Rhizobium lives as an aerobic microbe under free living conditions but gets adapted to anaerobic conditions during nitrogen fixation.

True

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False

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Solution

The correct option is A
True

Rhizobium is a free-living aerobic soil bacterium and cannot fix nitrogen independently. When it enters into roots of legumes, it can fix nitrogen by adapting to the anaerobic conditions.

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Q. which of these is a free living aerobic and anaerobic nitrogen-fixing bacteria respectively?

Q. Match the columns.

(a)	Nitrobacter	(i)	Free living aerobic nitrogen fixer
(b)	Clostridium	(ii)	Converts ammonia into nitrite
(c)	Nitrosococcus	(iii)	Changes nitrite to nitrate
(d)	Azotobacter	(iv)	Free living anaerobic nitrogen fixer

Q. Match the following.

(A) Nitrobacter	(i) Free living aerobic nitrogen fixing organism
(B) Clostridium	(ii) Converts nitrite to nitrates
(C) Nitrosococcus	(iii) Converts ammonia to nitrite
(D) Azotobacter	(iv) Free living anaerobic nitrogen fixing organism

The energy yield in terms of ATP is higher in aerobic respiration than during anaerobic respiration. Why is there anaerobic respiration even in organisms that live in aerobic condition like human beings and angiosperms?

Rhizobium lives as an aerobic microbe under free living conditions but gets adapted to anaerobic conditions during nitrogen fixation.

The correct option is A True Rhizobium is a free-living aerobic soil bacterium and cannot fix nitrogen independently. When it enters into roots of legumes, it can fix nitrogen by adapting to the anaerobic conditions.

The correct option is A
True

Rhizobium is a free-living aerobic soil bacterium and cannot fix nitrogen independently. When it enters into roots of legumes, it can fix nitrogen by adapting to the anaerobic conditions.