MicroBiology-Draft/Sample

Figure 3.36 An illustration of a generalized, single-celled eukaryotic organism. Note that cells of eukaryotic
organisms vary greatly in terms of structure and function, and a particular cell may not have all of the structures
shown here.

Summary of Cell Structures

Cell Structure Prokaryotes

Bacteria Archaea

Eukaryotes

Size ~0.5–1 μM ~0.5–1 μM ~5–20 μM

Surface area-

to-volume ratio

High High Low

Nucleus No No Yes

Table 3.2

114 Chapter 3 | The Cell

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