Brock Biology of Microorganisms (14th Edition)
14th Edition
ISBN: 9780321897398
Author: Michael T. Madigan, John M. Martinko, Kelly S. Bender, Daniel H. Buckley, David A. Stahl, Thomas Brock
Publisher: PEARSON
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Chapter 14.24, Problem 1MQ
Summary Introduction
The production as well as the emission of visible light by living organisms is known as bioluminescence. This process can be observed in certain
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Name the photoreceptor pigment found in halophile bacteria.
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capturing orange-red light, and allophycocyanin-responsible for capturing red light.
Since light can only penetrate to certain depths in oceans, phycobiliproteins capture the
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7.5m
UV
15.0m
22.5m
30.0m.
37.5m
Blue
Green
Red
O Tomemorris 2020
Creative Commons Attribution-Share Alike 4.0 International license.
IR
25ft
50ft
75ft
100ft
125ft
a. Explain the relationship between chlorophyll absorption and wavelength.
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Chapter 14 Solutions
Brock Biology of Microorganisms (14th Edition)
Ch. 14.1 - Why is it necessary to consider microbial...Ch. 14.1 - What are three reasons that functional traits...Ch. 14.2 - What form of photosynthesis was most likely the...Ch. 14.3 - What are the differentiating properties of the...Ch. 14.3 - Prob. 2MQCh. 14.4 - What is the source of the purple color from which...Ch. 14.4 - Prob. 2MQCh. 14.5 - What are some similarities between purple...Ch. 14.5 - Prob. 2MQCh. 14.6 - Prob. 1MQ
Ch. 14.6 - Prob. 2MQCh. 14.7 - Prob. 1MQCh. 14.7 - Prob. 2MQCh. 14.8 - What types of anoxygenic phototrophs contain...Ch. 14.8 - Prob. 2MQCh. 14.9 - What are the typical electron donors used by...Ch. 14.9 - What bacterial phyla are known to contain...Ch. 14.10 - What are the typical electron donors used by...Ch. 14.10 - Prob. 2MQCh. 14.11 - Describe the energy and carbon metabolism of...Ch. 14.11 - What are some ecological strategies that sulfur...Ch. 14.12 - What mechanisms do free-living diazotraphs use to...Ch. 14.12 - Prob. 2MQCh. 14.13 - Under what conditions would you expect...Ch. 14.13 - Prob. 2MQCh. 14.14 - In what phylogenetic groups are Geobacter and...Ch. 14.14 - Prob. 2MQCh. 14.15 - What habitat characteristics govern the diversity...Ch. 14.15 - How do aerobic neutrophilic iron-oxidizers keep...Ch. 14.16 - Prob. 1MQCh. 14.16 - Prob. 2MQCh. 14.17 - What is the difference between a methanotroph and...Ch. 14.17 - What is unique about the methanotroph...Ch. 14.18 - Prob. 1MQCh. 14.18 - Prob. 2MQCh. 14.19 - Prob. 1MQCh. 14.19 - What are the different ways in which species of...Ch. 14.20 - What are the major differences between spirochetes...Ch. 14.20 - Name two diseases of humans caused by spirochetes.Ch. 14.21 - Prob. 1MQCh. 14.21 - Prob. 2MQCh. 14.22 - Describe how a sheathed bacterium such as...Ch. 14.22 - List two metals that are oxidized by sheathed...Ch. 14.23 - What benefit do magnetic bacteria accrue from...Ch. 14.23 - Would you expect to find greigite or magnetite in...Ch. 14.24 - Prob. 1MQCh. 14.24 - Prob. 2MQCh. 14 - What is convergent evolution and how is it...Ch. 14 - Which bacterial phyla contain phototrophs?Ch. 14 - How are prochlorophytes, such as Prochlorococcus,...Ch. 14 - Compare and contrast the metabolism, morphology,...Ch. 14 - Compare and contrast the metabolism of purple...Ch. 14 - REVIEW QUESTIONS
6. In what group of organisms...Ch. 14 - Prob. 7RQCh. 14 - In what ways is Chloracidobacterium thermophilum...Ch. 14 - Prob. 9RQCh. 14 - In what ways are sulfur-reducing bacteria...Ch. 14 - Prob. 11RQCh. 14 - What are some ways that diazotrophs protect...Ch. 14 - Prob. 13RQCh. 14 - Prob. 14RQCh. 14 - Prob. 15RQCh. 14 - Prob. 16RQCh. 14 - Prob. 17RQCh. 14 - What are the differences between type I and type...Ch. 14 - Prob. 19RQCh. 14 - Compare and contrast the life cycle of Myxococcus...Ch. 14 - Contrast the motility of spirochetes with that of...Ch. 14 - Contrast the life cycle of Hyphomicrobium with...Ch. 14 - Prob. 23RQCh. 14 - In what way does a magnetosome contribute to the...Ch. 14 - Prob. 25RQCh. 14 - Describe a key physiological feature of the...Ch. 14 - APPLICATION QUESTIONS
