Contact inhibition is an important mechanism for maintaining cell growth in developed organs and tissues. Suppose the organ and tissue cells remain in contact with each other. In order to prevent the cells from dividing, which phase of the cell cycle must they be in?

Question

Quizplus · Accepted Answer

Contact inhibition occurs during the G1 phase of the cell cycle. Option B shows cells in G1 phase with 1 copy of DNA (1U) and 0 centrosomes (B0), which is the appropriate phase for cells to remain in contact inhibition. Options A and C show cells with extra DNA copies (2U) and option D shows cells in the prophase stage of mitosis, which is not the phase associated with contact inhibition.

Contact Inhibition Is an Important Mechanism for Maintaining Cell Growth