Plant Cell Worksheet: Label and describe the functions of plant cell components.

Here is the step-by-step solution to label the plant cell and define the functions of its parts.

Step 1: Labeling the Cell Diagram (Numbers 1–13)

To solve this, we look at the shape and location of each organelle in the drawing:

* 7 points to the thick, outermost layer. This is the Cell Wall.
* 21 (which corresponds to arrow 8) points to the thin line just inside the wall. This is the Cell Membrane.
* 3 points to the jelly-like substance filling the cell. This is the Cytoplasm.
* 4 points to the very large empty-looking space in the middle. This is the Vacuole (specifically the central vacuole).
* 9 points to the large round structure containing genetic material. This is the Nucleus.
* 10 points to the small dark circle inside the nucleus. This is the Nucleolus.
* 1 points to the bean-shaped structures with folded lines inside. These are Mitochondria.
* 12 points to the oval structures containing stacks of discs (chlorophyll). These are Chloroplasts.
* 6 points to a stack of flattened sacs. This is the Golgi Body (or Golgi Apparatus).
* 2 points to the network of tubes connected to the nucleus that has dots on it. This is the Rough Endoplasmic Reticulum.
* 11 points to the smooth tubes near the Golgi body. This is the Smooth Endoplasmic Reticulum.
* 5 points to the tiny dots floating in the cytoplasm or on the ER. These are Ribosomes.
* 13 points to the internal framework/filaments holding the cell shape. This is the Cytoskeleton.

*(Note: Lysosomes are typically not prominent in mature plant cells, but if number 5 referred to a specific membrane-bound sac distinct from ribosomes, it would be a lysosome. However, based on standard diagrams, 5 represents Ribosomes).*

Step 2: Defining the Functions (Numbers 14–26)

Now we match the names to their jobs:

* Nucleus: The "brain" of the cell; controls activities and holds DNA.
* Endoplasmic Reticulum (ER): Transports materials; Rough ER makes proteins, Smooth ER makes lipids.
* Cell Wall: Provides rigid support and protection (only in plants/bacteria/fungi).
* Ribosome: The site where proteins are made.
* Cytoplasm: The jelly-like fluid that holds organelles in place.
* Nucleolus: Makes ribosomes inside the nucleus.
* Golgi Body: Packages and ships proteins out of the cell.
* Cell Membrane: Controls what enters and leaves the cell.
* Cytoskeleton: Gives the cell shape and helps it move.
* Lysosome: Breaks down waste and old cell parts (digestion).
* Mitochondria: The "powerhouse"; creates energy (ATP) through respiration.
* Vacuole: Stores water, nutrients, and waste; keeps the plant upright (turgor pressure).
* Chloroplast: Uses sunlight to make food (photosynthesis); contains chlorophyll.

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Final Answer:

Part 1: Diagram Labels
1. Mitochondria
2. Endoplasmic Reticulum (Rough)
3. Cytoplasm
4. Vacuole
5. Ribosome
6. Golgi Body
7. Cell Wall
8. Cell Membrane
9. Nucleus
10. Nucleolus
11. Endoplasmic Reticulum (Smooth)
12. Chloroplast
13. Cytoskeleton

Part 2: Functions of Cell Parts

| Cell Part | Function of Cell Part |
| :--- | :--- |
| 14. nucleus | Controls the cell's activities and contains DNA (genetic instructions). |
| 15. endoplasmic reticulum | Transports materials within the cell; synthesizes proteins (rough) and lipids (smooth). |
| 16. cell wall | Provides rigid structural support and protection for the plant cell. |
| 17. ribosome | Synthesizes (makes) proteins. |
| 18. cytoplasm | Jelly-like substance that fills the cell and supports/holds organelles in place. |
| 19. nucleolus | Produces ribosomes inside the nucleus. |
| 20. Golgi body | Modifies, sorts, and packages proteins for storage or transport out of the cell. |
| 21. cell membrane | Controls what substances enter and leave the cell (selectively permeable). |
| 22. cytoskeleton | Provides internal structure/shape to the cell and aids in movement. |
| 23. lysosome | Contains enzymes to break down waste, food, and worn-out cell parts. |
| 24. mitochondria | Converts nutrients into energy (ATP) for the cell to use ("powerhouse"). |
| 25. vacuole | Stores water, nutrients, and waste; maintains pressure to keep the plant upright. |
| 26. chloroplast | Captures light energy to perform photosynthesis and create food (glucose) for the plant. |