What is the correct order of phases in the cell cycle?

• A. Growth phase 1, Mitosis, Cytokinesis, Growth phase 2
• B. Growth phase 2, S phase, Mitosis, Cytokinesis
• C. Growth phase 1, S phase, Growth phase 2, Mitosis
• D. Growth phase 1, S phase, Growth phase 2, Cytokinesis

Answer: (C)

The correct sequence of phases in the cell cycle is essential for understanding how cells grow, replicate their DNA, and divide. The cell cycle is typically divided into several key phases: Growth phase 1 (G1), the S phase (where DNA synthesis occurs), Growth phase 2 (G2), and finally the M phase, which includes both Mitosis and Cytokinesis.

In the correct order represented by the chosen answer, starting with Growth phase 1, cells are actively growing and preparing for DNA synthesis. Following this, in the S phase, DNA replication occurs, resulting in the duplication of the genetic material. Next, during Growth phase 2, the cell continues to grow and prepares for division by producing proteins and organelles needed for mitosis. The final step is Mitosis, where the cell's chromosomes are separated and divided, followed by Cytokinesis, which is the physical separation into two daughter cells.

This sequence ensures that the cell is adequately prepared at each stage before moving to the next, which is crucial for proper cell function and organism development. Hence, the correct answer is an accurate reflection of the progression through the cell cycle phases.