AP Biology - Cell Cycle

Front

What is the role of the spindle during mitosis?

Back

It helps separate the chromosomes.

Front

How does the concentration of cyclin dependent kinases (Cdk) change as the cell proceeds through the cell cycle?

Back

Cdk concentration remains constant.

Front

Which of these phases does not have a checkpoint?

Back

S/G2

Front

Why do cells such as neurons divide very rarely?

Back

They have entered G0.

Front

What is the purpose of the G1 checkpoint in the cell cycle?

Back

To assess cell size, DNA integrity, and nutrient availability before DNA replication.

Front

What occurs during the S phase of the cell cycle?

Back

DNA replication takes place, resulting in two sister chromatids for each chromosome.

Front

What is the function of cyclins in the cell cycle?

Back

Cyclins regulate the progression of the cell cycle by activating cyclin-dependent kinases (Cdks).

Front

What is the significance of the G2 checkpoint?

Back

It ensures that DNA has been replicated correctly and that the cell is ready to enter mitosis.

Front

What happens during prophase of mitosis?

Back

Chromatin condenses into visible chromosomes, the nuclear envelope breaks down, and the spindle apparatus begins to form.

Front

What is the role of the metaphase plate during mitosis?

Back

It is the imaginary plane where chromosomes align before being separated into daughter cells.