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CellCycleRegulators

Cell Cycle Regulators

QuestionAnswer
________ limits the number of times a cell can divide aging
growth control mechanisms allow ______ _______ only under certain conditions cell division
Healing - cells will divide until the wound closes and new cells touch or come in contact with neighboring cells. Then _________ ________ will cause cell division to cease. contact inhibition
a family of proteins whose concentrations fluctuate throughout the cell cycle cyclins
each type of cyclin accumulates during a different phase and _________ ___ __________ of the cell into the next phase of the cell cycle. stimulates the passage
Growth control also depends on several _________ ___________ _________ which also regulate passage of the cell through the cell cycle tumor suppressor proteins
unregulated cell division: cancer
Cancer cells divide uncontrollably forming masses of cells called __________ tumors
Tumors grow at the expense of surrounding _________ ____ __________ cells and tissues
Cancer cells may break free from tumors and circulate through the body causing ___________ of the cancer metastasis
An astonishing number of cancer cells have a mutation in the _____ gene which halts the cell cycle until all chromosomes have properly replicated. p53
which type of muscle tissue can divide? smooth muscle
Chromosomes are made up of DNA wound tightly around __________ proteins. histone
DNA wound tightly around eight histone proteins forms a __________ unit. nucleosome
Nucleosomes are often referred to as “__________” on a string with the “string” being the DNA beads
Folding reduces the average chromosome from a length of about _____ to about _____ however, the average nucleus is only 5um 5 cm, 1 mm
Created by: serverge
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