AP Biologymediummcq1 pt

A researcher is studying the role of feedback loops in regulating the cell cycle. Based on the data, which of the following is a characteristic of feedback loops in the cell cycle?

A.D) Feedback loops are always involved in the regulation of the G1/S checkpoint.

B.C) Feedback loops are always independent of external signals, regulating the cell cycle solely through intrinsic mechanisms.

C.B) Feedback loops often involve the inhibition of key cell cycle regulators, such as cyclin-dependent kinases.

D.A) Feedback loops always result in the activation of protein synthesis, promoting cell cycle progression.

Explanation

Core Concept

Feedback loops in the cell cycle often involve the inhibition of key cell cycle regulators, such as cyclin-dependent kinases. This is a mechanism by which the cell can regulate its own growth and proliferation. (Concept: Feedback Loops) The primary reason this is true is that feedback loops allow the cell to modulate its own growth and proliferation in response to internal and external signals.

A researcher is studying the role of feedback loops in regulating the cell cycle. Based on the data, which of the following is a characteristic of feedback loops in the cell cycle?

Explanation

Core Concept

Correct Answer