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
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Chapter 25.5, Problem 2MQ
Summary Introduction
Coagulase and streptokinase are the virulence factors released by Staphylococcus aureus and Streptococcus pyogenes respectively. Coagulase helps in the process of clot formation thereby protecting the colony of S. aureus cells from the host immune response. Streptokinase helps in dissolving the clot for the further spread and growth of the micro-organism.
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QUESTION 9
An animal cell has been wounded and has a small rupture in its plasma membrane. Which of the following is more likely to happen next?
OA. The cell rapidly cleaves by cytokinesis.
OB. The rate of receptor-mediati endocytosis is increased.
OC. The rate of exocytosis is increased.
OD. The rate of pinocytosis is increased.
For the a subunit of a trimeric G protein,
A. a G-protein-coupled receptor GPCR) acts as a guanine nucleotide exchange factor (GEF), whereas a regulator of G protein signaling (RGS) can act as a GTPase-activating protein
(GAP).
B. a GPCR acts as a GAP, whereas an RGS can act as a GEF.
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OE. None of the above.
Chapter 25 Solutions
Brock Biology of Microorganisms (15th Edition)
Ch. 25.1 - What event is required but not sufficient to cause...Ch. 25.1 - Prob. 2MQCh. 25.1 - Prob. 1CRCh. 25.2 - Prob. 1MQCh. 25.2 - Prob. 2MQCh. 25.2 - Prob. 3MQCh. 25.2 - Prob. 1CRCh. 25.3 - What are virulence factors? How can the LD50 test...Ch. 25.3 - Prob. 2MQCh. 25.3 - Prob. 1CR
Ch. 25.4 - Prob. 1MQCh. 25.4 - Prob. 2MQCh. 25.4 - Prob. 3MQCh. 25.4 - Prob. 1CRCh. 25.5 - Prob. 1MQCh. 25.5 - Prob. 2MQCh. 25.5 - Prob. 3MQCh. 25.5 - Prob. 1CRCh. 25.6 - What key features are shared by all AB exotoxins?Ch. 25.6 - Prob. 2MQCh. 25.6 - Prob. 3MQCh. 25.6 - Prob. 1CRCh. 25.7 - Prob. 1MQCh. 25.7 - Prob. 2MQCh. 25.7 - QDistinguish between the mechanism of cytotoxins...Ch. 25.8 - What part of the Escherichia coli cell contains...Ch. 25.8 - Why is it necessary to test for endotoxin in water...Ch. 25.8 - Prob. 1CRCh. 25 - Coagulase is a virulence factor for Staphylococcus...Ch. 25 - Although mutants incapable of producing exotoxins...
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- In which of the following schematic drawings of signaling pathways does the activation of the receptor lead to gene expression? Activating and inhibitory steps are indicated with (+) and (-), respectively. OA OB ㅇㅂㅇㅂㅇㅁ (+) Gene Expression Activated Signaling proteins Transcription receptor activator Bl D Gene Expression Gene Expression ㅁㅁㅇ Gene Expression Gene Expressionarrow_forwardWhich of the following events normally activates a GTP-binding protein? OA. GTP hydrolysis by the protein OB. Activation of an upstream GTPase-activating protein OC. Activation of an upstream guanine nucleotide exchange factor OD. Phosphorylation of a bound GDP molecule by an upstream phosphorylase OE. Pi release after GTP hydrolysisarrow_forwardProteins that are synthesized on the Rough ER are imported into the ER lumen after their signal sequence is recognized. Which of the following is responsible for the signal recognition? OA. Signal Recognition Particle, OB. Signal Sequence C. Stop-transfer sequence OD. Both B and C OE. None of the abovearrow_forward
- Stroma Light 4 H 4 H I Thylakoid- membran 2 H₂O D1 D2 Min Light 2,6 ATP 2 NADP+ 2 NADPH/H+ Fp 2,6 ADP +2,6 P 8 H+ 12 H+ 4 H+ Lumen PS II Cyt bef PS I ATP-Synthase 12345 5a 5b 6arrow_forwardWhich of the following statements is TRUE regarding the signal recognition particle (SRP)? OA. SRP is made up of RNA and Proteins B. SRP binds to the signal sequence OC. SRP binds to the elongation factor binding site on the ribosome and pauses translation D. All of the above are true statements OE. None of the above are true statementsarrow_forwardWhich of the following pathways does NOT directly deliver materials to lysosomes? OA. Endocytosis B. Exocytosis OC. Phagocytosis OD. Autophagy OE. Macropinocytosisarrow_forward
- You suspect a protein to be secreted out of a cell. What experiment would you perform to follow the movement of this protein through the secretory pathway? A. Pulse - Chase Experiment OB. Signal Sequence Deletion C. Signal Sequence Mutation OD. All of the above E. None of the abovearrow_forwardA schematic drawing of the secretory and endocytic pathways is presented below. Indicate which component in the drawing (A to J) corresponds to each of the following. Your answer would be a 10-letter string composed of letters A to J only, c.g. HICDJABFGE. nuclear envelope Early endosome Late endosome ER Lysosome A ( ) cis Golgi cisterna () modial Golgi cisterna () trans Golgi cisterna [] cis Golgi network (CGN) () trans Golgi network (TGN) () Secretory Vesicle B C D E CYTOSOL F G H plasma membranearrow_forwardWhich of the following guide transport vesicles to their target membrane? A. Rab monomeric GTPases B. Signal Sequence OC. Heat Shock Proteins OD. All of the above O E. None of the abovearrow_forward
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