BIOLOGY IN HUMAN WELFARE
MICROBES IN HUMAN WELFARE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A, C, D
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A, B, C, D
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B, C, D
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A, B, C
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Detailed explanation-1: -The Rhizobium or Bradyrhizobium bacteria colonize the host plant’s root system and cause the roots to form nodules to house the bacteria (Figure 4). The bacteria then begin to fix the nitrogen required by the plant.
Detailed explanation-2: -Rhizobium is a bacteria present as a symbiotic association in the root nodules of the leguminous plants. The nitrogen fixed by the bacteria is utilized by the plant and in turn, Rhizobium receives nourishment from the plant.
Detailed explanation-3: -Here, we demonstrate that a nifS-like gene also occurs in Lactobacillus bulgaricus, an organism which does not fix nitrogen, and that the nifS gene product suppresses the leucine auxotrophy of an ilvD, ilvE Escherichia coli strain.
Detailed explanation-4: -Legumes are able to form a symbiotic relationship with nitrogen-fixing soil bacteria called rhizobia. The result of this symbiosis is to form nodules on the plant root, within which the bacteria can convert atmospheric nitrogen into ammonia that can be used by the plant.