Cell Structure and Function — Practice Quiz
Telangana Open School (TOSS) · Class 12 · Biology
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Who first discovered cells in a piece of cork?
What is the basic structural and functional unit of life?
Which of the following is an example of a unicellular organism?
Which scientist observed living cells and called them 'animalcules'?
Sample Questions
What does the term 'protoplasm' include?
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Cytoplasm and nucleus
Protoplasm is the living content of a cell, consisting of both cytoplasm and nucleus, which carry out essential life processes.
Which of the following organisms lacks a well-defined nucleus?
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Bacteria
Bacteria are prokaryotes and lack a well-defined nucleus. Their DNA floats freely in the cytoplasm.
What is the main function of the plasma membrane?
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To regulate entry and exit of substances
The plasma membrane is selectively permeable and controls the movement of substances into and out of the cell.
Which model explains the structure of the plasma membrane?
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Fluid mosaic model
The fluid mosaic model, proposed by Singer and Nicolson in 1972, is widely accepted and describes the plasma membrane as a lipid bilayer with embedded proteins.
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