Spindle fibers attach to kinetochores of chromosomes during:
(1) Prophase
(2) Metaphase
(3) Anaphase

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NEET is a competitive examination conducted in India. This question is from the 2024 NEET Biology paper.

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Question

Spindle fibers attach to kinetochores of chromosomes during:
(1) Prophase
(2) Metaphase
(3) Anaphase
(4) Telophase

Accepted Answer

Correct Answer: B — MetaphaseStep-by-step Solution:During cell division (mitosis), spindle fibers (microtubules) originate from the centrosomes. They attach to the kinetochores, which are protein structures located at the centromere of each sister chromatid. This attachment occurs during prometaphase and is fully established by metaphase. In metaphase, chromosomes align at the equatorial plate with spindle fibers attached to kinetochores. Prophase is characterized by condensation of chromosomes and formation of spindle, but attachment is not yet complete. Anaphase involves separation of sister chromatids after attachment. Telophase is when chromosomes decondense. Thus, the correct stage is metaphase.Key Concepts: Cell cycle – mitosis, kinetochore, spindle fibers, metaphase alignment, chromosome segregation.

Spindle fibers attach to kinetochores of chromosomes during: (1) Prophase (2) Metaphase (3) Anaphase (4) Telophase

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Spindle fibers attach to kinetochores of chromosomes during: (1) Prophase (2) Metaphase (3) Anaphase (4) Telophase

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More Questions from Cell Cycle and Cell Division

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