O Levels Biology (5090)•5090/11/O/N/20

Explanation
Identifying cell structures by position in plant cell diagram
Steps:
- Examine diagram: outermost rigid layer is 1 (protects cell).
- Identify next layer: thin boundary inside 1, regulating entry/exit, as 2.
- Locate inner fluid-filled region: contains organelles, labeled 3.
- Match to plant cell anatomy: wall outside membrane, cytoplasm inside.
Why D is correct:
- Plant cell structure defines cell wall as outermost (1), plasma membrane beneath it (2), and cytoplasm filling the interior (3).
Why the others are wrong:
- A: Misplaces cell wall as 2; it's always outermost in plants.
- B: Starts with membrane as 1; ignores external wall.
- C: Ends with membrane as 3; cytoplasm is innermost fluid.
Final answer: D
Topic: Cell structure and function
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