CELL STRUCTURES AND FUNCTION
CELL DIVISION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cyclins
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growth factors
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mitotic spindles
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cancer cells
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Detailed explanation-1: -Proteins that respond to events outside the cell are called external regulators. External regulators direct cells to speed up or slow down the cell cycle. Cancer is a disorder in which some of the body’s own cells lose the ability to control growth.
Detailed explanation-2: -Growth factors (GFs) are a group of proteins stimulating the growth of specific tissues. GF plays important roles in the regulation of cell division that drives cell proliferation. Each GF binds to a specific cell–surface receptor.
Detailed explanation-3: -Growth factors-external regulators that stimulate the growth and division of cells.
Detailed explanation-4: -Two groups of proteins, called cyclins and cyclin-dependent kinases (Cdks), are termed, positive regulators. They are responsible for the progress of the cell through the various checkpoints.