SGHS AP Bio Unit 4 Review

Front

What is a G protein?

Back

A protein on the cytoplasmic side of a membrane involved in signal relay.

Front

What is Cdk?

Back

A protein maintained at constant levels throughout the cell cycle that requires cyclin to become catalytically active.

Front

What occurs during anaphase?

Back

Centromeres uncouple, sister chromatids separate, and the two new chromosomes move to opposite poles of the cell.

Front

What is the correct order of cell cycle phases represented by D, A, F, C, E, B?

Back

D: G1 phase, A: S phase, F: G2 phase, C: M phase, E: Cytokinesis, B: G0 phase.

Front

What is the G2 checkpoint responsible for?

Back

Verifying that the DNA has been completely replicated and checked for errors.

Front

Define signal transduction pathway.

Back

A series of molecular events and chemical reactions that lead to a cellular response following a signal.

Front

What role do cyclins play in the cell cycle?

Back

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

Front

What happens during the S phase of the cell cycle?

Back

DNA replication occurs, resulting in the duplication of chromosomes.

Front

What is the function of MPF (Maturation Promoting Factor)?

Back

MPF is a complex that triggers the cell's passage past the G2 checkpoint into mitosis.

Front

What is the significance of checkpoints in the cell cycle?

Back

Checkpoints ensure that the cell cycle progresses only when certain conditions are met, preventing errors.