AP Biology Unit 4 review

Front

What is anaphase?

Back

Anaphase is the stage of mitosis where sister chromatids are separated and kinetochores begin pulling chromosomes to opposite poles of the cell.

Front

What is the role of cyclin in the cell cycle?

Back

Cyclin interacts with cyclin-dependent kinase (CdK) to initiate the mitotic phase of the cell cycle.

Front

What are the responses of a cell to a signal transduction pathway?

Back

Responses can include cell growth, gene expression, and secretion of molecules.

Front

What type of feedback loop do mammals use to maintain body temperature?

Back

Mammals use a negative feedback loop to maintain a constant body temperature.

Front

What is the end result of mitosis?

Back

The end result of mitosis is two genetically identical diploid cells.

Front

Define mitosis.

Back

Mitosis is the process of cell division that results in two genetically identical daughter cells.

Front

What is the function of spindle fibers during mitosis?

Back

Spindle fibers attach to centromeres and help separate sister chromatids during anaphase.

Front

What is the significance of cyclin-dependent kinases (CdKs)?

Back

CdKs are enzymes that, when activated by cyclins, drive the cell cycle forward.

Front

What is a signal transduction pathway?

Back

A signal transduction pathway is a series of molecular events and interactions that lead to a cellular response following a signal.

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite external changes.