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B
Sphaerosome
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C
Chromosome
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D
Endoplasmic reticulum
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Solution
The correct option is C Chromosome The kinetochore is the protein structure on chromatids where the spindle fibers attach during cell division to pull sister chromatids apart. The kinetochore forms in eukaryotes assemble on the centromere and link the chromosome to microtubule polymers from the mitotic spindle during mitosis and meiosis.