Table 2: Summary of Cellular Structures and their Functions
Summary table of cellular structures and their functions in animal and plant cells, including cytoplasm, nucleus, cell membrane, cell wall, mitochondria, plastids, Golgi bodies, centrosome, lysosomes, vacuoles, endoplasmic reticulum, and ribosomes.
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Step-by-step solution for: Class 7 Science Cell Structure and Function Chapter Notes
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Show Answer Key & Explanations
Step-by-step solution for: Class 7 Science Cell Structure and Function Chapter Notes
Actually, there is no “problem” to solve in the image you uploaded — it’s a reference table titled:
> Table 2: Summary of Cellular Structures and their Functions
This table lists 12 key cellular structures (organelles or components), indicating:
- In which type of cell they are found (Animal, Plant, or both),
- And their primary biological function.
---
Since there’s no explicit question or problem attached, I’ll assume you want one or more of the following:
1. An explanation of the table’s content
2. Clarification on any specific structure
3. Comparison between animal and plant cells based on this table
4. Correction of any inaccuracies (if any)
Let’s go through each!
---
## 🧬 1. Explanation of the Table
The table summarizes essential parts of eukaryotic cells (both animal and plant) and their roles. Here's a quick overview:
| Structure | Found In | Function |
|--------------------|------------------|--------------------------------------------------------------------------|
| Cytoplasm | Animal & Plant | Site of metabolic reactions; holds organelles |
| Nucleus | Animal & Plant | Controls cell activities; stores DNA (hereditary material) |
| Cell membrane | Animal & Plant | Selectively permeable barrier; controls entry/exit of substances |
| Cell wall | Plant only | Provides structural support and protection |
| Mitochondria | Animal & Plant | Produces ATP via cellular respiration (powerhouse of the cell) |
| Plastids | Plant only | Includes chloroplasts (photosynthesis), chromoplasts (pigments), leucoplasts (starch storage) |
| Golgi bodies | Animal & Plant | Modifies, sorts, packages proteins for secretion or transport |
| Centrosome | Animal only | Organizes microtubules during cell division (spindle formation) |
| Lysosomes | Mostly Animal | Contain digestive enzymes to break down waste, pathogens, damaged organelles |
| Vacuoles | Animal & Plant | Storage (water, ions, nutrients); large central vacuole in plants helps maintain turgor pressure |
| Endoplasmic Reticulum | Animal & Plant | Rough ER: protein synthesis; Smooth ER: lipid synthesis, detoxification |
| Ribosomes | Animal & Plant | Synthesize proteins (free in cytoplasm or bound to ER) |
---
## 🔍 2. Key Observations / Comparisons
| Feature | Animal Cell | Plant Cell |
|---------------------|-------------|------------|
| Cell Wall | ✘ No | ✔ Yes |
| Plastids | ✘ No | ✔ Yes |
| Centrosome | ✔ Yes | ✘ Usually absent (some lower plants may have it) |
| Lysosomes | ✔ Common | ⚠️ Rare or absent; vacuoles often perform similar functions |
| Large Central Vacuole | ✘ Small or multiple | ✔ One large vacuole |
> 💡 Note: While lysosomes are listed as “Generally in Animal,” some plant cells *do* have lysosome-like structures or use vacuoles for degradation — so this is a generalization.
---
## 🛠️ 3. Minor Corrections / Clarifications
Some entries could be slightly refined for accuracy:
- Golgi bodies: Their main role is modifying, sorting, and packaging proteins — not necessarily “formation of hormones.” Hormones are synthesized by specific cells (e.g., endocrine glands), often involving ER and Golgi, but Golgi doesn’t “form” them per se.
- Lysosomes: They don’t just destroy “damaged cells” — that’s more the job of the immune system or apoptosis. Lysosomes break down macromolecules, pathogens, and worn-out organelles inside the cell.
- Vacuoles: In plants, they’re crucial for turgor pressure (structural support), not just “store excess material.”
- Centrosome: Present in most animal cells, but absent in higher plants — instead, plants use other microtubule-organizing centers.
---
## 📝 Summary
This table serves as a quick-reference guide to compare and contrast organelles in animal vs. plant cells. It highlights:
- What structures are unique to each cell type
- What functions are shared
- How these structures contribute to cell survival and activity
It’s useful for students learning basic cell biology — especially for exams or revision.
---
## ❓ If You Had a Specific Question...
If your original task was something like:
> “Which structures are found only in plant cells?”
→ Answer: Cell wall, Plastids
> “Which organelle is responsible for energy production?”
→ Answer: Mitochondria
> “What is the function of ribosomes?”
→ Answer: Site of protein synthesis
> “Why do plant cells have a cell wall but animal cells don’t?”
