Question

15.
which one of the cells shown is eukaryotic?
the cell that contains the ribosomes
the cell that contains cytoplasm
the cell that contains the nucleus
the cell that does not contain the nucleus

Explanation:

To determine the eukaryotic cell, we use the key characteristic of eukaryotic cells: they have a true nucleus (enclosed by a nuclear membrane) and membrane - bound organelles.

• Option A: Both prokaryotic and eukaryotic cells have ribosomes, so this is not a distinguishing feature.
• Option B: Both prokaryotic and eukaryotic cells have cytoplasm, so this is not a distinguishing feature.
• Option C: Eukaryotic cells have a nucleus (a membrane - bound organelle that contains genetic material), while prokaryotic cells have a nucleoid (a region with genetic material but no nuclear membrane). So the cell with a nucleus is eukaryotic.
• Option D: Prokaryotic cells also do not have a nucleus (they have a nucleoid), so this describes a prokaryotic cell.

Answer:

C. The cell that contains the nucleus