Cell Organelles Worksheet KEY | PDF | Cell (Biology) | Cell Membrane - Free Printable
Educational worksheet: Cell Organelles Worksheet KEY | PDF | Cell (Biology) | Cell Membrane. Download and print for classroom or home learning activities.
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Step-by-step solution for: Cell Organelles Worksheet KEY | PDF | Cell (Biology) | Cell Membrane
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Show Answer Key & Explanations
Step-by-step solution for: Cell Organelles Worksheet KEY | PDF | Cell (Biology) | Cell Membrane
You’ve uploaded a Cell Organelles Worksheet that asks you to match the structure/function descriptions in the left column with the correct cell part/organelle in the right column. The worksheet has already been filled out with red text — likely by a student or teacher — and your request is to solve the problem and explain the solution.
Let’s go through each row, verify the correctness of the answer, and provide a clear explanation for each cell organelle’s function.
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> Explanation: Vacuoles are membrane-bound sacs that store water, ions, nutrients, and waste products. In plant cells, the central vacuole is especially large and helps maintain turgor pressure.
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> Explanation: This is slightly misleading. *Grana* (singular: granum) are stacks of thylakoids found *inside* chloroplasts. Chloroplasts are found in plants and some protists, not “plants only” exclusively — but mostly associated with plants. So while “chloroplasts” is correct, specifying “grana” clarifies the structure. ✔️ Acceptable.
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> Explanation: Ribosomes are the molecular machines that read mRNA and assemble amino acids into proteins. They can be free in the cytoplasm or attached to the rough ER.
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> Explanation: Vesicles are small membrane-bound sacs that transport materials (like proteins, lipids, or waste) between organelles (e.g., from ER to Golgi) or to the plasma membrane.
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> Explanation: The cytoplasm is the gel-like substance filling the cell, surrounding organelles. It contains dissolved ions, enzymes, and other molecules necessary for cellular processes.
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> Explanation: The nucleus houses the cell’s DNA and controls gene expression, replication, and overall cellular activity via instructions sent to ribosomes.
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> Explanation: Chloroplasts contain chlorophyll, which absorbs light energy for photosynthesis. They are unique to plants and algae.
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> Explanation: Lysosomes contain digestive enzymes that break down macromolecules, old organelles, and pathogens. Peroxisomes also break down fatty acids and detoxify substances — so both can be involved in digestion/degradation. ✔️ Good dual answer.
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> Explanation: These “bumps” are ribosomes attached to the rough ER. They synthesize proteins destined for secretion or insertion into membranes.
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> Explanation: Vesicles serve as temporary storage and transport containers for various substances — including enzymes, waste, and nutrients.
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> Explanation: The cell wall provides structural support and protection. It’s made of cellulose in plants, chitin in fungi, and peptidoglycan in bacteria.
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> Explanation: Mitochondria produce ATP (adenosine triphosphate) via cellular respiration — the primary energy currency of the cell.
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> Explanation: The Golgi modifies, sorts, and packages proteins received from the ER into vesicles for delivery to their final destinations (including outside the cell).
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> Explanation: The smooth endoplasmic reticulum synthesizes lipids (including phospholipids and steroids), detoxifies drugs, and stores calcium ions.
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> Explanation: The nucleolus (inside the nucleus) assembles ribosomal RNA and combines it with proteins to form ribosomal subunits.
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> Explanation: Also called the cell membrane, it regulates what enters and exits the cell, maintaining homeostasis and protecting the cell’s interior.
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> Explanation: The cytoskeleton is a network of protein filaments (microtubules, microfilaments, intermediate filaments) that maintains cell shape, enables movement, and aids in intracellular transport.
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## 📌 Final Notes:
- All answers provided in red are correct.
- Some answers (like #2 and #8) have minor nuances but are acceptable at the middle/high school level.
- The worksheet allows organelles to be used more than once — and indeed, ribosomes, vesicles, and nucleus/nucleolus appear multiple times appropriately.
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✔ Conclusion: The completed worksheet is accurate and demonstrates a solid understanding of basic cell organelle functions. Great job!
If you’re reviewing this as a student, you’ve got it right! If you’re a teacher, this is a well-answered assignment. Let me know if you’d like a printable version or flashcards for review!
Let’s go through each row, verify the correctness of the answer, and provide a clear explanation for each cell organelle’s function.
---
✔ 1. Stores material within the cell → Vacuole
> Explanation: Vacuoles are membrane-bound sacs that store water, ions, nutrients, and waste products. In plant cells, the central vacuole is especially large and helps maintain turgor pressure.
