Humber Admissions Practice Test

What is a prokaryotic cell?

1. A cell with membrane-bound organelles

2. A type of cell lacking a membrane-enclosed nucleus and organelles

3. A cell that can perform photosynthesis

4. A specialized cell for reproduction

The correct answer is: A type of cell lacking a membrane-enclosed nucleus and organelles

A prokaryotic cell is defined as a type of cell that lacks a membrane-enclosed nucleus and organelles. This distinction is fundamental in cell biology, as prokaryotes—like bacteria and archaea—are characterized by their simpler structure compared to eukaryotic cells, which do have membrane-bound nuclei and organelles. The absence of a nucleus means that the genetic material in prokaryotic cells is not enclosed within a membrane. Instead, it exists in an area of the cell known as the nucleoid. Understanding this cellular structure is crucial because it highlights the fundamental differences in organization and functionality between prokaryotic and eukaryotic cells. This knowledge helps in various fields, including microbiology, genetics, and evolutionary biology, by providing insight into the cellular processes that govern life forms on Earth.