In the list definition XML, add a ContentTypeRef element to the ContentTypes element. Set the ID attribute of the ContentTypeRef element to the content type ID of the content type that you want to include on the list.or more information about the ContentTypes element in the list definition schema, see ContentTypes Element (List) . Adding Content Types to an Existing SharePoint List. You can use the SharePoint Foundation object model to add content types to an existing list.
Prokaryotic Cell Structure. Prokaryotic cells are not as complex as eukaryotic cells. They have no true nucleus as the DNA is not contained within a membrane or separated from the rest of the cell, but is coiled up in a region of the cytoplasm called the nucleoid. Prokaryotic organisms have varying cell shapes.
Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not. Differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts, the cell wall, and the structure of chromosomal DNA. The cell walls of prokaryotes are generally formed of a different molecule (peptidoglycan) to those of eukaryotes (many eukaryotes do not have a cell wall at all). 2  Prokaryotes are usually much smaller than eukaryotic cells.