Microbiology of Soils – Section 1

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  • / Author: GkFeed Team

41. The diagnostic enzyme for nitrogen-fixing organisms is

A. nitrogenase
B. nitrate reductase
C. nitrate oxidase
D. none of these

Correct Answer: A. nitrogenase

42. Which of the following fungi on infecting crop roots can improve their uptake of phosphorus and other nutrients?

A. Saccharomyces cerevisiae
B. VA Mycorrhiza
C. Candida torulopsis
D. Aspergillus niger

Correct Answer: B. VA Mycorrhiza

43. Syntrophism involves

A. exchange of nutrients between two species
B. exchange of nutrients among species
C. no exchange of nutrients between two species
D. no exchange of nutrients among species

Correct Answer: A. exchange of nutrients between two species

44. Assimilative denitrification is done by

A. plants
B. fungi
C. prokaryotes
D. all of these

Correct Answer: D. all of these
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