The Carbon Cycle & Sulphur Cycle

 

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The Carbon Cycle & Sulphur Cycle

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Question 1
Sulphates are reduced to hydrogen sulphide by .....
A
Desulfotomaculum sp.
B
Thiobacillus thiooxidans
C
Photosynthetic sulfur bacteria
D
Rhodospirillum


Question 2
Fresh air contains approximately ..... percent carbon dioxide by volume.
A
0.01
B
2
C
5
D
0.03


Question 3
Cellobiose is metabolized directly by many microorganisms.
A
True
B
False


Question 4
Which among the following develop in the upper portion of the Winogradsky column?
A
Sulfate-reducing bacteria
B
Green-sulfur bacteria
C
Purple-sulfur bacteria
D
Thiobacilli


Question 5
Purple and green sulfur bacteria use ..... as the electron donor to reduce carbon dioxide.
A
S2-
B
SO42-
C
H2S
D
Organic acids


There are 5 questions to complete.

 

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