Q100. Match the cell organelles in Column I with the appropriate functions in Column II
| Column I | Column II |
|---|---|
Options:
Cell organelles perform specialized functions essential for cellular processes, a common topic in CSIR NET Life Sciences exams. This question tests knowledge of peroxisome, endoplasmic reticulum (ER), Golgi complex, and centrioles matching with key roles like fatty acid oxidation and glycosylation.
Question Breakdown
Column I lists organelles: P. Peroxisome, Q. Endoplasmic reticulum, R. Golgi complex, S. Centrioles. Column II lists functions: (i) Conversion of lipid to carbohydrate (likely a distractor), (ii) Oxidation of fatty acids, (iii) N-linked glycosylation center, (iv) Microtubule organizing center, (v) O-linked glycosylation center. Options (A) to (D) provide matching codes.
Organelle Functions Explained
Peroxisomes handle beta-oxidation of very long-chain fatty acids, producing hydrogen peroxide detoxified by catalase, matching (ii). Endoplasmic reticulum (rough ER) initiates N-linked glycosylation on asparagine residues during protein translation in its lumen, matching (iii). Golgi complex modifies proteins, primarily performing O-linked glycosylation on serine/threonine in its cis and trans regions, matching (v). Centrioles act as microtubule organizing centers (MTOCs) for spindle formation in mitosis, matching (iv).
Correct Matching and Answer
The precise match is P-(ii), Q-(iii), R-(v), S-(iv), corresponding to option (C). Function (i) conversion of lipid to carbohydrate occurs in glyoxysomes (plant peroxisomes) via glyoxylate cycle, not listed here, serving as a distractor.
Exam Relevance for CSIR NET
Such matching questions appear in Unit 2 (Cellular Organization) of CSIR NET, emphasizing organelle roles in metabolism and protein processing. Focus on distinguishing N-linked (ER, co-translational) from O-linked (Golgi, post-translational) glycosylation for accuracy.
