Which of the following types of feedback loop would be most effective in controlling cell growth in response to nutrient availability?

Core Concept

Negative feedback loops are effective in controlling cell growth by creating a balance between growth-promoting and growth-inhibiting signals. When nutrients are present, growth-promoting signals are activated, and when nutrients are scarce, growth-inhibiting signals are activated. This ensures that cell growth is tightly regulated in response to nutrient availability. Options A and C are incorrect because feedforward and positive feedback loops would not create a balance between growth-promoting and growth-inhibiting signals. Option D is incorrect because oscillatory feedback loops are not typically involved in controlling cell growth.