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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What is Photobleaching?
A.When the fluorescence of a fluorophore becomes whiter due to too much light exposure.
B.When a fluorophore does not emit fluorescence because it transmits the excitation energy to a fluorophore located very close.
C.The decrease in the fluorescence intensity of a molecule in the presence of heavy metals.
D.The irreversible loss of fluorescence of a molecule.
Why can phototrophic green bacteria grow at light intensitiesthat will not support purple bacteria?
Name the photoreceptor pigment found in halophile bacteria.
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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- If a leaf containing the sameconcentration of chlorophyll as in the solution wasexposed to the same ultraviolet light, no fluorescencewould be seen. Propose an explanation for thedifference in fluorescence emission between thesolution and the leaf.arrow_forwardHow many photons are produced on average by the bacteria Vibrio Campellii, dinoflagellates and luciferin? Which one would emit the most light and by how much is the difference in photons?arrow_forward. List the parts of the light reactions that are proteins. List the parts of the light reactions that are not proteins. This question is in reference to photosynthesis.arrow_forward
- Why do the reaction centers have different pigments rather than only the chlorophyls? quantitatively increasing the absorption photons narrowing coverage of the visible spectrum light increasing coverage of the visible spectrum light arranging light-harvesting complexe compensating for the high density of chlorophyllarrow_forwardExplain why the arrangements of pigments in the chlorosome an efficient way of absorbing light at low intensities?arrow_forwardDescribe the role of chlorophylls, bacteriochlorophylls, accessory pigments, reaction-center pigments, and antennae pigments in capturing radiant energy.arrow_forward
- Explain why many molecules that demonstrate significant absorption in the UV/Vis do not also fluoresce.arrow_forwardMany pelagic Bacteria can use light energy but arenot considered “phototrophs” in the same sense ascyanobacteria or purple bacteria. Explain.arrow_forwardWhich color(s) of light does chlorophyll a reflect? a. red and blue b. green c. red d. bluearrow_forward
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