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Question
Nodules in the roots of leguminous plants contain:
Nodules in the roots of leguminous plants contain:
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Solution
The correct option is A Nitrogen-fixing bacteria
The correct answer is option A
Explanation for a correct answer :
- Nitrogen fixation: The process of conversion of inorganic, atmospheric nitrogen into organic, usable forms in the presence of the enzyme Nitrogenase is called nitrogen fixation.
- The nitrogen-fixing bacteria such as Rhizobium live in the nodules of luminous plants to fix the atmospheric nitrogen into usable forms such as nitrates and nitrites.
Explanation for incorrect answer :
Option B
Sulfur-fixing bacteria: In the sulfur cycle, no bacteria fix sulfur but it is reduced by sulfur-reducing bacteria such as Acidophilus and Acidobacillus ferrooxidans.
Option C
Potassium fixing bacteria: The potassium fixing bacteria is not present in legumes plants because no bacteria fix potassium but it is solubilized into the soluble form which the plants can utilize by Acidothiobacillus ferrooxidans and Bacillus mucilaginosus.
Final answer: The correct answer is option A.
Nitrogen-fixing bacteria
The correct answer is option A
Explanation for a correct answer :
- Nitrogen fixation: The process of conversion of inorganic, atmospheric nitrogen into organic, usable forms in the presence of the enzyme Nitrogenase is called nitrogen fixation.
- The nitrogen-fixing bacteria such as Rhizobium live in the nodules of luminous plants to fix the atmospheric nitrogen into usable forms such as nitrates and nitrites.
Explanation for incorrect answer :
Option B
Sulfur-fixing bacteria: In the sulfur cycle, no bacteria fix sulfur but it is reduced by sulfur-reducing bacteria such as Acidophilus and Acidobacillus ferrooxidans.
Option C
Potassium fixing bacteria: The potassium fixing bacteria is not present in legumes plants because no bacteria fix potassium but it is solubilized into the soluble form which the plants can utilize by Acidothiobacillus ferrooxidans and Bacillus mucilaginosus.
Final answer: The correct answer is option A.
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