CELL STRUCTURES AND FUNCTION
CELL DIVISION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Chromosomes arrange themselves along the equator
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Spindle fibers get attached to the centromeres
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Spindle fibers get attached to the nucleosome
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None of the above
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Detailed explanation-1: -The centromere is the part of a chromosome that links sister chromatids. During mitosis, spindle fibers attach to the centromere via the kinetochore. Kinetochores generate kinetochore fibers, which attach sister chromatids to spindle fibers.
Detailed explanation-2: -During metaphase, spindle fibers attach to the centromere of each pair of sister chromatids (see Figure below). The sister chromatids line up at the equator, or center, of the cell.
Detailed explanation-3: -Acentric are the chromosome which does not have centromere as acentric chromosome do not have the centromere they lack the point where spindle fiber attach. Hence they do not provide the attachment site for spindle fibers.
Detailed explanation-4: -Spindle fibres attach themselves to the kinetochore of the chromosomes and help to pull sister chromatids towards opposite poles. Kinetochores are proteinaceous disc-like structures present on the sides of the centromere.