Question

directions: read the following sections. after you have completed the reading, then answer the questions below. hmh science dimensions biology, unit 5, lesson 1, pages 222 - 224 1. describe what occurs during the cell cycle. 2. what are the two phases of the cell cycle? 3. what occurs during gap 1, synthesis, and gap 2 of the cell cycle? 4. according to figure 4 on page 224, which cell types have the shortest and longest life span? 5. explain the g zero (g₀) stage.

Explanation:

1. The cell cycle is a series of events that take place in a cell leading to its division and duplication (replication). It involves growth, DNA replication, and cell division.
2. The two phases of the cell cycle are the interphase (where the cell grows and replicates its DNA) and the mitotic (M) phase (where the cell divides).
3. During Gap 1 (G₁), the cell grows. In Synthesis (S), DNA is replicated. During Gap 2 (G₂), the cell prepares for division.
4. Without access to Figure 4, this cannot be accurately answered based on the given information.
5. The G Zero (G₀) stage is a resting phase where the cell has left the cycle and has stopped dividing. It may remain in this phase temporarily or permanently.

Answer:

1. The cell cycle is a series of events including growth, DNA replication, and cell division.
2. Interphase and mitotic (M) phase.
3. G₁: cell growth; S: DNA replication; G₂: preparation for division.
4. Cannot be answered without Figure 4.
5. A resting phase where the cell has left the cycle and stopped dividing.