Q.35 Match items in Group I with Group II.
| Group I | Group II |
|---|---|
| P. Glycolytic pathway Q. Eukaryotic oxidative metabolism R. Glyoxylate cycle S. Calvin cycle |
1. Chloroplast 2. Glyoxysomes 3. Mitochondria 4. Cytosol |
Glycolytic pathway occurs in the cytosol, eukaryotic oxidative metabolism in mitochondria, glyoxylate cycle in glyoxysomes, and Calvin cycle in chloroplasts. Option (C) correctly matches these locations: P-4, Q-3, R-2, S-1.
Option Analysis
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(A) P-1, Q-2, R-3, S-4: Incorrect; glycolytic pathway is not in chloroplasts (1), and Calvin cycle is not in cytosol (4).
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(B) P-2, Q-3, R-4, S-1: Incorrect; glycolytic pathway and glyoxylate cycle do not both occur in glyoxysomes (2 and 4 swapped).
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(C) P-4, Q-3, R-2, S-1: Correct; matches cytosol (glycolysis), mitochondria (oxidative metabolism), glyoxysomes (glyoxylate cycle), and chloroplasts (Calvin cycle).
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(D) P-3, Q-4, R-1, S-2: Incorrect; glycolysis is not mitochondrial (3), and glyoxylate cycle is not chloroplastic (1).
Glycolytic pathway location, eukaryotic oxidative metabolism, glyoxylate cycle, and Calvin cycle represent core metabolic processes in cells, each confined to specific organelles for efficiency. This Group I Group II matching question tests precise knowledge of these sites, vital for exams like GATE Biotechnology.
Key Metabolic Pathways
Glycolysis breaks down glucose anaerobically in the cytosol, yielding pyruvate and ATP without organelles. Eukaryotic oxidative metabolism, including Krebs cycle and electron transport, occurs in mitochondria for aerobic ATP production. Glyoxylate cycle, bypassing CO2-losing steps of Krebs, enables fat-to-carbohydrate conversion in glyoxysomes of germinating seeds. Calvin cycle fixes CO2 into sugars during photosynthesis exclusively in chloroplast stroma.
Matching Correctness
Standard cellular biology confirms: P (glycolytic pathway) to 4 (cytosol), Q to 3 (mitochondria), R to 2 (glyoxysomes), S to 1 (chloroplast). This alignment (option C) reflects prokaryotic/eukaryotic conservation and plant-specific adaptations.
Exam Relevance
Such questions emphasize organelle functions in biochemical engineering and microbiology, aligning with user expertise in enzyme kinetics and bioprocesses. Practice reinforces pathway regulation and compartmentation.
