Describe the similarities and differences observed among phototrophic bacteria
What will be an ideal response?
All major groups of bacteria contain phototrophic bacteria, which includes the cyanobacteria and the green and purple phototrophic bacteria. All phototrophic bacteria are structurally similar in that they use photosynthetic lamellae that contain the photosynthetic pigments necessary for photosynthesis. However, the type of photosynthetic pigment used differs among these groups. For example, cyanobacteria contain chlorophyll a, whereas the green and purple photosynthetic bacteria use bacteriochlorophyll. The type of photosynthesis differs as well: cyanobacteria engage in oxygenic photosynthesis, whereas the green and purple bacteria are anoxygenic. Finally, most phototrophic bacteria are autotrophic, although they differ in the ways they obtain electrons for the reduction of CO2; most notably, the sulfur bacteria oxidize hydrogen sulfide to obtain electrons for CO2 reduction.
Bloom's Taxonomy: Application
Section: Survey of Bacteria
Learning Outcome: 11.12
You might also like to view...
Drugs that are HIV protease inhibitors
A. prevent HIV protease from degrading host cell proteins. B. block the translation of HIV proteases. C. bind to HIV proteases. D. prevent HIV proteases from breaking apart capsid proteins. E. bind to HIV proteases and prevent the proteases from breaking apart capsid proteins.
Each of these regions, which can be found on a multitude of different continents, is an
example of a __________.
a. disturbance b. life zone c. habitat d. niche
Which of the following best describes the opening and closing of the stomata in most plants?
A) They are open during the day and closed at night. B) They are open at night and closed during the day. C) They are open almost all of the time. D) They are closed except for brief periods of time during the day.
Acetyl can be a substrate for a number of different reactions involving different enzymes and resulting in different products. This situation can be described as
A. enzymatic inhibition. B. negative-feedback inhibition. C. substrate competition. D. enzymatic competition.