Question

a diseased cell is no longer able to produce proteins. which cell structure is most likely malfunctioning? mitochondrion ribosome cytoplasm cell membrane

Explanation:

Ribosomes are the sites of protein - synthesis in the cell. If a cell cannot produce proteins, the ribosome is most likely malfunctioning. Mitochondria are for energy production, cytoplasm is the fluid part of the cell containing organelles, and the cell membrane is for cell protection and transport.

Answer:

B. ribosome