AP Biology Unit 4 Cell Cycle and Cell Communication

Front

What are the three phases of interphase?

Back

G1 (Gap 1), S (Synthesis), G2 (Gap 2)

Front

What is the main purpose of the cell cycle?

Back

To ensure proper cell division and replication of DNA.

Front

What is mitosis?

Back

The process of cell division that results in two genetically identical daughter cells.

Front

What is cytokinesis?

Back

The division of the cytoplasm to form two separate daughter cells after mitosis.

Front

What is the role of cyclins in the cell cycle?

Back

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

Front

What is apoptosis?

Back

Programmed cell death that occurs in multicellular organisms.

Front

What is a ligand?

Back

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

Front

What is the difference between plant and animal cell mitosis?

Back

Plant cells form a cell plate during cytokinesis, while animal cells form a cleavage furrow.

Front

What occurs during metaphase?

Back

Chromosomes align at the cell's equatorial plane, and spindle fibers attach to their centromeres.

Front

What is the significance of the G1 checkpoint?

Back

It checks for cell size, nutrients, and DNA integrity before the cell enters the S phase.