2. Describe the metabolism...
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- To assess photosynthesis, we relied heavily on a spectrophotometer to measure the color intensity of DCPIP in our solution. We set the spectrophotometer at wavelengths in the visible spectrum. What is the approximate wavelength range (in nm) for the visible spectrum? For example, the ultraviolet spectrum wavelength range is approximately 10-400 nmarrow_forwardWhat exactly happens when chlorophyll and other pigments absorb light?arrow_forwardName the special photoreceptor pigment present in halophiles.arrow_forward
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- Phycobiliproteins are complex proteins in cyanobacteria that absorb light energy. There are three different kinds of phycobiliprotein molecules used to pass light to chlorophyll: phycoerythrin is responsible for capturing green light, phycocyanin is responsible for capturing orange-red light, and allophycocyanin is responsible for capturing red light.Since light can only penetrate to certain depths in oceans, phycobiliproteins capture the light available and pass it through various pathways of phycobiliproteins until the emitted light is red, which is absorbed by chlorophyll. Use the figure below to answer the following questions. (View image attached) 1. Justify the claim that photosynthetic organisms that live more than 75 feet below the surface of the ocean need phycoerythrin to survive. Provide reasoning that explains this claim.arrow_forwardPhycobiliproteins are complex proteins in cyanobacteria that absorb light energy. There are three different kinds of phycobiliprotein molecules used to pass light to chlorophyll: phycoerythrin is responsible for capturing green light, phycocyanin is responsible for capturing orange-red light, and allophycocyanin is responsible for capturing red light. Since light can only penetrate to certain depths in oceans, phycobiliproteins capture the light available and pass it through various pathways of phycobiliproteins until the emitted light is red, which is absorbed by chlorophyll. Use the figure below to answer the following questions. 7.5m UV 15.0m 22.5m 30.0m 37.5m Blue Green Red © Tomemorris 2020 Creative Commons Attribution-Share Alike 4.0 International license. IR 25ft 50ft 75ft 100ft 125ft a. Explain the relationship between chlorophyll absorption and wavelength. b. Justify the claim that photosynthetic organisms that live more than 75 feet below the surface of the ocean need…arrow_forwardAt your work station, you have a spectrophotometer set at 600 nm to measure DCIP absorbance and four (4) test tubes containing different solutions. One of the test tubes is labelled “0” to blank/zero the spectrophotometer. The other three (3) test tubes contain a reaction mixture from a Hill reaction experiment using isolated chloroplasts and DCIP as an electron acceptor. DCIP is present in the oxidized state and exhibits a blue color with an absorbance at 600 nm. Upon receiving the electrons, DCIP is reduced to form DCIP-H2 that is colorless. These three (3) tubes, labelled “A”, “B”, and “C” were exposed to different light conditions during the Hill reaction. The Light conditions were random, including No light, Red light, and Green light. Please note that chlorophyll preferentially absorbs the light with wavelength of 660 nm (red) when compared to that of 520 nm (green). Your mission is to determine which Tube came from which experimental light condition. Tube: Tube…arrow_forward
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