Cells can be very diverse: superficially, they come in various sizes, ranging from bacterial cells such as lactobacillus, which is a few in length, to larger cells such as a frog's egg, which has a diameter of about one . despite the diversity, cells resemble each other to an astonishing degree in their chemistry. for example, the same 20 are used to make proteins. similarly, the genetic information of all cells is stored in their . although contain the same types of molecules as cells, their inability to reproduce themselves by their own efforts means that they are not considered living matter.