AP Biology Unit 4 Review

Front

What occurs when the ligand binds to the receptor?

Back

Confirmation change in shape of receptor.

Front

How do cyclins and CDKs function in the cell cycle?

Back

Cyclins activate CDKs, which perform the work of cell division.

Front

What is the stage where the cell no longer divides?

Back

G0.

Front

What is a common final response in a signal transduction pathway?

Back

Transcription of a desired mRNA sequence.

Front

What is the primary purpose of mitosis?

Back

Ensure genetic material is properly transferred to daughter cells.

Front

Define ligand in the context of cell signaling.

Back

A molecule that binds to a receptor to initiate a cellular response.

Front

What is the role of receptors in cell signaling?

Back

Receptors detect signals (ligands) and initiate a response within the cell.

Front

Explain the function of cyclins in the cell cycle.

Back

Cyclins regulate the timing of the cell cycle by activating cyclin-dependent kinases (CDKs).

Front

What happens during the G1 phase of the cell cycle?

Back

The cell grows and prepares for DNA replication.

Front

What is the significance of the G0 phase?

Back

Cells in G0 are in a resting state and do not actively divide.