Cell biology worksheet for labeling parts of animal and plant cells and identifying their functions.

Let’s work through this step by step.

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Part 1: Label the cell parts in the diagrams

We have two diagrams: Animal Cell and Plant Cell. Each has numbered boxes pointing to structures. We need to label them correctly.

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Animal Cell (Diagram 1):

Looking at the diagram:

- Box 1 points to the large dark circle inside — that’s the Nucleus.
- Box 2 points to the outer boundary of the cell — that’s the Cell surface membrane.
- Box 3 points to the jelly-like stuff filling the cell — that’s the Cytoplasm.
- Box 4 points to the small oval structures with lines inside — those are Mitochondria.

✔ So for Animal Cell:
1. Nucleus
2. Cell surface membrane
3. Cytoplasm
4. Mitochondria

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Plant Cell (Diagram 2):

This one has more parts.

- Box 1 points to the large dark circle — again, Nucleus.
- Box 2 points to the thick outer layer — that’s the Cell wall.
- Box 3 points to the thin line just inside the cell wall — that’s the Cell surface membrane.
- Box 4 points to the green oval structures — those are Chloroplasts.
- Box 5 points to the jelly-like material — Cytoplasm.
- Box 6 points to the big empty-looking space — that’s the Vacuole.
- Box 7 points to the small oval with lines — Mitochondria.

✔ So for Plant Cell:
1. Nucleus
2. Cell wall
3. Cell surface membrane
4. Chloroplast
5. Cytoplasm
6. Vacuole
7. Mitochondria

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Part 2: Complete the table and shade green structures only found in plant cells

The table lists:

| Cell Structure | Function (job) |
|----------------------|------------------------------------------|
| Nucleus | Controls the cell; holds DNA |
| Cytoplasm | Where chemical reactions happen |
| Cell surface membrane| Controls what enters and leaves the cell |
| Mitochondria | Releases energy for the cell |
| Cell wall | Supports and protects the plant cell |
| Chloroplast | Makes food using sunlight (photosynthesis)|
| Vacuole | Stores water, nutrients, waste |

Now, which of these are ONLY in plant cells?

→ Cell wall — yes, only plants have it.
→ Chloroplast — yes, only plants (and some algae) have them.
→ Vacuole — animal cells have small vacuoles, but the large central vacuole is typical of plant cells. In school biology, we usually say “vacuole” refers to the big one in plants, so it’s often listed as plant-only for simplicity.

But let’s be precise:
In many curricula (like GCSE or middle school), they teach that cell wall, chloroplast, and large vacuole are plant-only.

So we’ll shade:
- Cell wall
- Chloroplast
- Vacuole

*(Note: Some teachers may argue vacuoles exist in animal cells too — but since the diagram shows a large central vacuole and the question says “structures which are only found in plant cells”, and given the context of this worksheet, it’s safe to include vacuole as plant-only here.)*

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Final Answer:

Animal Cell Labels:
1. Nucleus
2. Cell surface membrane
3. Cytoplasm
4. Mitochondria

Plant Cell Labels:
1. Nucleus
2. Cell wall
3. Cell surface membrane
4. Chloroplast
5. Cytoplasm
6. Vacuole
7. Mitochondria

Table Functions:
- Nucleus: Controls the cell; contains genetic material (DNA)
- Cytoplasm: Site of chemical reactions; holds organelles
- Cell surface membrane: Controls movement of substances in/out of cell
- Mitochondria: Produces energy (ATP) for the cell
- Cell wall: Provides strength and support (plant only)
- Chloroplast: Carries out photosynthesis (plant only)
- Vacuole: Stores water, nutrients, and waste (large central vacuole in plants)

Shade green (plant-only structures):
Cell wall, Chloroplast, Vacuole