase C. protein kinase A D. adenylate kinase E phosphoprotein phosphatase The biotin prosthetic group of pyruvate carboxylase is covalently attached to a residue of the enzyme ? A. Vakine B. serine C. lysine D. arginine E. the biotin is attached non-covalently Which of the following serves as the energy source for the metabolic conversion of oxaloacetate...
open to look at all pictures Multiple Choice Which of the following are true of G...
open to look at all pictures
Multiple Choice Which of the following are true of G protein coupled receptors (GPCRs) A) peripheral membrane protein B) Activates G proteins on cytoplasmic side C) Receptors to lipid soluble hormones D) Binds ligands on cytoplasmic side Submit CASTILLO NAVA Invoice Soon Multiple Choice Which of the following are true of G proteins A) Are integral membrane proteins B) Works with G protein coupled receptors C) dimer D) On the exoplasmic side of membrane...
QUESTION 40 Which best describes bacterial quorum sensing? A system that allows bacteria to transfer virulence factors from one bacterium to another by horizontal gene transfer. A system that allows bacteria to sense their own population density by communicating with each other by way of secreted chemical factors and behaving as a population rather than as individual bacteria. A system that enables bacteria to directly injecting bacterial effector molecules into the cytoplasm of the host cell in order to alter...
QUESTION 48 is the ability of bacteria to alter surface proteins on the cell wall. a. Antigenic variation b. Phase variation c. Density expression d. Quorum sensing e. none of the above
I need help please
Question 6 Enzymes increase reaction rates by Not yet answered Points out of 1.00 P Flag question Select one: a decreasing the activation energy requirement. b. converting anabolic reactions into catabolic reactions. c. adding energy to the substrate molecules. O d. adding ATP to the reaction. e, slowly oxidizing the reactants. Question 7 What term refers to a loss in the native shape of an enzyme, often caused by a change in temperature or pH? Not...
A. B. C. D. E. F. Thank you
receptors induce activation of adenlyate cyclase, which creates the second messenger(s) O G-Protein Coupled, CAMP O Tyrosine Kinase, CAMP OTyrosine Kinase, IP3 and DAG G-Protein Coupled, IP3 and DAG Which of the following is most likely to be activated by a small hydrophobic signal? OIntracellular receptor Receptor Tyrosine Kinase O G-Protein Coupled Receptor Ligand-Gated lon Channel Which of the following types of receptors require dimerization for activation? (Select any/all that apply) OLigand-gated...
QUESTION 4 Which of the following enzymes directly converts phosphorylaseb into the more active form, phosphorylase a? A. CAMP-dependent protein kinase B. phosphorylase kinase C. protein kinase A D. adenylate kinase E phosphoprotein phosphatase The biotin prosthetic group of pyruvate carboxylase is covalently attached to a residue of the enzyme ? A. Vakine B. serine C. lysine D. arginine E. the biotin is attached non-covalently Which of the following serves as the energy source for the metabolic conversion of oxaloacetate...
open to look at all pictures
Multiple Choice Which of the following are true of G protein coupled receptors (GPCRs) A) peripheral membrane protein B) Activates G proteins on cytoplasmic side C) Receptors to lipid soluble hormones D) Binds ligands on cytoplasmic side Submit CASTILLO NAVA Invoice Soon Multiple Choice Which of the following are true of G proteins A) Are integral membrane proteins B) Works with G protein coupled receptors C) dimer D) On the exoplasmic side of membrane...
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