9. What feature of eukaryotic cytoplasmic membranes differentiates it the most from prokaryotic cytoplasmic membranes? Prokaryotic cytoplasmic membranes do not contain phospholipids. The composition of the phospholipid layer facing the outside of the cell is significantly different compared to the lipid layer facing the cytoplasm. Unique proteins penetrating the cytoplasmic membrane. (Hint: are there unique cytoplasmic membrane-protein differences found in eukaryotic cells?) Eukaryotic cytoplasmic membranes do not contain phospholipids. Staphylococcus species can be distinguished from Streptococcus, Enterococcus, and Lactococcus species on the basis of catalase activity. True False Which of the following about bacterial diversity are FALSE? Squid and flashlight fish have specialized organs that carry nitrogen-fixing bacteria. Cyanobacteria are photosynthetic. Agrobacterium species carry plasmids with genes for a toxin that destroys plant cells. Studies of bioluminscent bacteria lead to the discovery of quorum sensing. The Ti plasmid of Agrobacterium species is used to genetically engineer plants. Squid and flashlight fish have specialized organs that carry bioluminescent bacteria.