EBK BROCK BIOLOGY OF MICROORGANISMS
15th Edition
ISBN: 8220103633352
Author: Stahl
Publisher: PEARSON
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Textbook Question
Chapter 14.16, Problem 1CR
Compare and contrast acetogens with methanogens in terms of (1) substrates and products of their energy
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Which of the following proteins or protein complexes is directly required for the targeting of mitochondrial inner membrane multipass proteins, such as metabolite transporters, whose
signal sequence is normally not cleaved after import?
OA. TIM22
OB. TIM23
C. OXA
OD. Mia40
OE SAM
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.
C. both a GPCR and an RGS can act as a GEF.
O D. both a GPCR and an RGS can act as a GAP
OE. None of the above.
Chapter 14 Solutions
EBK BROCK BIOLOGY OF MICROORGANISMS
Ch. 14.1 - What is the fundamental difference between an...Ch. 14.1 - What is the purpose of chlorophyll and...Ch. 14.1 - Why can phototrophic green bacteria grow at light...Ch. 14.1 - What are the functions of light-harvesting and...Ch. 14.2 - In which phototrophs are carotenoids found?...Ch. 14.2 - How does the structure of a phycobilin compare...Ch. 14.2 - Phycocyanin is blue-green. What color of light...Ch. 14.2 - What accessory pigments are present in...Ch. 14.3 - What parallels exist in the processes of...Ch. 14.3 - What is reverse electron flow and why is it...
Ch. 14.3 - What is the difference between cyclic and...Ch. 14.3 - What is reverse electron transport and why is it...Ch. 14.4 - Differentiate between cyclic and noncyclic...Ch. 14.4 - What is the key role of light energy in the...Ch. 14.4 - What evidence is there that anoxygenic and...Ch. 14.4 - Prob. 1CRCh. 14.5 - Prob. 1MQCh. 14.5 - How much NADPH and ATP is required to make one...Ch. 14.5 - Contrast autotrophy in the following phototrophs:...Ch. 14.5 - QWhat is a carboxysome, and what is its role in...Ch. 14.6 - Prob. 1MQCh. 14.6 - What is FeMo-co and what does it do?Ch. 14.6 - How is acetylene useful in studies of nitrogen...Ch. 14.6 - How might the ability to fix nitrogen help a...Ch. 14.7 - In a coupled reaction, how can you tell the...Ch. 14.7 - How does aerobic respiration differ from anaerobic...Ch. 14.7 - Describe the major differences between...Ch. 14.7 - Prob. 1CRCh. 14.8 - What enzyme is required for hydrogen bacteria to...Ch. 14.8 - Why is reverse electron flow unnecessary in H2...Ch. 14.8 - QWhich inorganic electron donors are used by the...Ch. 14.9 - Prob. 1MQCh. 14.9 - In terms of intermediates, how does the Sox system...Ch. 14.9 - Prob. 1CRCh. 14.10 - Prob. 1MQCh. 14.10 - What is the function of rusticyanin and where is...Ch. 14.10 - How can Fe2+ be oxidized under anoxic conditions?Ch. 14.10 - Prob. 1CRCh. 14.11 - Prob. 1MQCh. 14.11 - Prob. 2MQCh. 14.11 - Prob. 1CRCh. 14.12 - What are the electron donor and acceptor in the...Ch. 14.12 - What does electron transport in anammox bacteria...Ch. 14.12 - Compare CO2 fixation in anammox bacteria and...Ch. 14.12 - Prob. 1CRCh. 14.13 - For Escherichia coli, why is more energy released...Ch. 14.13 - How do the products of NO3 reduction differ...Ch. 14.13 - Where is the dissimilative nitrate reductase found...Ch. 14.13 - Prob. 1CRCh. 14.14 - How is SO42 converted to SO32 during dissimilative...Ch. 14.14 - Contrast the growth of Desulfovibrio on H2 versus...Ch. 14.14 - Give an example of sulfur disproportionation.Ch. 14.14 - Prob. 1CRCh. 14.15 - Prob. 1MQCh. 14.15 - What is reductive dechlorination and why is it...Ch. 14.15 - How does anaerobic glucose catabolism differ in...Ch. 14.15 - Compare and contrast ferric iron reduction with...Ch. 14.16 - What is the purpose of CO dehydrogenase?Ch. 14.16 - If acetogens conserve energy using the Rnf...Ch. 14.16 - What is electron bifurcation and what role does it...Ch. 14.16 - Compare and contrast acetogens with methanogens in...Ch. 14.17 - Which coenzymes function as C1 carriers in...Ch. 14.17 - In methanogens growing on H2 + CO2, how is carbon...Ch. 14.17 - How is ATP made in methanogenesis when the...Ch. 14.17 - What are the major differences in the conservation...Ch. 14.18 - When using CH4 as electron donor, why is...Ch. 14.18 - In which two ways does the ribulose monophosphate...Ch. 14.18 - What is unique about methanotrophy in...Ch. 14.18 - Prob. 1CRCh. 14.19 - Why is H2 produced during many types of...Ch. 14.19 - Why is acetate formation in fermentation...Ch. 14.19 - Define the term substrate-level phosphorylation:...Ch. 14.20 - How can homo- and heterofermentative metabolism be...Ch. 14.20 - Butanediol production leads to greater ethanol...Ch. 14.20 - QWhat are the major fermentation products of...Ch. 14.21 - Compare the mechanisms for energy conservation in...Ch. 14.21 - What type of substrates are fermented by...Ch. 14.21 - What are the substrates for the Clostridium...Ch. 14.21 - Prob. 1CRCh. 14.22 - Why does Propionigenium modestum require sodium...Ch. 14.22 - Of what benefit is the organism Oxalobacter to...Ch. 14.22 - Prob. 3MQCh. 14.22 - Give an example of a fermentation that does not...Ch. 14.23 - Give an example of interspecies H2 transfer. Why...Ch. 14.23 - Why can a pure culture of Syntrophomonas grow on...Ch. 14.23 - Why is syntrophy also called interspecies H2...Ch. 14.24 - How do monooxygenases differ in function from...Ch. 14.24 - What is the final product of catabolism of a...Ch. 14.24 - Prob. 3MQCh. 14.24 - How do monooxygenases differ from dioxygenases in...Ch. 14.25 - What is the benzoyl-CoA pathway, and how might it...Ch. 14.25 - How is hexane oxygenated during anoxic catabolism?Ch. 14.25 - Prob. 1CRCh. 14 - The growth rate of the phototrophic purple...Ch. 14 - Prob. 2AQCh. 14 - A fatty acid such as butyrate cannot be fermented...Ch. 14 - When methane is made from CO2 (plus H2) or from...
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- A cell expresses a transmembrane protein that is cleaved at the plasma membrane to release an extracellular fragment. The fragment binds to receptor proteins on nearby cells and activates signaling pathways resulting in altered gene expression patterns in the cells. What form of intercellular signaling does this represent? OA. Contact-dependent signaling B. Paracrine signaling OC. Synaptic signaling D. Endocrine signaling E. Autocrine signalingarrow_forwardWhich of the following drive nuclearly encoded proteins import into the mitochondrial matrix? OA. ATP hydrolysis OB. Membrane Potential OC. K+ Ions OD. A and B OE. None of the abovearrow_forwardWhich of the following statements is true regarding Cholesterol import into the cell? OA. It is transported within LDL B. Receptor mediated endocytosis is involved OC. Release of cholesterol occurs in the Lysosome D. All of the above are true statements OE. None of the above are true statementsarrow_forward
- 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
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