AP Biology Unit 4 Review

Front

What are the key checkpoints in the cell cycle regulation?

Back

G1/S checkpoint, G2/M checkpoint, metaphase checkpoint.

Front

How do cancer cells differ from normal cells in terms of cell cycle regulation?

Back

Cancer cells have dysregulated cell cycle control due to mutations in cell cycle regulatory genes.

Front

What is the significance of mitosis in the cell cycle?

Back

Mitosis ensures genetic stability and growth by producing two identical daughter cells.

Front

What is the primary role of receptor proteins in cell signaling?

Back

To receive and respond to chemical signals.

Front

How do steroid hormones transmit their signal inside a cell?

Back

By entering the cell and directly binding to intracellular receptors.

Front

What is the function of the G1/S checkpoint in the cell cycle?

Back

It checks for DNA damage and ensures the cell is ready for DNA synthesis.

Front

What happens at the G2/M checkpoint?

Back

It ensures that DNA has been replicated correctly and checks for DNA damage before mitosis.

Front

What is the role of cyclins in cell cycle regulation?

Back

Cyclins are proteins that regulate the cell cycle by activating cyclin-dependent kinases (CDKs).

Front

What is apoptosis and its significance in the cell cycle?

Back

Apoptosis is programmed cell death that eliminates damaged or unnecessary cells, maintaining tissue homeostasis.

Front

How do growth factors influence the cell cycle?

Back

Growth factors stimulate cell division by promoting the progression through the cell cycle checkpoints.