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In the list provided, the item that is not found in all cells is the Cell Wall.
Here's a breakdown:
1. DNA is found in all cells: DNA carries genetic information and is essential for cell functioning.
2. Ribosomes are found in all cells: Ribosomes are involved in protein synthesis, a crucial process for cell survival.
3. Plasma Membrane is found in all cells: The plasma membrane surrounds the cell, regulating the passage of substances in and out of the cell.
However, the Cell Wall is not found in all cells. Cell walls are present in plant cells, fungi, and some bacteria, but not in animal cells. The cell wall provides structural support and protection to the cell, but its presence is not universal across all cell types.
I hope this helps clarify which component is not found in all cells. If you have any more questions or need further explanation, feel free to ask!
