Definition of retain. transitive verb. 1a : to keep in possession or useb : to keep in one's pay or service; specifically : to employ by paying a retainerc : to keep in mind or memory : remember.
However, some gram- positive bacteria may also have capsules. Examples for gram-negative bacteria with capsules: Escherichia â¦coli, Klebsiella pneumoniae, Salmonella. Examples for gram-positive bacteria with capsules : Bacillus megaterium, Streptococcus pyogenes, Sterptococcus pneumoniae.
The lipopolysaccharide (LPS) layer that is found in the outer membrane of Gram-negative bacteria is also know as: D a. exotoxin b. teichoic acid c. murein d. endotoxin . 21. Which of the following is not true of capsules? E