Kaplan Nursing Entrance Practice Exam

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Which of the following is NOT a characteristic of eukaryotic cells?

The presence of a nucleus
The presence of membrane-bound organelles
The presence of a cell wall in all cases
They can be multicellular

The correct answer is: The presence of a cell wall in all cases

Eukaryotic cells are defined by several key characteristics, which include the presence of a nucleus, membrane-bound organelles, and the potential to form multicellular organisms. However, the statement regarding the presence of a cell wall in all cases does not hold true for eukaryotic cells, making it the correct choice here. While some eukaryotic organisms, such as plants and fungi, possess a cell wall, this structure is not universally present in all eukaryotic cells. For instance, animal cells, which are also eukaryotic, lack a cell wall entirely. This variability highlights that while some eukaryotic cells can have a cell wall, it is not a defining feature applicable to all eukaryotic cells. Thus, the option indicating that a cell wall is present in all cases is incorrect, making it distinct from the other characteristics associated with eukaryotic cells.