Match List I with List II :
List I | List II | ||
|---|---|---|---|
| A | Axoneme | I | Centriole |
| B | Cartwheel pattern | II | Cilia and flagella |
| C | Crista | III | Chromosome |
| D | Satellite | IV | Mitochondria |
Choose the correct answer from the options given below:
Correct Answer :
A-II, B-I, C-IV, D-III
Solution :
The correct answer is A-II, B-I, C-IV, D-III.
Let us analyze and match each item in List I with its corresponding structure/function in List II step-by-step:
1. A. Axoneme matches with II. Cilia and flagella:
The core of cilia and flagella is called the axoneme. It consists of a specific arrangement of microtubules, typically showing a 9 + 2 pattern (nine pairs of peripheral doublets and one pair of centrally located microtubules) enclosed by a plasma membrane.
2. B. Cartwheel pattern matches with I. Centriole:
The proximal region of a centriole is made of proteinaceous material and is called the hub. This hub is connected to peripheral triplets of microtubules by radial spokes, resembling the spokes of a wheel. This structure is famously referred to as the cartwheel pattern (showing a 9 + 0 microtubule arrangement).
3. C. Crista matches with IV. Mitochondria:
The inner membrane of a mitochondrion features multiple finger-like or plate-like infoldings called cristae (singular: crista). These folds project into the matrix and serve to significantly increase the surface area available for cellular respiration and ATP-generating chemical reactions.
4. D. Satellite matches with III. Chromosome:
Certain chromosomes possess non-staining secondary constrictions at a constant location. The chromosome segment distal to this secondary constriction behaves as a small knob-like fragment called a satellite.
Combining all these correct associations, we get:
A → II, B → I, C → IV, and D → III.
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