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All of the following statements concerning the Actinomycetes filamentous soil bacterium Frankia are correct except that Frankia : [2005]
a)Can induce root nodules on many plant species
b)Cannot fix nitrogen in the free-living state.
c)Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids
d)All of the above
Correct answer is option 'D'. Can you explain this answer?
a)Can induce root nodules on many plant species
b)Cannot fix nitrogen in the free-living state.
c)Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids
d)All of the above
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
All of the following statements concerning the Actinomycetes filamento...
Frankia, is a nitrogen fixing mycelial bacterium which is associated symbiotically (and not free living) with the root nodules of several non legume plants.
This question is part of UPSC exam. View all NEET courses
Most Upvoted Answer
All of the following statements concerning the Actinomycetes filamento...
Frankia is a nitrogen-fixing bacterium that lives in the soil. It has a symbiotic relationship with many plants. It is also found as free-living strain. The actinomycete Frankia is of fundamental and ecological interests for several reasons. Frankia will fix nitrogen in both the free-living and the symbiotic state.
Community Answer
All of the following statements concerning the Actinomycetes filamento...
Explanation:
The correct answer is option 'D' - All of the above statements are correct.
Reasoning:
Let's analyze each statement one by one:
1. Can induce root nodules on many plant species: Frankia is a filamentous soil bacterium that has the ability to form mutualistic associations with a wide range of plants, including many tree species such as alders, casuarinas, and elms. It can induce the formation of root nodules in these plants, where it resides and establishes a symbiotic relationship.
2. Cannot fix nitrogen in the free-living state: Frankia is a nitrogen-fixing bacterium, meaning it has the ability to convert atmospheric nitrogen (N2) into a usable form, such as ammonia (NH3), through the process of nitrogen fixation. However, it is unable to fix nitrogen in the free-living state, meaning it requires a host plant to provide the necessary conditions for nitrogen fixation to occur.
3. Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids: Frankia forms specialized structures called vesicles within the root nodules of the host plant. These vesicles play a crucial role in nitrogen fixation by providing an environment that protects the nitrogenase enzyme from oxygen, which can inhibit its activity. Frankia achieves this oxygen protection through a chemical barrier involving triterpene hopanoids, which prevent the entry of oxygen into the vesicles and maintain an anaerobic environment suitable for nitrogen fixation.
Therefore, all of the given statements about Frankia are correct, and the correct answer is option 'D' - All of the above.
The correct answer is option 'D' - All of the above statements are correct.
Reasoning:
Let's analyze each statement one by one:
1. Can induce root nodules on many plant species: Frankia is a filamentous soil bacterium that has the ability to form mutualistic associations with a wide range of plants, including many tree species such as alders, casuarinas, and elms. It can induce the formation of root nodules in these plants, where it resides and establishes a symbiotic relationship.
2. Cannot fix nitrogen in the free-living state: Frankia is a nitrogen-fixing bacterium, meaning it has the ability to convert atmospheric nitrogen (N2) into a usable form, such as ammonia (NH3), through the process of nitrogen fixation. However, it is unable to fix nitrogen in the free-living state, meaning it requires a host plant to provide the necessary conditions for nitrogen fixation to occur.
3. Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids: Frankia forms specialized structures called vesicles within the root nodules of the host plant. These vesicles play a crucial role in nitrogen fixation by providing an environment that protects the nitrogenase enzyme from oxygen, which can inhibit its activity. Frankia achieves this oxygen protection through a chemical barrier involving triterpene hopanoids, which prevent the entry of oxygen into the vesicles and maintain an anaerobic environment suitable for nitrogen fixation.
Therefore, all of the given statements about Frankia are correct, and the correct answer is option 'D' - All of the above.
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All of the following statements concerning the Actinomycetes filamentous soil bacterium Frankia are correct except that Frankia : [2005]a)Can induce root nodules on many plant speciesb)Cannot fix nitrogen in the free-living state.c)Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoidsd)All of the aboveCorrect answer is option 'D'. Can you explain this answer?
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All of the following statements concerning the Actinomycetes filamentous soil bacterium Frankia are correct except that Frankia : [2005]a)Can induce root nodules on many plant speciesb)Cannot fix nitrogen in the free-living state.c)Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoidsd)All of the aboveCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about All of the following statements concerning the Actinomycetes filamentous soil bacterium Frankia are correct except that Frankia : [2005]a)Can induce root nodules on many plant speciesb)Cannot fix nitrogen in the free-living state.c)Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoidsd)All of the aboveCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for All of the following statements concerning the Actinomycetes filamentous soil bacterium Frankia are correct except that Frankia : [2005]a)Can induce root nodules on many plant speciesb)Cannot fix nitrogen in the free-living state.c)Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoidsd)All of the aboveCorrect answer is option 'D'. Can you explain this answer?.
All of the following statements concerning the Actinomycetes filamentous soil bacterium Frankia are correct except that Frankia : [2005]a)Can induce root nodules on many plant speciesb)Cannot fix nitrogen in the free-living state.c)Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoidsd)All of the aboveCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about All of the following statements concerning the Actinomycetes filamentous soil bacterium Frankia are correct except that Frankia : [2005]a)Can induce root nodules on many plant speciesb)Cannot fix nitrogen in the free-living state.c)Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoidsd)All of the aboveCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for All of the following statements concerning the Actinomycetes filamentous soil bacterium Frankia are correct except that Frankia : [2005]a)Can induce root nodules on many plant speciesb)Cannot fix nitrogen in the free-living state.c)Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoidsd)All of the aboveCorrect answer is option 'D'. Can you explain this answer?.
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