SOLUTION: Cells alive cycleworksheet2 - Studypool - Free Printable

It looks like you've uploaded a "CELLS alive! - Cell Cycle Worksheet" that includes a diagram of the cell cycle with numbered descriptions and labels pointing to different phases. The goal is likely to match the correct description to each phase of the cell cycle based on the image.

Let’s go through the cell cycle phases and match them correctly to the numbered statements provided in the worksheet.

---

🔁 Overview of the Cell Cycle Phases:

1. G₁ Phase (Gap 1) – Cell growth, protein synthesis, preparation for DNA replication.
2. S Phase (Synthesis) – DNA replication occurs; chromosomes are duplicated.
3. G₂ Phase (Gap 2) – Preparation for mitosis; checks if DNA is properly replicated.
4. M Phase (Mitosis) – Nuclear division (mitosis) and cytoplasmic division (cytokinesis).
5. G₀ Phase – Resting state; cells may exit the cycle temporarily or permanently.

---

Now, let's match the numbers from the worksheet to the correct phase and explanation.

---

✔ Matching the Numbers:

#### 1.) "The cells increase in size and produce RNA and synthesize protein. It ensures that cells are ready for DNA Synthesis."
- This describes G₁ Phase.
- ✔ Correctly matches G₁ (the green section).

> ✔️ So, #1 → G₁ Phase

---

#### 2.) "Cell may remain metabolically active but quit dividing in Go. This stage can be temporary or permanent."
- This refers to G₀ Phase.
- Cells exit the cycle and enter a resting state.
- ✔ Matches G₀ (purple loop outside the main cycle).

> ✔️ So, #2 → G₀ Phase

---

#### 3.) "Cells decide whether to proceed to S Phase (DNA Synthesis) or not."
- This is the G₁ checkpoint, which occurs at the end of G₁.
- The decision point before entering S phase.
- ✔ This is part of G₁ Phase.

> ✔️ So, #3 → G₁ Checkpoint (end of G₁)

---

#### 4.) "The cell passes through the G2 checkpoint, it then proceeds to S phase."
- ✘ This is incorrect as written.
- G₂ checkpoint comes after S phase, before M phase.
- The cell goes: G₁ → S → G₂ → M
- So after G₂, it proceeds to M, not S.
- This statement has a mistake: it says "proceeds to S phase", but should be M phase.

> ✘ Correction: Should say “...then proceeds to M phase.”

> ✔️ So, #4 → G₂ Phase, but the description is flawed.

---

#### 5.) "DNA replication takes place. After the DNA is copied, it then proceeds to G2."
- This clearly describes the S Phase.
- DNA is duplicated during this phase.
- ✔ Matches S Phase (blue section).

> ✔️ So, #5 → S Phase

---

#### 6.) "This is where cells organize and condense the genetic material and prepares to divide."
- This describes Prophase, which is part of M Phase.
- Chromatin condenses into chromosomes.
- ✔ Matches M Phase (red section).

> ✔️ So, #6 → M Phase

---

#### 7.) "G2 checkpoint ensures that all chromosomes have been replicated and DNA is not damaged before it enters mitosis."
- This is the G₂ checkpoint, which happens at the end of G₂.
- Ensures DNA replication is complete and no damage.
- ✔ Matches G₂ Phase.

> ✔️ So, #7 → G₂ Phase

---

#### 8.) "Resting state"
- This refers to G₀ Phase.
- A non-dividing state, though cells may still be metabolically active.
- ✔ Matches G₀ Phase.

> ✔️ So, #8 → G₀ Phase

---

#### 9.) "M checkpoint ensures that all cell is ready to complete cell division."
- This is the M checkpoint (metaphase checkpoint).
- Occurs during mitosis, specifically metaphase, to ensure chromosomes are properly attached to spindle fibers.
- ✔ Part of M Phase.

> ✔️ So, #9 → M Phase

---

#### 10.) "This is where the cell actually partitions the two copies of the genetic material into the two daughter cells."
- This describes mitosis and cytokinesis.
- The separation of duplicated chromosomes into two daughter cells.
- ✔ Matches M Phase.

> ✔️ So, #10 → M Phase

---

🔄 Final Answer Summary:

| Number | Description | Phase |
|-------|-------------|--------|
| 1 | Growth, RNA/protein synthesis, prep for DNA synthesis | G₁ |
| 2 | Resting state, not dividing | G₀ |
| 3 | Decision to enter S phase | G₁ checkpoint |
| 4 | Passes G₂ checkpoint, proceeds to S phase *(error: should be M)* | G₂ (but description is wrong) |
| 5 | DNA replication occurs | S |
| 6 | Organize and condense genetic material | M |
| 7 | G₂ checkpoint ensures DNA is intact | G₂ |
| 8 | Resting state | G₀ |
| 9 | M checkpoint ensures readiness for division | M |
| 10 | Partitioning of genetic material into daughter cells | M |

---

✔ Key Takeaways:

- The cell cycle consists of: G₁ → S → G₂ → M → G₀ (optional).
- Checkpoints (G₁, G₂, M) ensure accuracy before proceeding.
- G₀ is an exit from the cycle.
- M phase includes both nuclear division (mitosis) and cytoplasmic division (cytokinesis).

---

⚠️ Note:

There is a mistake in #4:
> “The cell passes through the G2 checkpoint, it then proceeds to S phase.”
✘ Incorrect — it should be M phase, not S phase.

---

If this is a worksheet, you might want to correct #4 to:
> “The cell passes through the G2 checkpoint, it then proceeds to M phase.”

Let me know if you'd like a corrected version of the worksheet or a printable answer key!