The Fundamental Unit of Life — Practice Quiz
Gujarat Board · Class 9 · Science
Try a 4-question quiz on The Fundamental Unit of Life for Gujarat Board Class 9 Science: tap an answer to check it and see why.
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Quick Quiz: The Fundamental Unit of Life
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Who was the first person to observe and name cells?
What is the basic structural and functional unit of life?
The plasma membrane is described as selectively permeable. What does this mean?
Which process allows gases like oxygen and carbon dioxide to move across the cell membrane?
Sample Questions
Which of the following are present in ALL cells? (Select all correct answers)
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Plasma membrane, Cytoplasm, Genetic material
All cells have a plasma membrane to separate the cell contents from the environment, cytoplasm as the fluid content inside, and genetic material (DNA) for heredity. Cell wall is only in plant cells, fungi, and bacteria. Nucleus is only in eukaryotic cells.
What is osmosis?
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Movement of water through a selectively permeable membrane
Osmosis is specifically the movement of water molecules through a selectively permeable membrane from a region of high water concentration to low water concentration. It is a special case of diffusion involving only water.
Which of the following solutions would cause a cell to swell? (Select all correct answers)
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Hypotonic solution, Dilute solution
Hypotonic solutions have higher water concentration than the cell, causing water to enter the cell by osmosis, making it swell. Dilute solutions are hypotonic. Hypertonic solutions cause cells to shrink, while isotonic solutions maintain cell size.
Which structure is found in plant cells but NOT in animal cells?
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Cell wall
Cell wall is a rigid outer covering made of cellulose that is present only in plant cells. It provides structural strength and protection. Animal cells have only a flexible plasma membrane as their outer boundary.
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