Microbiology of Soils

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Microbiology of Soils

Question 1 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Denitrification is carried out
A
usually by facultative anaerobes
B
predominantly by Pseudomonas spp
C
predominantly by Bacillus spp
D
all of the above
Question 2 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The energy value of biogas is typically
A
400-700 BTU/ft$^{3}$
B
1, 000 BTU/ft$^{3}$
C
1500 BTU/ft$^{3}$
D
more than 5000 BTU/ft$^{3}$
Question 3 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following species of different genera of bacteria are not capable of transforming nitrate to nitrogen?
A
Achromobacter
B
Agrobacterium
C
Alcaligenes
D
None of these
Question 4 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The organisms responsible for the characteristic musty or earth odor of a freshly plowed field is/are
A
Nocardia
B
Streptomyces
C
Micromonospora
D
all of these
Question 5 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Nitrogen oxidation (nitrification)refers to the
A
conversion of ammonium ions into nitrates through the activities of certain bacteria.
B
changing of atmospheric nitrogen (N$_{2}$) to nitrogen compounds
C
sulfur is oxidized to the sulfate form through Thiobacillus bacteria
D
none of the above
There are 5 questions to complete.