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Question #47662
The Question
In a terrestrial ecosystem, the decomposition of detritus rich in lignin and chitin is notably slow. This ecological phenomenon is directly tied to the metabolic constraints of soil microbes. Which of the following statements is INCORRECT regarding the link between microbial cellular respiration and ecosystem nutrient cycling in this scenario?
Options
- A.
The recalcitrant nature of lignin limits the availability of simple sugars, reducing the rate of glycolysis in decomposers.
- B.
Reduced metabolic flux decreases Substrate Level Phosphorylation during the conversion of Succinyl-CoA to Succinic acid, limiting immediate ATP availability.
- C.
To compensate for the low ATP yield from restricted Substrate Level Phosphorylation, microbes accelerate the mineralization phase to rapidly extract inorganic nutrients.
- D.
The diminished ATP production restricts microbial population growth, which indirectly stalls the release of inorganic substances from humus.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Detritivores|Succinyl-CoA Synthetase|Pyruvate Kinase|Mineralization
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: This question bridges NCERT Class 12 Ecology (Decomposition) with Class 11 Plant Physiology (Respiration).
The trap relies on teleological thinking—students often mistakenly believe organisms can actively 'compensate' by accelerating an ecological phase (Mineralization), failing to realize that mineralization is a passive ecological outcome strictly dependent on the microbial population's metabolic vigor and ATP flux.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Respiration in Plants - Class 11 |
| Concept | Substrate Level Phosphorylation (SLP) Sites |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |