Microbiology of Soils
Which of the following is capable of oxidizing sulfur to sulfates?

Rhodospirillum
Desulfotomaculum
Thiobacillus thiooxidans
Rhodomicrobium

ANSWER DOWNLOAD EXAMIANS APP

Microbiology of Soils
Nitrogen fixation by the microorganisms can be detected by adopting the approach of

All of these
demonstrating growth in a nitrogen free medium
measuring15N2 by mass spectrometer
cultivating the microorganisms in the presence of nitrogen labeled with isotropic nitrogen

ANSWER DOWNLOAD EXAMIANS APP

Microbiology of Soils
Syntrophism involves

no exchange of nutrients among species
no exchange of nutrients between two species
exchange of nutrients between two species
exchange of nutrients among species

ANSWER DOWNLOAD EXAMIANS APP

Microbiology of Soils
Nitrogen oxidation (nitrification)refers to the

None of these
sulfur is oxidized to the sulfate form through Thiobacillus bacteria
changing of atmospheric nitrogen (N2) to nitrogen compounds
conversion of ammonium ions into nitrates through the activities of certain bacteria.

ANSWER DOWNLOAD EXAMIANS APP