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Question #47614
The Question
During high oxygen tension and high light intensity, RuBisCO shifts to its oxygenase activity, initiating the photorespiratory pathway in plants. Which of the following statements regarding this metabolic pathway is INCORRECT?
Options
- A.
It involves the coordinated movement of metabolites across the chloroplast, peroxisome, and mitochondrion to salvage carbon.
- B.
The primary enzyme binds with to yield one molecule of a 3-carbon compound and one molecule of a 2-carbon compound in the chloroplast.
- C.
The release of and occurs in the peroxisome during the condensation of two molecules of glycine into one molecule of serine.
- D.
The pathway does not synthesize sugars or ATP; rather, it results in the consumption of ATP during the phosphorylation of glycerate.
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
RuBisCO|Peroxisomes|Chloroplasts|C3_Plants
Why This Question Is Tricky
Common Mistakes
Location Specificity Trap: Students often memorize the sequence of organelles involved in photorespiration (Chloroplast -> Peroxisome -> Mitochondrion) but fail to map the specific biochemical reactions to their correct locations.
The critical decarboxylation step (where is actually lost, reducing net primary productivity) occurs in the mitochondrion, not the peroxisome.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Photosynthesis in Higher Plants - Class 11 |
| Concept | Photorespiration Metabolic Cost |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |