Question 1

What are the main stages of cell division in the IB DP Biology curriculum?

Accepted Answer

In the IB DP Biology curriculum, cell division is primarily discussed in terms of mitosis and meiosis. Mitosis consists of stages such as prophase, metaphase, anaphase, and telophase, followed by cytokinesis. Meiosis involves two rounds of division, meiosis I and meiosis II, each with similar stages to mitosis but resulting in four genetically distinct haploid cells.

Question 2

How does mitosis differ from meiosis in cell division?

Accepted Answer

Mitosis and meiosis are both processes of cell division, but they serve different purposes. Mitosis results in two identical diploid daughter cells and is used for growth and repair. Meiosis, on the other hand, produces four genetically diverse haploid cells and is essential for sexual reproduction. This diversity is achieved through processes like crossing over and independent assortment during meiosis.

Question 3

Why is cell division important in living organisms, according to IB DP Biology?

Accepted Answer

Cell division is crucial for growth, development, and repair in living organisms. In the IB DP Biology curriculum, it is emphasized that mitosis allows for the replacement of damaged or dead cells and contributes to organismal growth. Meiosis is vital for genetic diversity and the continuation of species through sexual reproduction.

Question 4

What role do checkpoints play in the cell cycle?

Accepted Answer

Checkpoints in the cell cycle are critical for ensuring that cells divide correctly and at the appropriate time. In IB DP Biology, students learn that these checkpoints, located at G1, G2, and M phases, help prevent errors by assessing whether the cell is ready to proceed to the next stage. They ensure DNA is replicated correctly and that any damage is repaired before division.

Question 5

How does cancer relate to cell division?

Accepted Answer

Cancer is directly related to cell division as it involves uncontrolled cell proliferation. In the IB DP Biology curriculum, students explore how mutations in genes that regulate the cell cycle can lead to cancer. These mutations can result in the bypassing of normal checkpoints, leading to the formation of tumors and the spread of cancerous cells.

Cell division

Learn this Topic

Short Study Notes in the form of Slides

Study Notes & Exam Tips

Past paper style quiz

Cell division — frequently asked questions