AP Biology: Unit 4 Review (CED)

Front

What occurs when the ligand binds to the receptor?

Back

A conformational change in the shape of the receptor.

Front

Which of the following is NOT involved with transduction?

Back

Ligands.

Front

What is the stage where the cell no longer divides?

Back

G0 phase.

Front

How do cyclins and CDKs function in the cell cycle?

Back

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

Front

Which of the following is NOT a stage of the cell cycle?

Back

Apoptosis.

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 secondary messengers in signal transduction?

Back

They amplify the signal within the cell after the receptor is activated.

Front

What is the function of CDKs in the cell cycle?

Back

Cyclin-dependent kinases (CDKs) regulate the progression of the cell cycle.

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 G2 phase?

Back

The cell continues to grow and prepares for mitosis.