What are ribosomes? What is cell wall?

Cell wall-

rigid nonliving permeable wall that surrounds the plasma membrane and encloses and supports the cells of most plants

Explanation:

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RIBOSEMS:-A ribosome is a complex molecular machine found inside the living cells that produce proteins from amino acids during a process called protein synthesis or translation. The process of protein synthesis is a primary function, which is performed by all living cells.

CELL WALL:-the usually rigid nonliving permeable wall that surrounds the plasma membrane and encloses and supports the cells of most plants, bacteria, fungi, and algae — see cell illustration.

the contamination

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the answer would be   10%