Density-dependent inhibition is explained by which of the following?
A) As cells become more numerous, they begin to squeeze against each other, restricting their size and ability to produce control factors.
B) As cells become more numerous, the cell surface proteins of one cell contact the adjoining cells and they stop dividing.
C) As cells become more numerous, the protein kinases they produce begin to compete with each other, such that the proteins produced by one cell essentially cancel those produced by its neighbor.
D) As cells become more numerous, more and more of them enter the S phase of the cell cycle.
E) As cells become more numerous, the level of waste products increases, eventually slowing down metabolism.

Question

Quizplus · Accepted Answer

Density-dependent inhibition occurs when the cell surface proteins of one cell contact the adjoining cells and they stop dividing, thereby regulating cell population density. This mechanism helps maintain tissue homeostasis and prevent uncontrolled cell proliferation. Option A is incorrect as it describes cell contact inhibition. Option C is incorrect as it is not a recognized mechanism for density-dependent inhibition. Option D is incorrect as it suggests an incorrect relationship between cell density and the cell cycle. Option E is incorrect as waste product accumulation is not a factor in density-dependent inhibition.

Density-Dependent Inhibition Is Explained by Which of the Following