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Cell: The Building Block of Life

Science · CBSE Class 9 · English Medium · 15 questions and answers

Sample questions

Q: What is the basic structural and functional unit of life?

A: The cell.

Q: Who first observed cells?

A: Robert Hooke observed cells in a thin slice of cork in 1665.

Q: What is the plasma membrane?

A: The plasma membrane is the selectively permeable outer boundary of a cell that regulates the movement of substances into and out of the cell.

Q: What is osmosis?

A: Osmosis is the movement of water through a selectively permeable membrane from a region of higher water concentration to a region of lower water concentration.

Q: What is the function of the cell wall?

A: The cell wall provides protection, support and rigidity to plant cells.

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