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Question #46893
The Question
A hypercholesterolemic patient is treated with a bioactive molecule extracted from the yeast Monascus purpureus. Which of the following statements correctly evaluates the impact of this molecule on the patient's cellular metabolism?
Options
- A.
It acts as a non-competitive inhibitor, permanently altering the active site of HMG-CoA reductase and halting all lipid metabolism.
- B.
It competitively inhibits the enzyme by lowering its activation energy, thereby pausing a specific metabolic pathway while keeping the organism alive.
- C.
It structurally resembles the substrate and competes for the active site, altering specific metabolic flux without negating metabolism as a defining property of life.
- D.
It binds to the allosteric site of the enzyme, stopping the sum total of chemical reactions in the hepatic cells to prevent cholesterol synthesis.
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
Defining Properties Criteria|Enzyme Kinetics|Statin Mechanism
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Integrates 'Microbes in Human Welfare' (Statins), 'Biomolecules' (Competitive Inhibition), and 'The Living World' (Metabolism).
The trap lies in confusing the cessation of a single metabolic pathway with the cessation of 'Metabolism' as a whole, and misattributing the lowering of activation energy to inhibitors rather than enzymes.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | The Living World - Class 11 |
| Concept | Defining Properties Criteria |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |