SSC
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which structure is not a component of all cells?
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cell wall
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cell membrane
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genetic material
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ribosomes
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Explanation:
Detailed explanation-1: -All cells have a cell membrane, but not all cells have a cell wall.
Detailed explanation-2: -Animal cells lack cell walls. The cell wall is present in plant cells, bacteria, and fungi.
Detailed explanation-3: -Unlike the animal extracellular matrix, which is rich in protein and other nitrogen-containing polymers, the plant cell wall is made almost entirely of polymers that contain no nitrogen, including cellulose and lignin.
Detailed explanation-4: -Cell wall is absent in animal cells and the cell membrane is the outermost covering in them.
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