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✔ 2. Closely stacked, flattened sacs (plants only) → Chloroplasts (grana)
> Explanation: This is slightly misleading. *Grana* (singular: granum) are stacks of thylakoids found *inside* chloroplasts. Chloroplasts are found in plants and some protists, not “plants only” exclusively — but mostly associated with plants. So while “chloroplasts” is correct, specifying “grana” clarifies the structure. ✔️ Acceptable.
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✔ 3. The sites of protein synthesis → Ribosome
> Explanation: Ribosomes are the molecular machines that read mRNA and assemble amino acids into proteins. They can be free in the cytoplasm or attached to the rough ER.
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✔ 4. Transports materials within the cell → Vesicles
> Explanation: Vesicles are small membrane-bound sacs that transport materials (like proteins, lipids, or waste) between organelles (e.g., from ER to Golgi) or to the plasma membrane.
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✔ 5. Jelly-like substance in the cell → Cytoplasm
> Explanation: The cytoplasm is the gel-like substance filling the cell, surrounding organelles. It contains dissolved ions, enzymes, and other molecules necessary for cellular processes.
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✔ 6. Organelle that manages or controls all the cell functions in a eukaryotic cell → Nucleus
> Explanation: The nucleus houses the cell’s DNA and controls gene expression, replication, and overall cellular activity via instructions sent to ribosomes.
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✔ 7. Contains chlorophyll, a green pigment that traps energy from sunlight and gives plants their green color → Chloroplasts
> Explanation: Chloroplasts contain chlorophyll, which absorbs light energy for photosynthesis. They are unique to plants and algae.
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✔ 8. Digests excess or worn-out cell parts, food particles and invading viruses or bacteria → Lysosome/Peroxisome
> Explanation: Lysosomes contain digestive enzymes that break down macromolecules, old organelles, and pathogens. Peroxisomes also break down fatty acids and detoxify substances — so both can be involved in digestion/degradation. ✔️ Good dual answer.
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✔ 9. Small bumps located on portions of the endoplasmic reticulum → Ribosome
> Explanation: These “bumps” are ribosomes attached to the rough ER. They synthesize proteins destined for secretion or insertion into membranes.
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✔ 10. Provides temporary storage of food, enzymes and waste products → Vesicles
> Explanation: Vesicles serve as temporary storage and transport containers for various substances — including enzymes, waste, and nutrients.
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✔ 11. Firm, protective structure that gives the cell its shape in plants, fungi, most bacteria and some protists → Cell Wall
> Explanation: The cell wall provides structural support and protection. It’s made of cellulose in plants, chitin in fungi, and peptidoglycan in bacteria.
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✔ 12. Produces a usable form of energy for the cell → Mitochondrion
> Explanation: Mitochondria produce ATP (adenosine triphosphate) via cellular respiration — the primary energy currency of the cell.
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✔ 13. Packages proteins for transport out of the cell → Golgi Apparatus
> Explanation: The Golgi modifies, sorts, and packages proteins received from the ER into vesicles for delivery to their final destinations (including outside the cell).
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✔ 14. Produces lipids → Smooth ER
> Explanation: The smooth endoplasmic reticulum synthesizes lipids (including phospholipids and steroids), detoxifies drugs, and stores calcium ions.
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✔ 15. Site where ribosomes are made → Nucleolus
> Explanation: The nucleolus (inside the nucleus) assembles ribosomal RNA and combines it with proteins to form ribosomal subunits.
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✔ 16. The membrane surrounding the cell → Plasma Membrane
> Explanation: Also called the cell membrane, it regulates what enters and exits the cell, maintaining homeostasis and protecting the cell’s interior.
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✔ 17. Provides support for the cell → Cytoskeleton
> Explanation: The cytoskeleton is a network of protein filaments (microtubules, microfilaments, intermediate filaments) that maintains cell shape, enables movement, and aids in intracellular transport.
---
## 📌 Final Notes:
- All answers provided in red are correct.
- Some answers (like #2 and #8) have minor nuances but are acceptable at the middle/high school level.
- The worksheet allows organelles to be used more than once — and indeed, ribosomes, vesicles, and nucleus/nucleolus appear multiple times appropriately.
---
✔ Conclusion: The completed worksheet is accurate and demonstrates a solid understanding of basic cell organelle functions. Great job!
If you’re reviewing this as a student, you’ve got it right! If you’re a teacher, this is a well-answered assignment. Let me know if you’d like a printable version or flashcards for review!
Parent Tip: Review the logic above to help your child master the concept of cell organelles and their functions worksheet answer key.
