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Question

Sister chromatids are held together by _________.


A

Centromere

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B

Centrosome

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C

Chromatin

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D

Nucleolus

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Solution

The correct option is

C

Centromere


Before cell division, chromosomes are replicated, so that each chromosome consists of two identical "sister" chromatids. Sister chromatids are attached to an area called the centromere.

The centrosome is an organelle that is the main place where cell microtubules are organized. Chromatin is a mass of genetic material composed of DNA and proteins that condense to form chromosomes during eukaryotic cell division. The nucleolus is the small dense spherical structure in the nucleus of a cell during interphase.


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