What type of reactions take place in the portion of the sulfur cycle indicated in the figure?
A) oxidation-reduction
B) fermentation
C) dissimilation
D) denitrification
E) carbon fixation

Question

What type of reactions take place in the portion of the sulfur cycle indicated in the figure?
A) oxidation-reduction 
B) fermentation 
C) dissimilation 
D) denitrification 
E) carbon fixation

Quizplus · Accepted Answer

The portion of the sulfur cycle indicated in the figure involves the conversion of sulfate (SO42-) to hydrogen sulfide (H2S) by sulfate-reducing bacteria. This is an example of an oxidation-reduction reaction, as electrons are transferred from sulfate to hydrogen to produce H2S.

What Type of Reactions Take Place in the Portion of the Sulfur