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Cell Structure
and Function
Biomembranes
Photosynthesis
Cell
Respiration
DNA Structure
and Replication
Contacts
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Cell
Structure and Function
Concept 1: Common Features of All
Cells
The common
features of prokaryotic and eukaryotic cells are:
1. DNA, the genetic material contained in one or more chromosomes
and located in a nonmembrane bound nucleoid region in prokaryotes
and a membrane-bound nucleus in eukaryotes
2. Plasma membrane, a phospholipid bilayer with proteins that
separates the cell from the surrounding environment and functions as
a selective barrier for the import and export of materials
3. Cytoplasm, the rest of the material of the cell within the plasma
membrane, excluding the nucleoid region or nucleus, that consists of
a fluid portion called the cytosol and the organelles and other
particulates suspended in it
4. Ribosomes, the organelles on which protein synthesis takes place
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