Unit 4: Cell Cycle and DNA Replication

Front

What is the cell cycle?

Back

The cell cycle is the series of events that take place in a cell leading to its division and duplication (replication). It consists of phases: G1, S, G2, and M (mitosis).

Front

What occurs during mitosis?

Back

Mitosis is the process where a single cell divides into two identical daughter cells, ensuring that each daughter cell receives an exact copy of the parent cell's DNA.

Front

What is cytokinesis?

Back

Cytokinesis is the final stage of the cell cycle where the cytoplasm of a parental cell is divided into two daughter cells, completing cell division.

Front

What is the role of checkpoints in the cell cycle?

Back

Checkpoints are regulatory pathways that ensure the cell cycle progresses only when certain conditions are met, preventing errors such as DNA damage or incomplete replication.

Front

What is DNA replication?

Back

DNA replication is the process by which a cell makes an exact copy of its DNA, allowing genetic information to be passed on to daughter cells.

Front

What are the nitrogen base pairs in DNA?

Back

In DNA, adenine (A) pairs with thymine (T) and guanine (G) pairs with cytosine (C).

Front

What happens during the G1 phase of the cell cycle?

Back

During the G1 phase, the cell grows and synthesizes proteins necessary for DNA replication, preparing for the next phase.

Front

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

Back

The S phase is where DNA replication occurs, resulting in the duplication of chromosomes, which is essential for cell division.

Front

What is the G2 phase?

Back

The G2 phase is the period after DNA replication where the cell continues to grow and prepares for mitosis, ensuring all DNA is correctly replicated.

Front

What is cancer in relation to the cell cycle?

Back

Cancer is characterized by uncontrolled cell division, often due to mutations that disrupt normal cell cycle regulation and checkpoints.