1. Whereas Thiospirillum would ___________, Pelodictyon would __________. a. be
ID: 15973 • Letter: 1
Question
1. Whereas Thiospirillum would ___________, Pelodictyon would __________.a. be found in region c of the Winogradsky column, be found in region b of the
Winogradsky column
b. be found in Volume 2 of Bergey’s Manual of Systematic Bacteriology, be found
in Volume 1 of Bergey’s Manual of Systematic Bacteriology
c. contain internal sulfur storage granules, form sulfur storage granules outside the
cell.
d. All of the above
e. A and C
2-The purple nonsulfur bacterium Rhodospeudomonas generally lives
photoheterotrophically in the Winogradsky column. Trent is interested in the resilience of this bacterium and so he take the “time share” Winogradsky column home, agitates it thoroughly and leaves it for several weeks in a dark room. What happens to Rhodospeudomonas?
a. The cells die because they lack an energy source.
b. The cells become colorless and live chemoheterotrophically.
c. The cells form endospores.
d. The cells begin to employ anaerobic respiration.
3-Just then, Nikki and Jeslyn spy some tourists who have arrived at lower geyser basin in a snow coach. Some of the tourists have jumped out and begun drawing in the microbial matt with sticks. Nikkie and Jeslyn decide to educate these tourists about the microbial composition of the area. All of the following are things that they might tell the tourists EXCEPT
a. Certain microoroganisms in this area produce enzymes that enable amplification
of DNA.
b. Some of the bacteria in this area are capable of converting N2 gas to ammonia.
c. Some of the bacteria in this area may form resting structures that are resistant to
desiccation.
d. Many of the bacteria in this area are oxygenic phototrophs and thus they provide
the O2 that we need in order to breath.
e. The bacteria that comprise this matt are in the genus Nitrosomonas and they are
nitrite oxidizers.
4. While Nikki and Jeslyn are talking with the tourists, Kyle and Aaron seize the moment to take a small sample of the microbial matt from the stick the tourists were using. They know they will be able to isolate the enzyme nitrogenase from this sample. Nitrogenase
a. would be most active in oxygenic phototrophs when photosystem II is being used.
b. would be more active in Nostoc heterocysts than in other cells of a trichome.
c. would be more active in cells in the upper 1/8th inch of the microbial mat in
Yellowstone’s upper and lower geyser basin.
d. synthesizes starch in akinetes.
5. Rather than traveling to snowy Yellowstone, Kristina, Courtney and Sarah N. have
decided to travel to the Utah Canyonlands to observe the cryptobiotic crust. In Arches
National Monument, they see some tourists “busting the crust”. They stop the tourists and explain that all of the following are important functions of the crust EXCEPT
a. “The anoxygenic phototrophs within this cryptobiotic crust consume toxic gases
(such as H2S) from our atmosphere thus reducing environmental pollution.”
b. “When it rains, the cyanobacteria in that crust swell and take on water which
benefits everything in the soil.”
c. “The cryptobiotic crust (that you just stepped on) prevents erosion.”
d. “The cyanobacteria within this crust “fix” nitrogen thus forming forms of nitrogen
upon which all life depends.”
Explanation / Answer
1. Whereas Thiospirillum would ___________, Pelodictyon would __________.
a. be found in region c of the Winogradsky column, be found in region b of the
Winogradsky column
b. be found in Volume 2 of Bergey’s Manual of Systematic Bacteriology, be found
in Volume 1 of Bergey’s Manual of Systematic Bacteriology
c. contain internal sulfur storage granules, form sulfur storage granules outside the
cell.
d. All of the above
e. A and C
2-The purple nonsulfur bacterium Rhodospeudomonas generally lives
photoheterotrophically in the Winogradsky column. Trent is interested in the resilience of this bacterium and so he take the “time share” Winogradsky column home, agitates it thoroughly and leaves it for several weeks in a dark room. What happens to Rhodospeudomonas?
a. The cells die because they lack an energy source.
b. The cells become colorless and live chemoheterotrophically.
c. The cells form endospores.
d. The cells begin to employ anaerobic respiration.
3-Just then, Nikki and Jeslyn spy some tourists who have arrived at lower geyser basin in a snow coach. Some of the tourists have jumped out and begun drawing in the microbial matt with sticks. Nikkie and Jeslyn decide to educate these tourists about the microbial composition of the area. All of the following are things that they might tell the tourists EXCEPT
a. Certain microoroganisms in this area produce enzymes that enable amplification
of DNA.
b. Some of the bacteria in this area are capable of converting N2 gas to ammonia.
c. Some of the bacteria in this area may form resting structures that are resistant to
desiccation.
d. Many of the bacteria in this area are oxygenic phototrophs and thus they provide
the O2 that we need in order to breath.
e. The bacteria that comprise this matt are in the genus Nitrosomonas and they are
nitrite oxidizers.
4. While Nikki and Jeslyn are talking with the tourists, Kyle and Aaron seize the moment to take a small sample of the microbial matt from the stick the tourists were using. They know they will be able to isolate the enzyme nitrogenase from this sample. Nitrogenase
a. would be most active in oxygenic phototrophs when photosystem II is being used.
b. would be more active in Nostoc heterocysts than in other cells of a trichome.
c. would be more active in cells in the upper 1/8th inch of the microbial mat in
Yellowstone’s upper and lower geyser basin.
d. synthesizes starch in akinetes.
5. Rather than traveling to snowy Yellowstone, Kristina, Courtney and Sarah N. have
decided to travel to the Utah Canyonlands to observe the cryptobiotic crust. In Arches
National Monument, they see some tourists “busting the crust”. They stop the tourists and explain that all of the following are important functions of the crust EXCEPT
a. “The anoxygenic phototrophs within this cryptobiotic crust consume toxic gases
(such as H2S) from our atmosphere thus reducing environmental pollution.”
b. “When it rains, the cyanobacteria in that crust swell and take on water which
benefits everything in the soil.”
c. “The cryptobiotic crust (that you just stepped on) prevents erosion.”
d. “The cyanobacteria within this crust “fix” nitrogen thus forming forms of nitrogen
upon which all life depends.”
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