NEET 2026
- Exam
- NEET
- Year
- 2026
- Subject
- Biology
- Chapter
- Chapter
NEET 2026 · Biology · Chapter
The small disc-shaped structures at the surface of the centromeres,...
The small disc-shaped structures at the surface of the centromeres, which serve as the sites of attachment for spindle fibres during karyokinesis, are known as:
Options
- ACentrioles
- BKinetochores
- CChiasmata
- DTelomeres
Correct answer
B. Kinetochores
Step-by-step solution
Kinetochores are small disc-shaped structures present at the surface of the centromeres. They serve as the sites of attachment for spindle fibres to the chromosomes during cell division (karyokinesis).
Centrioles are paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope, which play a role in organizing microtubules.
Chiasmata are the points of contact between two non-sister chromatids belonging to homologous chromosomes, where crossing over occurs during meiosis.
Telomeres are the repetitive nucleotide sequences at the ends of linear chromosomes which protect them from degradation.
Answer: Kinetochores
Centrioles are paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope, which play a role in organizing microtubules.
Chiasmata are the points of contact between two non-sister chromatids belonging to homologous chromosomes, where crossing over occurs during meiosis.
Telomeres are the repetitive nucleotide sequences at the ends of linear chromosomes which protect them from degradation.
Answer: Kinetochores