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Question #46895
The Question
The living state is defined as a non-equilibrium steady state capable of performing work. When a competitive inhibitor (e.g., malonate) is introduced into a specific metabolic pathway of a living cell, it creates a localized metabolic block. Which of the following statements regarding this phenomenon is INCORRECT?
Options
- A.
The inhibitor reduces the metabolic flux by increasing the Km of the target enzyme, while the Vmax remains theoretically unchanged.
- B.
The accumulation of the specific substrate upstream of the block can overcome the inhibition, allowing the cell to attempt restoration of its steady state.
- C.
Unlike an isolated in vitro enzyme assay, the living cell utilizes this metabolic block to reach thermodynamic equilibrium, thereby conserving cellular energy.
- D.
The structural analog competes for the active site, demonstrating why isolated in vitro reactions are considered 'living reactions' but not 'living things' due to the lack of integrated homeostatic regulation.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Regulatory_Failure
Understand how NOT, EXCEPT, and logical constraints are used to manipulate exam results.
Concepts Behind This Question
Metabolic Flux and Steady State|Competitive Enzyme Inhibition Kinetics
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students frequently confuse 'steady state' with 'thermodynamic equilibrium'.
In biological systems (NCERT Biomolecules), a steady state is strictly non-equilibrium.
The trap relies on the chemical intuition that systems 'want' to reach equilibrium to conserve energy, whereas in biology, thermodynamic equilibrium equals cellular death.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | The Living World - Class 11 |
| Concept | Metabolism vs. In-vitro Reactions |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |