NEETBotanyCell Cycle and Cell Division
Read the following statements regarding the events of mitosis and select the incorrect statement.
Options
- ASpindle fibres attach to kinetochores of chromosomes during metaphase.
- BThe plane of alignment of the chromosomes at metaphase is referred to as the metaphase plate.
- CCentromeres split and chromatids separate during anaphase.
- DKinetochores are small disc-shaped structures situated on the surface of the centrosomes.
Correct answer
D. Kinetochores are small disc-shaped structures situated on the surface of the centrosomes.
Step-by-step solution
Kinetochores are small disc-shaped structures present on the surface of the centromeres, not centrosomes. They serve as the sites of attachment for spindle fibres to the chromosomes. The centrosome is an organelle located near the nucleus that helps organize microtubules and the spindle apparatus during cell division. The other statements correctly describe the events occurring during metaphase and anaphase of mitosis as per NCERT. Answer: Kinetochores are small disc-shaped structures situated on the surface of the