AP Biology Unit 4

Front

What is Anaphase?

Back

Anaphase is the stage of mitosis where sister chromatids are separated and pulled to opposite poles of the cell by the spindle fibers.

Front

What is a negative feedback loop?

Back

A negative feedback loop is a biological mechanism that counteracts a change in a system, helping to maintain homeostasis, such as body temperature regulation.

Front

What evidence supports the evolution of cell communication?

Back

The similarity of communication processes in prokaryotic and eukaryotic cells suggests that cell communication has evolved over billions of years.

Front

What is Telophase?

Back

Telophase is the final stage of mitosis where chromosomes decondense and two nuclei form within the cell.

Front

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

Back

Apoptosis is not a stage of the cell cycle; it is a process of programmed cell death.

Front

Define Mitosis.

Back

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

Front

What occurs during Prophase?

Back

During Prophase, chromatin condenses into visible chromosomes, the nuclear membrane breaks down, and spindle fibers begin to form.

Front

What is Cytokinesis?

Back

Cytokinesis is the process that follows mitosis, where the cytoplasm of a parental cell divides into two daughter cells.

Front

What role do kinetochores play in cell division?

Back

Kinetochores are protein structures on the centromere of chromosomes that attach to spindle fibers to facilitate the movement of chromosomes during cell division.

Front

What is the significance of cell signaling pathways?

Back

Cell signaling pathways are crucial for communication between cells, allowing them to respond to environmental changes and coordinate functions.