NEET 2026
- Exam
- NEET
- Year
- 2026
- Subject
- Biology
- Chapter
- Chapter
NEET 2026 · Biology · Chapter
Given below are two cross-sectional diagrams labeled as Figure X...
Given below are two cross-sectional diagrams labeled as Figure X and Figure Y, representing specific cell organelles. Match the items in List I with their corresponding descriptions in List II based on these structures.
| List I | List II | ||
|---|---|---|---|
| A | Figure X | I | Proteinaceous central part of a centriole |
| B | Figure Y | II | Encloses the centrally located microtubules |
| C | Central sheath | III | Organelle with a cartwheel-like organisation |
| D | Hub | IV | Core structure possessing a 9+2 microtubular array |
Choose the correct answer from the options given below:
Options
- AA-IV, B-III, C-I, D-II
- BA-III, B-IV, C-I, D-II
- CA-IV, B-III, C-II, D-I
- DA-III, B-IV, C-II, D-I
Correct answer
C. A-IV, B-III, C-II, D-I
Step-by-step solution
Based on the provided cross-sectional diagrams:
Figure X represents the internal structure (axoneme) of a cilium or flagellum. It shows a characteristic arrangement of microtubules, with peripheral doublets and centrally located singlet microtubules. Thus, A matches with IV.
Figure Y represents the cross-section of a centriole. It exhibits a arrangement with peripheral triplets of microtubules and no central microtubules, giving it a cartwheel-like organisation. Thus, B matches with III.
The central sheath is a structure found in cilia and flagella (Figure X) that encloses the two centrally located singlet microtubules. Thus, C matches with II.
The hub is the proteinaceous central part of a centriole (Figure Y) from which radial spokes emanate towards the peripheral triplets. Thus, D matches with I.
The correct matching is A-IV, B-III, C-II, D-I.
Answer: A-IV, B-III, C-II, D-I
Figure X represents the internal structure (axoneme) of a cilium or flagellum. It shows a characteristic arrangement of microtubules, with peripheral doublets and centrally located singlet microtubules. Thus, A matches with IV.
Figure Y represents the cross-section of a centriole. It exhibits a arrangement with peripheral triplets of microtubules and no central microtubules, giving it a cartwheel-like organisation. Thus, B matches with III.
The central sheath is a structure found in cilia and flagella (Figure X) that encloses the two centrally located singlet microtubules. Thus, C matches with II.
The hub is the proteinaceous central part of a centriole (Figure Y) from which radial spokes emanate towards the peripheral triplets. Thus, D matches with I.
The correct matching is A-IV, B-III, C-II, D-I.
Answer: A-IV, B-III, C-II, D-I