THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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to allow the chromosomes to move without becoming entangled and breaking
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to allow the sister chromatids to remain attached
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Detailed explanation-1: -Chromosomes are coiled structures made of DNA and proteins. Chromosomes are the form of the genetic material of a cell during cell division. It is this coiled structure that ensures proper segregation of the chromosomes during cell division.
Detailed explanation-2: -Chromosome Condensation This condensation is needed to allow the chromosomes to move along the mitotic spindle without becoming tangled or broken during their distribution to daughter cells. DNA in this highly condensed state can no longer be transcribed, so all RNA synthesis stops during mitosis.
Detailed explanation-3: -These nucleosomes coil and stack together to form fibers called chromatin. Chromatin, in turn, loops and folds with the help of additional proteins to form chromosomes. Condensing DNA into chromosomes prevents DNA tangling and damage during cell division.
Detailed explanation-4: -Anaphase B depends on motor proteins at the poles that pull the poles apart, as well as on motor proteins at the central spindle (the bundles of antiparallel overlap microtubules between the separating chromosomes) that push the poles apart (Figure 18-26).