MP Board · Class 9 · Science · The Fundamental Unit of LifeThe plasma membrane is described as selectively permeable because:
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Total Attempts: 6
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Step-by-Step Solution
The plasma membrane allows the entry and exit of some materials in cells while preventing the movement of other materials, hence it is called a selectively permeable membrane.
Detailed Options Breakdown
Option : It allows all substances to pass through freely
Incorrect choice. This distractor represents a common misunderstanding of the core principles of The Fundamental Unit of Life.
Option 1: It prevents all substances from entering
Incorrect choice. This distractor represents a common misunderstanding of the core principles of The Fundamental Unit of Life.
Option 2: It permits the entry and exit of some specific materials (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 3: It is made exclusively of proteins
Incorrect choice. This distractor represents a common misunderstanding of the core principles of The Fundamental Unit of Life.
💡 Study Guide: This question tests core syllabus concepts from The Fundamental Unit of Life. For formulas, key summaries, and mock exam reference guides, read the full The Fundamental Unit of Life Revision Notes.