Unit 4: Cell Cycle & Cell Communication Practice

Front

What is MPF and what role does Cyclin play in its activation?

Back

MPF stands for M-phase Promoting Factor. It becomes active when bound with Cyclin, triggering the process of mitosis.

Front

What phase of mitosis is characterized by chromosomes aligning single file along the equator of the cell?

Back

This phase is called Metaphase.

Front

What happens to a cancer cell with two mutated copies of p53 if the immune system fails to destroy it?

Back

The cancer cell is likely to undergo tumor development.

Front

During which phase of the cell cycle does a cell have the greatest quantity of DNA?

Back

A cell has the greatest quantity of DNA during the G2 phase.

Front

What is the primary function of p53 in the cell cycle?

Back

p53 is a tumor suppressor protein that regulates the cell cycle and prevents tumor formation.

Front

What occurs during Anaphase of mitosis?

Back

During Anaphase, sister chromatids are pulled apart to opposite poles of the cell.

Front

Define apoptosis and its significance in cell regulation.

Back

Apoptosis is programmed cell death, which is crucial for eliminating damaged or unnecessary cells.

Front

What is the role of checkpoints in the cell cycle?

Back

Checkpoints are regulatory mechanisms that ensure the proper progression of the cell cycle and prevent errors.

Front

What is the difference between G1 and G2 phases of the cell cycle?

Back

G1 is the first growth phase where the cell grows and synthesizes proteins, while G2 is the second growth phase where the cell prepares for mitosis.

Front

What is the significance of DNA replication during the S phase?

Back

DNA replication during the S phase ensures that each daughter cell receives an identical set of chromosomes.