In contrast to centromere, the kinetochore is a
Correct answer: D. Protein complex where spindle fibres are attached
- A. Primary constriction of a chromosome
- B. Point where two sister chromatids meet
- C. Region of DNA in the middle of a chromosome
- D. Protein complex where spindle fibres are attached
Explanation
The correct answer is Option D. The kinetochore is a protein complex that forms at the centromere of each chromosome and serves as the attachment site for spindle fibers during cell division. This allows the chromosomes to be pulled apart into the daughter cells.Option A and B describe features of the centromere, which is the primary constriction of a chromosome and the point where two sister chromatids meet, respectively. Option C is misleading because it suggests a general location without specifying the functional role of the kinetochore.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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