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Question #46696
The Question
The high-resolution mosaic vision of Periplaneta americana requires rapid ATP turnover to maintain the resting membrane potential of ommatidial photoreceptors. A novel insecticide selectively inhibits the translation of an enzyme complex containing cytochromes a and a3 by binding to the 70S ribosomes of a specific intracellular organelle. Which of the following correctly identifies the direct physiological consequence on the photoreceptors and a key characteristic of the targeted organelle?
Options
- A.
Chronic depolarization due to Na+/K+ pump failure; the organelle contains a single circular dsDNA and divides by fission.
- B.
Chronic hyperpolarization due to continuous K+ efflux; the organelle contains linear dsDNA and replicates via mitosis.
- C.
Inability to depolarize due to voltage-gated Na+ channel blockade; the organelle contains a single circular ssDNA.
- D.
Failure of repolarization due to Ca2+ pump inhibition; the organelle is a non-membrane bound structure of endosymbiotic origin.
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
Photoreceptor ATP Demand|Mitochondria|ETS Complex Specificity
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: This question requires the synthesis of four distinct NCERT chapters (Cell, Respiration, Neural Control, and Structural Organization).
The primary trap is the physiological consequence of ATP depletion: students often mistakenly believe that a lack of ATP prevents depolarization (thinking of action potentials), whereas it actually prevents the maintenance of the resting potential, causing the cell to chronically depolarize as ion gradients naturally run down.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Structural Organisation in Animals - Class 11 |
| Concept | Mosaic Vision Processing |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |