Unit 4B Review

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 checkpoint ensures all microtubules are attached to kinetochores?

Back

The M checkpoint (metaphase checkpoint) ensures all microtubules are properly attached to kinetochores before proceeding.

Front

What occurs during telophase of mitosis?

Back

During telophase, a nuclear envelope forms around separated chromosomes, marking the end of mitosis.

Front

What are sister chromatids?

Back

Sister chromatids are identical copies of a chromosome, joined together at the centromere, that are separated during meiosis II.

Front

What are homologous chromosomes?

Back

Homologous chromosomes are pairs of chromosomes, one from each parent, that are similar in shape, size, and genetic content.

Front

What is the function of the G1 checkpoint?

Back

The G1 checkpoint assesses cell size, DNA integrity, and nutrient availability before the cell enters the S phase.

Front

What happens during anaphase?

Back

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

Front

What is the significance of the S phase in the cell cycle?

Back

The S phase is when DNA replication occurs, resulting in two identical sets of chromosomes.

Front

What is the role of kinetochores?

Back

Kinetochores are protein structures on the chromosome that attach to spindle fibers during cell division.

Front

What is the difference between mitosis and meiosis?

Back

Mitosis results in two identical daughter cells, while meiosis produces four genetically diverse gametes.