Internal regulators are proteins that regulate cell growth from inside of the cell. External regulators are proteins outside of the cell that also regulate cell growth.Click to see full answer. Similarly, you may ask, what is an internal regulator of the cell cycle?Explanation: Internal regulators are special proteins that permit the cell cycle to continue only when certain conditions have been met inside the cell. For example mitosis can’t proceed unless the DNA has been copied. Thus it allows the cell cycle to proceed only when certain processes have happened inside the cell.Subsequently, question is, what is an example of an external regulator? External regulators that respond to events outside the cell and speed up or slow down the cell cycle. What is an example of an external regulator? Proto-oncogenes that promote cell division and tumor suppressors that inhibit cell division. With both of these off cancer cells form. One may also ask, do internal regulators stop the cell cycle? Regulator Molecules of the Cell Cycle. In addition to the internally controlled checkpoints, there are two groups of intracellular molecules that regulate the cell cycle. These regulatory molecules either promote progress of the cell to the next phase (positive regulation) or halt the cycle (negative regulation).Are growth factors internal or external regulators?Internal Regulators Proteins that respond to events inside the cell are called internal regulators. External regulators direct cells to speed up or slow down the cell cycle. Growth factors are among the most important external regulators. They stimulate the growth and division of cells.
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