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Question #46229
The Question
A researcher develops a transgenic potato plant that constitutively overexpresses Abscisic Acid (ABA) specifically in its developing tubers during the active storage phase. Based on sink-source dynamics and hormonal metabolic shifts, what will be the primary physiological consequence in these tubers, and which animal hormone's catabolic action does this shift most closely mirror?
Options
- A.
Premature transition to dormancy with rapid starch mobilization, exhausting reserves; mirrors Glucagon.
- B.
Enhanced sink strength leading to massive starch accumulation; mirrors Insulin.
- C.
Delayed senescence with prolonged active growth of the tuber; mirrors Somatotropin.
- D.
Immediate sprouting of the tuber due to alpha-amylase inhibition; mirrors Epinephrine.
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
Stem_Modifications|Senescence_vs_Abscission|Insulin_vs_Glucagon_Effects
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students typically memorize ABA strictly as a 'growth inhibitor' and GA as the sole 'amylase activator' (from seed germination).
The trap lies in failing to synthesize how ABA-induced stress/dormancy in a sink organ (tuber) shifts metabolism from anabolic storage to catabolic mobilization (analogous to glucagon), depleting reserves.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Morphology of Flowering Plants - Class 11 |
| Concept | Stem Modifications |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |