A Level Biology Practice Exam

What does the cell cycle refer to?

1. A sequence of events leading to cell death

2. A highly ordered sequence of events resulting in cell division

3. A random assortment of cellular functions

4. A series of metabolic reactions

The correct answer is: A highly ordered sequence of events resulting in cell division

The cell cycle is defined as a highly ordered sequence of events that leads to cell division. This process is crucial for growth, development, and tissue repair in organisms. It consists of several stages, including interphase (where the cell grows and prepares for division) and the mitotic phase (where the actual division occurs). The structured nature of the cell cycle ensures that cells replicate their DNA accurately and distribute their genetic material evenly to daughter cells, maintaining proper function and genomic integrity. The other options do not accurately describe the cell cycle. For instance, while a sequence of events leading to cell death might occur, it does not encompass the broader context of the cell cycle, which primarily focuses on growth and division. Similarly, the notion of a random assortment of cellular functions does not reflect the systematic and regulated processes involved in the cell cycle. Finally, referring to the cell cycle as a series of metabolic reactions overlooks the specific focus on cell division and the phases that prepare a cell for this critical event.