Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Textbook Question
Chapter 21.4, Problem 1.3CC
Compare the capacity of green nonsulfur (Chloroflexi) and green sulfur bacteria (Chlorobi) to position themselves in light of optimum wavelength.
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A bacterial cell moving toward light would be an example of
O 1) negative chemotaxis.
O 2) negative phototaxis.
3) positive chemotaxis.
O 4) positive phototaxis.
5) photoequilibrium
The figure shows stratification of microbial layers in a Winogradsky column (a method used to simulate environments
similar to microbial mats observed in nature).
Cyanobacteria
and algae
Nonsulfur
photosynthetic
bacteria
(e.g., Rhodomicrobium)
Purple
photosynthetic
bacteria
(e.g., Chromatium)
Green
photosynthetic
bacteria
(e.g., Chlorobium)
Air
Liquid
Aerobic zone
Microaerophilic zone
(Less anaerobic)
Anaerobic zone
(More anaerobic)
Mud mixed with
sulfate and carbonate
salts and cellulose or
other organics
Mention and explain at least one reason why you might obtain growth of bacteria on EMB that was
supposed to appear green but it resulted in pink color?
Chapter 21 Solutions
Prescott's Microbiology
Ch. 21.3 - In what ways are members of Aquifex and Thermotoga...Ch. 21.3 - Prob. 2CCCh. 21.3 - Design an experiment designed to explore the role...Ch. 21.3 - Explain the relationship between genome size and...Ch. 21.4 - Which of the phototrophs discussed perform...Ch. 21.4 - Prob. 1.2CCCh. 21.4 - Compare the capacity of green nonsulfur...Ch. 21.4 - Why do you think NH3 is converted to the amino...Ch. 21.4 - Prob. 2.1CCCh. 21.4 - Prob. 2.2CC
Ch. 21.4 - Prob. 2.3CCCh. 21.4 - Describe how a vegetative cell, a heterocyst, and...Ch. 21.4 - Prob. 2.5CCCh. 21.4 - Prob. 2.6CCCh. 21.5 - Prob. 1MICh. 21.5 - Prob. 2MICh. 21.5 - Prob. 1CCCh. 21.5 - Prob. 2CCCh. 21.5 - What might have been some of the culture...Ch. 21.5 - Prob. 4CCCh. 21.5 - Prob. 5CCCh. 21.7 - Prob. 1MICh. 21.8 - Prob. 1CCCh. 21.8 - Prob. 2CCCh. 21.8 - Prob. 3CCCh. 21.8 - Why are cytophagas ecologically important?Ch. 21.8 - Prob. 5CCCh. 21 - Prob. 1RCCh. 21 - Prob. 2RCCh. 21 - Prob. 3RCCh. 21 - Prob. 4RCCh. 21 - Prob. 5RCCh. 21 - Prob. 6RCCh. 21 - Prob. 7RCCh. 21 - The cyanobacterium Anabaena grows well in liquid...Ch. 21 - Compare the structural and functional differences...Ch. 21 - Prob. 3ALCh. 21 - Prob. 4ALCh. 21 - Prob. 5AL
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