FBISE, NCP & NBF-aligned resources for Classes 9–12
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Biology Chapter 3 : Topic 4
Structural Advantages of Cells
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The presence of a cell wall in plant cells mainly provides:
Reasoning: The cellulose cell wall gives plant cells strength, rigidity, and protection.
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Which structural feature helps plant cells maintain shape even in a hypotonic environment?
Reasoning: The large vacuole maintains turgor pressure, keeping the cell firm. Turgor pressure is the internal force of water pushing the plasma membrane against the plant cell wall.
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What is a structural advantage of the flexible cell membrane in animal cells?
Reasoning: The flexible membrane allows animal cells to change shape for movement and function.
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Why are plant cells better suited for standing upright?
Reasoning: Cell walls and water-filled vacuoles provide structural support.
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Which structural feature allows animal cells to form tissues like muscles and nerves?
Reasoning: Flexible membranes allow specialization and movement in animal tissues.
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The absence of a cell wall in animal cells is advantageous because it:
Reasoning: Lack of a rigid wall allows shape changes and movement.
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What is a key advantage of chloroplasts in plant cells?
Reasoning: Chloroplasts allow plants to make their own food using sunlight.
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Why do plant cells not burst easily in water compared to animal cells?
Reasoning: The cell wall prevents excessive expansion and bursting.
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The structural advantage of a large central vacuole is mainly related to:
Reasoning: It stores water and maintains turgor pressure for support.
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Animal cells can form complex shapes like neurons due to:
Reasoning: Flexible membranes allow elongation and specialization.
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Which feature makes plant cells less mobile but structurally stronger?
Reasoning: The rigid cell wall increases strength but limits movement.
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Structural advantage of mitochondria in both plant and animal cells is:
Reasoning: Mitochondria generate ATP, essential for cell functions.
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Why are animal cells more adaptable in forming organs and tissues?
Reasoning: Absence of rigid cell wall allows diverse shapes and functions.
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A plant cell becomes firm when turgid because of:
Reasoning: Water entry into vacuole creates turgor pressure.
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The main structural advantage of animal cells is their ability to:
Reasoning: Flexibility allows locomotion, engulfing food, and specialization.
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In a labelled animal-cell diagram, A indicates a lysosome, B a mitochondrion, C rough endoplasmic reticulum, and D a centriole. Which labelled organelle is made of microtubules?
Reasoning: Label D points to the centrioles, which are cylindrical organelles composed of microtubules arranged in a 9 × 3 triplet pattern that organize spindle fibers during cell division.
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