→ Answer: Plants need rigid structure for support without skeletons; animals rely on internal skeletons and flexible membranes.
---
✔ Let me know if you’d like a printable version, flashcards, diagram labeling exercise, or quiz based on this table — I’m happy to help further!
> Table 2: Summary of Cellular Structures and their Functions
This table lists 12 key cellular structures (organelles or components), indicating:
- In which type of cell they are found (Animal, Plant, or both),
- And their primary biological function.
---
✔ So what can we do with this table?
Since there’s no explicit question or problem attached, I’ll assume you want one or more of the following:
1. An explanation of the table’s content
2. Clarification on any specific structure
3. Comparison between animal and plant cells based on this table
4. Correction of any inaccuracies (if any)
Let’s go through each!
---
## 🧬 1. Explanation of the Table
The table summarizes essential parts of eukaryotic cells (both animal and plant) and their roles. Here's a quick overview:
| Structure | Found In | Function |
|--------------------|------------------|--------------------------------------------------------------------------|
| Cytoplasm | Animal & Plant | Site of metabolic reactions; holds organelles |
| Nucleus | Animal & Plant | Controls cell activities; stores DNA (hereditary material) |
| Cell membrane | Animal & Plant | Selectively permeable barrier; controls entry/exit of substances |
| Cell wall | Plant only | Provides structural support and protection |
| Mitochondria | Animal & Plant | Produces ATP via cellular respiration (powerhouse of the cell) |
| Plastids | Plant only | Includes chloroplasts (photosynthesis), chromoplasts (pigments), leucoplasts (starch storage) |
| Golgi bodies | Animal & Plant | Modifies, sorts, packages proteins for secretion or transport |
| Centrosome | Animal only | Organizes microtubules during cell division (spindle formation) |
| Lysosomes | Mostly Animal | Contain digestive enzymes to break down waste, pathogens, damaged organelles |
| Vacuoles | Animal & Plant | Storage (water, ions, nutrients); large central vacuole in plants helps maintain turgor pressure |
| Endoplasmic Reticulum | Animal & Plant | Rough ER: protein synthesis; Smooth ER: lipid synthesis, detoxification |
| Ribosomes | Animal & Plant | Synthesize proteins (free in cytoplasm or bound to ER) |
---
## 🔍 2. Key Observations / Comparisons
➤ Differences Between Animal and Plant Cells (from this table):
| Feature | Animal Cell | Plant Cell |
|---------------------|-------------|------------|
| Cell Wall | ✘ No | ✔ Yes |
| Plastids | ✘ No | ✔ Yes |
| Centrosome | ✔ Yes | ✘ Usually absent (some lower plants may have it) |
| Lysosomes | ✔ Common | ⚠️ Rare or absent; vacuoles often perform similar functions |
| Large Central Vacuole | ✘ Small or multiple | ✔ One large vacuole |
> 💡 Note: While lysosomes are listed as “Generally in Animal,” some plant cells *do* have lysosome-like structures or use vacuoles for degradation — so this is a generalization.
---
## 🛠️ 3. Minor Corrections / Clarifications
Some entries could be slightly refined for accuracy:
- Golgi bodies: Their main role is modifying, sorting, and packaging proteins — not necessarily “formation of hormones.” Hormones are synthesized by specific cells (e.g., endocrine glands), often involving ER and Golgi, but Golgi doesn’t “form” them per se.
- Lysosomes: They don’t just destroy “damaged cells” — that’s more the job of the immune system or apoptosis. Lysosomes break down macromolecules, pathogens, and worn-out organelles inside the cell.
- Vacuoles: In plants, they’re crucial for turgor pressure (structural support), not just “store excess material.”
- Centrosome: Present in most animal cells, but absent in higher plants — instead, plants use other microtubule-organizing centers.
---
## 📝 Summary
This table serves as a quick-reference guide to compare and contrast organelles in animal vs. plant cells. It highlights:
- What structures are unique to each cell type
- What functions are shared
- How these structures contribute to cell survival and activity
It’s useful for students learning basic cell biology — especially for exams or revision.
---
## ❓ If You Had a Specific Question...
If your original task was something like:
> “Which structures are found only in plant cells?”
→ Answer: Cell wall, Plastids
> “Which organelle is responsible for energy production?”
→ Answer: Mitochondria
> “What is the function of ribosomes?”
→ Answer: Site of protein synthesis
> “Why do plant cells have a cell wall but animal cells don’t?”
→ Answer: Plants need rigid structure for support without skeletons; animals rely on internal skeletons and flexible membranes.
---
✔ Let me know if you’d like a printable version, flashcards, diagram labeling exercise, or quiz based on this table — I’m happy to help further!
Parent Tip: Review the logic above to help your child master the concept of 7th grade plant cell functions.