Why is it not possible to shorten the cell cycle?

Answer

### Step-by-Step Solution:

1. **Understanding the Cell Cycle**: The cell cycle is a series of events that take place in a cell leading to its division and duplication. It consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis).

2. **Inbuilt Program of the Cell Cycle**: The processes involved in the cell cycle are governed by an inbuilt program. This program ensures that each phase of the cell cycle occurs in a specific sequence and is completed before the next phase begins.

3. **DNA Replication**: One of the critical steps in the cell cycle is the replication of DNA during the S phase. This process is essential for ensuring that each daughter cell receives an exact copy of the genetic material.

4. **Organelle Duplication**: Along with DNA replication, the cell must also duplicate its organelles (like mitochondria and chloroplasts) to ensure that both daughter cells have the necessary components to function properly.

5. **Energy Storage**: The cell requires energy to carry out these processes. Energy storage and management are crucial to ensure that the cell has enough resources to complete the cell cycle.

6. **Fixed Time Requirement**: Each of these processes has a specific time requirement that cannot be shortened without risking the integrity and functionality of the daughter cells. If any phase is rushed, it could lead to incomplete DNA replication or insufficient organelle duplication.

7. **Conclusion**: Therefore, it is not possible to shorten the cell cycle because the processes involved are inbuilt and require a certain amount of time to ensure proper cell division and function.