NECO 2004 Biology · Question 27
The plant cell is different from an animal cell because it has
Options
- A.cellulose cell-wall
- B.cytoplasmic content
- C.centriole
- D.mitochondria
- E.nucleus
Answer: A. cellulose cell-wall
Explanation written with AI and checked against the answer key
Step 1: Analyze the question The question asks for a feature found in plant cells that distinguishes them from animal cells.
Step 2: Explain the concept Plant and animal cells are both eukaryotic, so they share many structures:
- Cytoplasm: present in both
- Mitochondria: present in both (for respiration)
- Nucleus: present in both (controls cell activities)
The main differences are:
| Feature | Plant cell | Animal cell | |---|---|---| | Cell wall | Present (made of cellulose) | Absent | | Chloroplasts | Present | Absent | | Large central vacuole | Present | Absent or small | | Centrioles | Usually absent in higher plants | Present | | Stored food | Starch | Glycogen |
Step 3: Evaluate each option
- A. Cellulose cell wall: Only plant cells have this. It gives the cell shape, support, and protection. This is correct.
- B. Cytoplasmic content: Both cell types have cytoplasm.
- C. Centriole: Found in animal cells, and absent in higher plants. This is the opposite of what the question asks.
- D. Mitochondria: Both cell types have them.
- E. Nucleus: Both cell types have it.
Step 4: Answer The correct option is A. cellulose cell-wall.
Exam tip: Remember the plant cell's "big three" unique features: cell wall, chloroplasts, large vacuole. If an option lists any of these, it is usually the answer to a "plant vs animal cell" question. Centrioles are the trap here, because they belong to animal cells.
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