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Biology Chapter 3 : Topic 2
Plant and Animal Cells
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Which structure is present in plant cells but absent in animal cells?
Reasoning: The cell wall is a rigid outer layer found only in plant cells, providing support and shape.
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The main function of the large central vacuole in plant cells is to:
Reasoning: Plant cells have a large central vacuole that stores water and maintains cell rigidity.
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Why are animal cells more flexible in shape than plant cells?
Reasoning: Animal cells lack a rigid cell wall, making them flexible in shape.
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Which organelle is present in plant cells but usually absent in animal cells?
Reasoning: Chloroplasts are found in plant cells and are responsible for photosynthesis.
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What is a common feature of both plant and animal cells?
Reasoning: Both plant and animal cells are eukaryotic and contain a nucleus.
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The shape of plant cells is generally fixed due to the presence of:
Reasoning: The rigid cell wall maintains a definite shape in plant cells.
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Which of the following is found in animal cells but not in most plant cells?
Reasoning: Centrioles are typically present in animal cells and help in cell division.
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The cytoplasm in both plant and animal cells mainly functions to:
Reasoning: Cytoplasm is the site of most biochemical and metabolic activities.
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Which statement best describes plant cells compared to animal cells?
Reasoning: Plant cells are characterized by cell walls and chloroplasts.
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Why do plant cells appear more rigid under a microscope?
Reasoning: The cell wall and water-filled vacuole create turgor pressure, making plant cells rigid.
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Which organelle is responsible for photosynthesis in plant cells?
Reasoning: Chloroplast contains chlorophyll and carries out photosynthesis.
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In both plant and animal cells, energy production mainly occurs in:
Reasoning: Mitochondria are the site of cellular respiration in both cell types.
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The absence of chloroplast in animal cells indicates that they:
Reasoning: Animal cells cannot perform photosynthesis because they lack chloroplasts.
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Which structure controls movement of substances into and out of both plant and animal cells?
Reasoning: The cell membrane is selectively permeable in both plant and animal cells.
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A plant cell becomes flaccid when:
Reasoning: Loss of water reduces vacuole size, causing loss of turgidity.
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A plant cell initially has its contents pressed against the cell wall. After being placed in a solution, its vacuole shrinks and the cell membrane pulls away from the wall. The solution was:
Reasoning: The cell has undergone plasmolysis, where the vacuole shrinks and the cell membrane pulls away from the cell wall because water moved out of the cell by osmosis into a solution with a higher solute concentration.
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