Final answer:
All prokaryotic and eukaryotic cells have a plasma membrane, cytoplasm, nucleic acid, and ribosomes in common. These structures are crucial for cell function and maintenance.
Therefore the correct answer is option is a) Ribosomes
Step-by-step explanation:
All prokaryotic and eukaryotic cells have four structures in common, which are essential to their function and maintenance. These common features are the plasma membrane, the cytoplasm, nucleic acid (DNA), and ribosomes. The plasma membrane serves as a selective barrier that regulates the movement of substances in and out of the cell.
The cytoplasm is a jelly-like material within the cell where the cellular machinery operates. Nucleic acid, which is the genetic material, dictates the cell's functions and inheritance. Ribosomes are the molecular machines that synthesize proteins by translating the genetic code. These components are vital to the survival and operations of both cell types.