Question:
Which of the following bacteria do not solubilize the insoluble rock phosphate?
Which of the following bacteria do not solubilize the insoluble rock phosphate?
Show Hint
Remember:
Pseudomonas & Bacillus $\rightarrow$ Phosphate solubilizers
Klebsiella & Beijerinckia $\rightarrow$ Nitrogen fixers
Klebsiella & Beijerinckia $\rightarrow$ Nitrogen fixers
Updated On: May 8, 2026
- Bacillus polymyxa and Pseudomonas striata.
- Micrococcus and Aspergillus spp.
- Pseudomonas striata and Agrobacterium.
- Klebsiella and Beijerinckia.
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Concept: Certain soil microorganisms are capable of converting insoluble phosphate (rock phosphate) into soluble forms that plants can absorb. These are called phosphate-solubilizing microorganisms (PSM).
• Common phosphate solubilizers:
• Bacillus polymyxa
• Pseudomonas striata
• Aspergillus spp. (fungi)
• Some bacteria are involved in nitrogen fixation, not phosphate solubilization:
• Klebsiella
• Beijerinckia
Step 1: Understand the requirement.
We need organisms that do NOT solubilize phosphate.
Step 2: Analyze each option.
• (A) Bacillus, Pseudomonas: Known phosphate solubilizers
• (B) Aspergillus: Phosphate solubilizing fungus (Micrococcus less common, but option invalid due to Aspergillus)
• (C) Pseudomonas: Solubilizer present, so incorrect
• (D) Klebsiella and Beijerinckia: Nitrogen-fixing bacteria, not phosphate solubilizers
Step 3: Conclusion.
Thus, Klebsiella and Beijerinckia do not solubilize rock phosphate. Final Answer: Option (D)
Was this answer helpful?
0
0
Top MHT CET Biology Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- Important sperm lysin used for dissolving egg covering is
- In biogas plant, the role of acidogenic bacteria is to
- In $C_{3}$ plants, the first stable product of photosynthesis during the dark reaction is
- In case of anaerobic respiration, the RQ is ___________
View More Questions
Top MHT CET Essential Mineral Elements Questions
- Which of the following conclusions was drawn from the Avery-MacLeod-McCarty experiment related to bacterial DNA?
Match elements given in Column I with their deficiency symptoms shown by plants given in Column II.
Column I Element Column II Deficiency Symptom i Calcium a Brown heart disease ii Boron b Malformed leaves iii Zinc c Poor growth of the plant iv Copper d Die-back of shoots
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions