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Question #45140
The Question
Adenosine deaminase (ADA) deficiency causes SCID by creating a metabolic bottleneck, where the failure to deaminate deoxyadenosine leads to its toxic accumulation, halting lymphocyte proliferation. Consider an analogous 'throughput failure' in an ecosystem's detritus food chain, where the degradation of a highly resistant, dark amorphous substance is completely inhibited due to the absence of specific microbes. Which ecosystem process is directly halted, and what is the resulting 'accumulated substrate'?
Options
- A.
Catabolism; accumulation of raw detritus
- B.
Mineralization; accumulation of humus
- C.
Humification; accumulation of partially decomposed organic matter
- D.
Immobilization; accumulation of inorganic nutrients
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
ADA_Enzyme|Mineralization|Nutrient_Cycling
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: The student must map the concept of 'substrate accumulation due to a missing biological catalyst' from molecular genetics (ADA/SCID) to ecosystem ecology (Microbes/Mineralization).
The trap relies on the student correctly identifying the 'dark amorphous substance' as humus and distinguishing its degradation (Mineralization) from its formation (Humification) or the general breakdown of detritus (Catabolism).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biotechnology and Its Applications - Class 12 |
| Concept | ADA Deficiency Genetic Correction |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |