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Unformatted text preview: Question 3 1 / 1 point Regarding the regulation of cell division, cyclins are signals to turn cell division "on". when cyclins bind to Cdk, they activate Cdk, which can then phosphorylate RB. active RB is a molecule that keeps cells in G1. the default is for cell division to be "off" for most cells. Question 4 1 / 1 point Cancer cells often have mutated genes whose normal function is to regulate the cell cycle. are cells whose cell cycle is no longer being controlled. don't need "on" signals in order to divide. are foreign cells that invade our bodies and attack our own cells. Question 5 1 / 1 point...
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