SOLUTION: Prokaryotic eukaryotic cells worksheet - Studypool - Free Printable

Prokaryotic Cell Labeling and Function Explanation

Below is the correct labeling of the prokaryotic cell diagram and a brief explanation of the function of each structure.

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#### ✔ Correct Labels for the Diagram:

From top to bottom (based on typical diagrams):

1. Capsule – Outermost layer, often slimy.
2. Cell Wall – Rigid layer beneath the capsule.
3. Cell Membrane – Inner boundary of the cell.
4. Pili – Hair-like structures used for attachment.
5. Flagella – Long whip-like structure for movement.
6. Cytoplasm – Gel-like substance inside the cell.
7. Ribosomes – Small dots scattered in cytoplasm.
8. Nucleoid Region – Area where DNA is located (no membrane).
9. Plasmid – Small circular DNA molecule (often shown as a small loop near the nucleoid).

> 🔎 *Note: The order depends on the lines pointing to the parts. In most standard diagrams:*
>
> - Top line: Capsule
> - Second from top: Cell Wall
> - Third: Cell Membrane
> - Fourth: Pili (shorter projections)
> - Fifth: Flagella (long, curved tail)
> - Sixth: Cytoplasm (the whole interior)
> - Seventh: Ribosomes (tiny dots)
> - Eighth: Nucleoid Region (tangled DNA)
> - Ninth: Plasmid (small circle near DNA)

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🧬 Functions of Each Structure:

| Structure | Function |
|------------------------|-------------|
| Cell Membrane | Controls the movement of substances in and out of the cell; involved in cellular respiration and transport. |
| Cell Wall | Provides structural support and protection; maintains cell shape and prevents bursting in hypotonic environments. |
| Capsule | Protects the cell from immune system attacks and helps in adherence to surfaces. |
| Pili | Used for attachment to surfaces or other cells; some help in conjugation (transfer of genetic material). |
| Plasmid | Small, circular DNA molecules that carry extra genes (e.g., antibiotic resistance); can be transferred between bacteria. |
| Flagella | Used for locomotion; enables the cell to move through liquid environments. |
| Nucleoid Region | Contains the bacterial chromosome (DNA); site of DNA replication and transcription; no nuclear membrane. |
| Ribosomes | Sites of protein synthesis (translation); make proteins needed by the cell. |
| Cytoplasm | Gel-like matrix where metabolic reactions occur; contains all organelles and molecules necessary for life. |

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✔ Final Answer Summary:

Labels (from top to bottom):
1. Capsule
2. Cell Wall
3. Cell Membrane
4. Pili
5. Flagella
6. Cytoplasm
7. Ribosomes
8. Nucleoid Region
9. Plasmid

Each label corresponds to the part pointed to by the lines in the diagram.

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