When animal cells are grown in a petri dish, they typically stop dividing once they have formed a single, unbroken layer on the bottom of the dish. This arrest of division is an example of
A) mitosis S phase.
B) density-dependent inhibition.
C) lack of nutrients.

Question

Quizplus · Accepted Answer

Density-dependent inhibition is a phenomenon where cells stop dividing when they come into contact with other cells, typically when they form a single, unbroken layer. This is a mechanism that helps regulate the growth of cells and prevents overgrowth or tumors. Lack of nutrients can also cause cells to stop dividing, but in this scenario, the question does not provide any information that indicates a lack of nutrients as the cause of the arrest of division. Mitosis S phase refers to the stage of the cell cycle where DNA replication occurs and is not relevant to the scenario described in the question.

When Animal Cells Are Grown in a Petri Dish, They